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Family	Scientific Name	Common Name	Habitat	Distribution
Rosaceae	Crataegus ×abbreviata		Moist lowlands, prairies.	E. and coastal Texas.
Rosaceae	Crataegus ×amicalis	Friendly Hawthorn	Upland woods.	Sw. AR.
Rosaceae	Crataegus ×anamesa	Anamesa Hawthorn	Moist lowlands, prairies.	E. and coastal Texas.
Rosaceae	Crataegus ×antimima	Antimina Hawthorn	Moist lowlands, prairies.	E. and coastal Texas.
Rosaceae	Crataegus ×antiplasta	Antiplasta Hawthorn	Moist lowlands, prairies.	E. and coastal Texas.
Rosaceae	Crataegus ×atrorubens	Hybrid Red Hawthorn	Bottomland forests, upland woodlands, brush.	S. IL, MO.
Rosaceae	Crataegus ×brazoria	Brazos River Hawthorn	Stream bottoms, brushy uplands, blackland prairies.	E. TX (Brazoria and Matagorda counties) (Carr 2016).
Rosaceae	Crataegus ×canescens	Stern's Medlar	Woodlands in the Grand Prairie.	Apparently known only from Prairie County, AR.
Rosaceae	Crataegus ×collicola	Hybrid Hill Hawthorn	Streamsides, pastures, hillsides, open woodlands.	W. VA, w. NC, west to KY, MO, n. AR.
Rosaceae	Crataegus ×dallasiana	Dallas Hawthorn	Brush, streamsides, fields.	C. and e. TX, s. OK.
Rosaceae	Crataegus ×danielsii	Daniel's Hawthorn	Limestone glades, hillsides, brush.	MO, ? n. AR.
Rosaceae	Crataegus ×delawarensis	Delaware Hawthorn	Brushy areas.	Endemic to DE.
Rosaceae	Crataegus ×disperma	Two-seed Hawthorn	Upland forests, pastures, brushy hillsides.	PA west to IN, south in the Appalachians to VA and e. KY.
Rosaceae	Crataegus ×dispessa	Monteer Hawthorn	Streamsides, brushy woodlands.	MO, AR.
Rosaceae	Crataegus ×enucleata	Fulton Hybrid Hawthorn	Upland woodlands.	Sw. AR.
Rosaceae	Crataegus ×fecunda	St. Clair Hawthorn	Rich forests.	KY, s. IL, and MO south to ne. AR, along the Mississippi and Ohio Rivers
Rosaceae	Crataegus ×flava	Yellow Hawthorn	Dry woodlands.	Uncertain owing to uncertainties in the concept and application of the name.
Rosaceae	Crataegus ×harveyana	Harvey's Hawthorn	Rocky woodlands.	Endemic to n. and c. AR.
Rosaceae	Crataegus ×incaedua	Uncut Hawthorn	Moist woodlands, streamsides, rocky basins, openings.	IN, KY w. to MO, AR.
Rosaceae	Crataegus ×lettermanii	Letterman's Hawthorn	Mesic woodlands, scrubland, pastures.	Endemic of s. MO.
Rosaceae	Crataegus ×levis	Connecticut Hawthorn	Thin woodlands, scrubland.	MA to NY, s. to OH, PA; reported from w. NC (Phipps 2014d).
Rosaceae	Crataegus ×lucorum	Grove Hawthorn	Woodlands, streambanks.	Sporadic in NY, OH, IN, IL (w. VA?).
Rosaceae	Crataegus ×minor	Small-leaf Ouachita Hawthorn	Brushy woodlands, rocky ridges and slopes.	Endemic to the Ouachita Mountain region of AR.
Rosaceae	Crataegus ×mohrii	Mohr’s Hawthorn	Hardwood and pine-hardwood forest understories.	Rare and sporadic from MS to GA, n. to TN.
Rosaceae	Crataegus ×nitida	Shining Hawthorn	Alluvial forests.	S. IL, e. MO, e. AR.
Rosaceae	Crataegus ×notha	Mongrel Hawthorn	Gravelly hills in oak woodlands.	Endemic to Hempstead County, AR; no collections since 1921 suggest this entity may be extinct.
Rosaceae	Crataegus ×oreophila	Balsam Mountain Hawthorn	High elevation forests, balds.	Endemic to central and western Great Balsam Mountains (Jackson, Haywood Counties, NC).
Rosaceae	Crataegus ×persimilis	Plumleaf Hawthorn	Mesic, open forests, pastures.	Of a fragmentary range, known from s. PA, c. and s. OH, n. and w. KY, sw VA, s. MO.
Rosaceae	Crataegus ×poliophylla	Rosemary Hawthorn	Moist woodlands, thickets.	E. and coastal Texas.
Rosaceae	Crataegus ×rufula	Florida Mayhaw, Rufous Mayhaw	Flatwoods ponds, river swamps.	Sw. GA and adjacent Panhandle FL and s. AL.
Rosaceae	Crataegus ×sicca	Dryland Hawthorn	Rocky woodlands, forest margins, roadsides, brushy fields.	S. MO, s. OH, AR (?).
Rosaceae	Crataegus ×spes-aestatum	Hope-of-Summers	Open woodlands, thickets, streambanks.	S. IL to s. MO, historically near Mississippi River.
Rosaceae	Crataegus ×stenosepala	Narrow-sepaled Hawthorn	Moist woodlands, thickets.	Se. and coastal Texas.
Rosaceae	Crataegus ×sutherlandensis	Sutherland Springs Hawthorn	Streamsides, thickets.	Sc. TX.
Rosaceae	Crataegus ×thermopegaea	Hot Springs Hawthorn	Rocky woodlands, thickets.	Endemic to AR; described from near Hot Springs, Garland Co.
Rosaceae	Crataegus ×tripartita	Three-parted Hawthorn	Lowland woods.	E. TX.
Rosaceae	Crataegus ×vailiae	Vail’s Hawthorn	Pastures, woodlands, streambanks.	VA and NC w. to MO, AR.
Rosaceae	Crataegus ×verruculosa	Warty Hawthorn	Forest edges, streamsides, pastures, scrubland.	S. MO, possibly n. AR.
Rosaceae	Crataegus aemula	Rome Hawthorn	Upland hardwood and pine-hardwood forests over sandstone, calcareous rock or circumneutral clay soils, uncommon but sometimes locally abundant.	Nw. GA and ne. AL principally, disjunct in McCormick and Greenville counties, SC.
Rosaceae	Crataegus aestivalis	Eastern Mayhaw	Swamp forests, generally where flooded for much of the year, often flowering and fruiting while standing in water, often associated with Taxodium distichum, Nyssa aquatica, Nyssa biflora, and Planera aquatica, uncommon but sometimes locally abundant; occasionally growing as groves or stands in ‘mayhaw flats’.	Se. NC south to n. FL and se. AL. A historic report of C. aestivalis in VA appears to be based on a single specimen collected 22 July 1934 by M.L. Fernald & B. Long, in Princess Anne County; this specimen is actually C. crus-galli.
Rosaceae	Crataegus alabamensis	Alabama Hawthorn	Upland pine and pine-oak forests over clay soil.	S. AL, reported from n. FL
Rosaceae	Crataegus alleghaniensis	Allegheny Hawthorn	Upland pine and pine-oak forests with clay soils.	E. c. and ne. GA to c. and n. AL; reported from n. MS, e. TN, sw NC.
Rosaceae	Crataegus aprica	Sunny Hawthorn	Upland pine forests, pine-oak forests, mixed hardwood forests over rocky or sandy substrates, abandoned fields, roadsides.	Se. VA and NC south to s. GA and n. FL, west to e. AL. This species is most common in the upper Piedmont and Southern Appalachians of NC and SC, and sporadic in the Coastal Plain.
Rosaceae	Crataegus ashei	Ashe Hawthorn	Prairies, hardwood forests, pine-hardwood flats, especially over calcareous clay soils.	Core of range is central MS, where this species is locally common in Scott and Smith counties; sporadic in c. and s. AL, e. LA, se. AR (s. TN ?).
Rosaceae	Crataegus austromontana	Valley Head Hawthorn, Southern Mountain Hawthorn	Mountain woodlands, over sandstone or calcareous rock.	N. AL, c. and se. TN? Recently verified form Paint Rock, AL (R. Lance, pers.comm., 2023).
Rosaceae	Crataegus beata	Rochester Hawthorn	Pastures, thickets.	A northern species, distributed from NY to WI, s. to OH; ? VA, NC, TN.
Rosaceae	Crataegus berberifolia var. berberifolia	Barberry Hawthorn	Mixed hardwood and pine forests.	C. VA south to n. FL, west to TX, MO; most common in LA, s. AR, e. TX.
Rosaceae	Crataegus berberifolia var. engelmannii	Engelmann's Hawthorn	Mixed hardwood and pine forests of uplands, usually in subxeric to xeric habitats, especially over basic to calcareous soils.	Appears most common in MO and AR, mixed sporadically with the species eastward to e. TN, c. NC.
Rosaceae	Crataegus brachyacantha	Blueberry Hawthorn	Oak flatwoods, bottomland forests, margins of prairies and saline barrens, pine flatwoods.	LA, s. AR, se. OK, e. TX; one historic, disjunct record in sw. GA.
Rosaceae	Crataegus brittonii	Britton's Hawthorn	Thinly forested hills and slopes, bluffs, rock outcrops, disturbed lands, roadsides, streamsides.	Range apparently limited to sw. NC and adjacent NC Piedmont to c. SC, e. and n. GA.
Rosaceae	Crataegus buckleyi	Buckley’s Hawthorn	Upland pine and hardwood forests, rock outcrops.	W. NC, w. SC, n. GA west to n. AL.
Rosaceae	Crataegus calpodendron	Pear Hawthorn	Mixed hardwood forests, open slopes, wooded ravines, streamsides, especially over basic or calcareous rocks.	NY w. to MN, s. to GA, OK. This species is relatively common in its generally northern range, uncommon in its southern range extensions in uplands from VA to MO, and rare in the Coastal Plain of GA, AL.
Rosaceae	Crataegus coccinea	Scarlet Hawthorn	Deciduous forest understories, pastures, upland thickets.	ME w. to MN, s. to NC, OH. From its mostly northern range, this species is uncommon and sporadic in its southerly range extension on the Appalachian Plateau.
Rosaceae	Crataegus coccinioides	Kansas Hawthorn, Broadleaf Hawthorn	Thin woodlands, prairies, scrubland, pastures.	PA w. to IL, MO, se. KS, s. to KY, AR, OK. Reported from a single county in WV.
Rosaceae	Crataegus collina	Hillside Hawthorn	Hardwood and pine-oak forests of hills and valleys, brushy lands. C. collina occupies sub-xeric uplands in the Appalachian Region and is tolerant of lowland floodplains in GA, AL, TN.	Sw. VA west to KS, south to c. GA, s. AL, c. MS, AR and OK.
Rosaceae	Crataegus compacta	Clustered Hawthorn	Rocky hardwood forests, mountain pastures.	NY, ONT, and MI, south to w. VA, WV, OH. This northern species is known in VA from only 3 counties.
Rosaceae	Crataegus craytonii	Crayton Hawthorn	Wooded slopes, roadsides, streamsides.	W. NC to n. GA, n. AL, possibly e. TN; an ambiguous record in New Kent County, VA.
Rosaceae	Crataegus crus-galli var. crus-galli	Cockspur Hawthorn	Pastures, thickets, disturbed woodlands and forests, fencerows.	Ranges throughout the eastern US, except c. and s. peninsular FL, sometimes forming extensive colonies.
Rosaceae	Crataegus crus-galli var. pyracanthifolia	Narrowleaf Cockspur Hawthorn	Bottomland forests, swamp borders, lowlands, sometimes locally abundant.	DE south to n. FL, west to MO, e. TX.
Rosaceae	Crataegus dispar	Aiken Hawthorn	Upland pine or pine-oak forests under sub-xeric to xeric conditions, in well-drained clay or sandy soils.	Nc. & sc. SC and adjacent e. GA; single sporadic collections known from Panhandle FL and ne. AL.
Rosaceae	Crataegus dodgei	Dodge Hawthorn	Mesic hardwood forests, streamside thickets, pastures.	A northern species predominately of the Great Lakes Region east to CT, sporadic southward in the Appalachians to WV, VA, and nw. NC (Ashe County).
Rosaceae	Crataegus florens	Mississippi Hawthorn	Pine and pine-oak forests, subxeric to mesic habitats with sandy or clay soils.	E. NC south to n. FL, west to LA.
Rosaceae	Crataegus frugiferans	Fruitful Hawthorn	Upland, open woodlands, brushy areas.	C. and s. GA, n. FL w. to AL, MS.
Rosaceae	Crataegus furtiva	Albany Hawthorn	Upland pine forests, pine-oak scrub, longleaf pine sandhills, disturbed woodlands, abandoned fields.	Se. NC to c. AL, s. to peninsular FL.
Rosaceae	Crataegus harbisonii	Harbison’s Hawthorn	Hardwood forest understories, loess hills, calcareous woodlands.	Endemic to c. and w. TN and currently known to be extant only in Davidson and Obion Counties, TN.
Rosaceae	Crataegus holmesiana	Holmes’s Hawthorn	Woodland borders, pastures, brushy fencerows.	Reported for WV; sporadic from ME to MN, s. to PA, IL.
Rosaceae	Crataegus ignava	Valley Head Hawthorn	Upland pine and pine-oak forests, clay soils.	Ec. SC to sw. GA, north to n. AL and n. GA.
Rosaceae	Crataegus incilis	Cutleaf Beautiful Hawthorn	Mixed pine and hardwood forests, wooded hills, rocky woods.	Sw. GA and Panhandle FL, west to s. MS, north to ne. AL; locally abundant in the vicinity of lower Little River Canyon, AL and sporadically elsewhere in the known range.
Rosaceae	Crataegus intricata var. biltmoreana	Biltmore Hawthorn	Wooded hills, rock outcrops, thickets.	VT south to c. GA, west to AR, MO.
Rosaceae	Crataegus intricata var. boyntonii	Boynton’s Hawthorn	Upland forest understories, pastures, rock outcrops, shrubby thickets.	W. NC and n. SC west to n. GA.
Rosaceae	Crataegus intricata var. fortunata	Yellow-fruited Hawthorn	Hardwood forest edges, rock outcrops, thickets.	PA and WV; disjunct in w. NC (known in NC only from Chimney Rock Mountain in Rutherford County).
Rosaceae	Crataegus intricata var. intricata	Entangled Hawthorn	Pastures, wooded hills, rock outcrops, thickets.	VT to MI, IL, s. to GA, AR; relatively common in the Appalachian region.
Rosaceae	Crataegus intricata var. neobushii	Bush Hawthorn	Wooded hills, pastures, thickets.	Reported from w. NC and n. GA w. to AR, MO; more common in AR and MO.
Rosaceae	Crataegus intricata var. rubella	Little Red Hawthorn	Hardwood forests, rock outcrops, thickets.	DE, MD, VA w. to MO, s. to GA, AL.
Rosaceae	Crataegus intricata var. straminea	Straw-fruited Hawthorn	Wooded hills, thickets, disturbed forests.	PA s. to n. GA, w. to OH, c. KY, ne. AL.
Rosaceae	Crataegus iracunda var. iracunda	Forest Hawthorn	Swamps, bottomlands, moist slopes, wooded hills, overall uncommon but sometimes locally abundant.	C. MD and VA to SC, w. to s. AR, n. LA.
Rosaceae	Crataegus iracunda var. populnea	Poplar Hawthorn	Mesic to subxeric woodlands, brush, pastures.	NY w. to WI, s. to NC (n. SC?), TN, OH.
Rosaceae	Crataegus jesupii	Jesup's Hawthorn	Thickets, thin woodlands.	CT, ON, MI,WI south to PA and OH.
Rosaceae	Crataegus lacrimata	Weeping Hawthorn	Xeric, sandy soils, in scrublands and in association with sparse stands of Pinus clausa or Pinus palustris.	Endemic to the western FL Panhandle; perhaps in adjacent sandhill scrub of AL
Rosaceae	Crataegus lancei	Lance’s Hawthorn	Upland hills, hardwood-pine forests, scrubland, pastures.	S. NC to e. GA, reported from sw. GA, n. peninsular FL and se. AL. Appears to have a core range in w. SC and ne. GA, sporadic elsewhere in a fragmented range that involves broad areas devoid of specimens.
Rosaceae	Crataegus lassa var. colonica	Bluffton Hawthorn	Oak-pine scrub and sandy uplands.	Se. NC to n. FL, west to n. SC, e. GA.
Rosaceae	Crataegus lassa var. integra	Lake Ella Hawthorn	Oak-pine scrub and sandy uplands.	Central SC south to peninsular FL, west to s. and c. AL; the core range is peninsular FL and n. FL, where this entity is most common.
Rosaceae	Crataegus lassa var. lanata	Lanate Hawthorn	Oak-pine scrub and sandy uplands.	Se. NC to c. peninsular FL, west to n. GA, c. AL.
Rosaceae	Crataegus lassa var. lassa	Sandhill Hawthorn	Pine forests, oak-pine scrub, upland scrublands, xeric woodlands, especially in deep sand and soils of rapid drainage.	Central NC south to n. FL, west to s. AL.
Rosaceae	Crataegus lassa var. recurva	Ocala Hawthorn	Oak-pine scrub and sandy uplands.	Ec. NC to peninsular FL, west to s. AL; the core range is peninsular FL and n. FL, where this entity is most common.
Rosaceae	Crataegus lepida	Pygmy Hawthorn	Xeric, sandy soils of open pinelands, wiregrass-dominated roadsides and forest edges, oak-pine scrub.	S. GA south to c. peninsular FL
Rosaceae	Crataegus macrosperma	Eastern Hawthorn	Mesic to subxeric hardwood forests, wooded slopes, rock outcrops, pastures, thickets, mountain balds and rocky summits.	ME to MN, south to GA, AL, AR; C. macrosperma is widespread, particularly common in the Appalachians.
Rosaceae	Crataegus margaretiae var. angustifolia	Narrowleaf Margaret's Hawthorn	Woodland margins, brush.	S. MI and IN.
Rosaceae	Crataegus margaretiae var. brownii	Brown's Hawthorn	Mesic to subxeric woodlands, thickets, pastures.	Sporadic in VA, KY, MO, reported from WV, IN, PA.
Rosaceae	Crataegus margaretiae var. margaretiae	Margaret's Hawthorn	Mesic hardwood forests, streamside thickets, pastures.	PA west to WI, IA, south to w. VA, MO {TN, w. VA}.
Rosaceae	Crataegus marshallii	Parsley Hawthorn, Parsley Haw	Swamps, alluvial forests, mesic to subxeric upland slopes over mafic or calcareous rocks.	Se. VA south to c. peninsular FL, west to e. TX, and north in the interior to n. AL, sc. and w. TN, n. MS, s. IL, se. MO, se. OK.
Rosaceae	Crataegus mendosa	Albertville Hawthorn	Mesic hardwood forests, mixed pine-hardwood forests, upland wooded hills over calcareous substrates and well-drained clays.	Lower Piedmont and upper Coastal Plain of sc. SC, wc. GA, ne. and c. AL, and c. and s. MS.
Rosaceae	Crataegus mollis var. dumetosa	Missouri Downy Hawthorn	Mesic woodlands, calcareous uplands, pastures.	Known from IN, IL, MO and AR, reported from e. TX, ne. GA (specimens from Pocket Branch, Pigeon Mountain, GA attributable to this variety).
Rosaceae	Crataegus mollis var. lanuginosa	Webb City Hawthorn	Dry, gravelly hills.	Endemic (so far as is known) to Jasper County, MO. This entity has not been seen in many decades in its type locality and is presumed extirpated; it does survive in cultivation.
Rosaceae	Crataegus mollis var. meridionalis	Southern Downy Hawthorn	Prairies, streamsides, scrubland.	Rare and sporadic in central and s. AL and MS, primarily distributed in the Black Belt / Jackson Prairie ecoregion.
Rosaceae	Crataegus mollis var. mollis	Downy Hawthorn	Mesic forests, alluvial forests, prairies, streamsides, wooded uplands over basic or calcareous soils.	MI to e. ND, s. to AL, TX south to s. TX, e. to nw. GA; an occurrence of this species in the mountains of VA is atypical of the majority of the range, which is mostly Midwestern, west and southwest of the Appalachians.
Rosaceae	Crataegus mollis var. texana	Texas Downy Hawthorn	Riverine woodlands, brushlands, prairies.	MO, AR, TX, s. OK.
Rosaceae	Crataegus mollis var. viburnifolia	Viburnum-leaf Hawthorn	Bottomlands.	Endemic in se. TX.
Rosaceae	Crataegus monogyna	English Hawthorn, One-seeded Hawthorn	Mesic soil.	Native of Europe. Naturalized in northeastern US south to Fairfax County, VA.
Rosaceae	Crataegus munda	Dwarf Hawthorn, Neat Hawthorn	Longleaf pine sandhills, other xeric or subxeric forests, scrublands, disturbed woodlands.	C. NC south to n. FL, west to s. and c. AL.
Rosaceae	Crataegus nananixonii	Nixon's Dwarf Hawthorn	Sandy soil in shortleaf pine and oak woodlands.	Endemic to e. TX.
Rosaceae	Crataegus opaca	Western Mayhaw	Bottomlands, swampy forests, lowland depressions and wetland soils where flooded for periods of the year.	E. TX to Escambia and Santa Rosa counties, FL (Kunzer et al. 2009).
Rosaceae	Crataegus ouachitensis	Ouachita Hawthorn	Thickets along streams, rocky ridges and slopes.	Endemic to the Ouachita Mountain region of AR.
Rosaceae	Crataegus padifolia	Cherry-leaf Hawthorn	Rocky woodlands, brushland, streamsides.	S. MO, e. OK, AR.
Rosaceae	Crataegus pallens	Pale-fruited Hawthorn	Slopes and rock outcrops, especially over mafic substrates.	Endemic to southern Appalachians: w. NC (Buncombe, Madison Cos), and perhaps in ne. AL, n. GA.
Rosaceae	Crataegus palmeri	Palmer's Hawthorn	Hardwood and pine-hardwood forests, scrubland, brush.	Sporadic from se. KS, e. OK, e. TX to AR, MO, and TN (?).
Rosaceae	Crataegus pennsylvanica	Pennsylvania Hawthorn	Mesic, open forests, alluvial forests.	PA and OH, s. to c. WV; somewhat disjunct in sw. VA where it is apparently native; naturalizing near a cultivated specimen in Buncombe Co, NC.
Rosaceae	Crataegus pexa	Woolly Dwarf Hawthorn	Longleaf pine sandhills, other xeric or subxeric forests, pine and oak scrublands, and disturbed woodlands.	Sc. NC south to n. FL, west to s. and c. AL; one population in Southampton County, VA (Lance 2014). This taxon is locally common in Cumberland County, NC.
Rosaceae	Crataegus phaenopyrum	Washington Hawthorn	Mesic upland woodlands, floodplain forests, pastures, thickets, disturbed areas, sometimes locally abundant.	Native range presumed to be PA south to SC, west to sw. MO, AR; also c. and s. AL s. to n. FL; naturalized populations originating from widespread cultivation may be involved in parts of this range, with additional expansions becoming evident.
Rosaceae	Crataegus pinetorum	Pineland Hawthorn	Upland hardwood and hardwood-pine forests, rock outcrops.	Nw. SC, n. GA, n. & c. AL, and MS.
Rosaceae	Crataegus pruinosa var. dissona	Northern Frosted Hawthorn	Upland hardwood forests, brush, pastures, rock outcrops.	PA to NC, w. to MO, se. OK.
Rosaceae	Crataegus pruinosa var. gattingeri	Gattinger's Hawthorn	Hardwood and pine-hardwood woodlands, brush, pastures.	PA to GA, west to MO, AR; extending south into the Coastal Plain in AL, MS, LA, and AR.
Rosaceae	Crataegus pruinosa var. magnifolia	Bigleaf Frosted Hawthorn	Rocky woodlands, streamsides, chalk barrens.	MO, ?AR.
Rosaceae	Crataegus pruinosa var. parvula	Small-leaf Frosted Hawthorn	Sparse woodlands, pastures.	MA to MI, s. in Appalachians to w. VA, and NC (?).
Rosaceae	Crataegus pruinosa var. pruinosa	Frosted Hawthorn	Upland hardwood forests, pastures, rock outcrops, mountain summits and balds, sometimes colonial or locally abundant.	ME to WI, IA, s. to NC, TN, AR.
Rosaceae	Crataegus pruinosa var. rugosa	Wide-leaved Frosted Hawthorn	Rocky woodlands, upland forests, rock outcrops, mountain pastures.	NY to WI, IA, s. to NC, TN, AR.
Rosaceae	Crataegus pruinosa var. virella	Hairy Frosted Hawthorn	Open woodlands, rocky uplands.	NY to WI, s. to n. VA, OH; also in MO, AR, se. OK.
Rosaceae	Crataegus pulcherrima var. opima	Broad-leaved Beautiful Hawthorn	Hardwood and hardwood-pine forests, ravines, mesic slopes.	Sw. GA, s. & c. AL, MS, e. TX.
Rosaceae	Crataegus pulcherrima var. pulcherrima	Beautiful Hawthorn	Hardwood and hardwood-pine forests, ravines, mesic slopes, sometimes locally abundant.	W. GA and Panhandle FL, w. to LA and extreme e. TX; disjunct populations have been reported from Richmond and Burke Cos, GA.
Rosaceae	Crataegus punctata	Dotted Hawthorn	High elevation forests, grassy balds, rock outcrops. C. punctata, often in company with C. macrosperma, comprises the majority of hawthorn forests, ‘orchards’, and thickets seen in the high elevations of the North Carolina Blue Ridge, in openings and disturbed northern hardwood and spruce-fir forests.	E. Canada and ME west to MN, IA, south (mainly montane) to VA, WV, KY, NC and TN.
Rosaceae	Crataegus quaesita var. egens	Sand Barren Hawthorn	Sandy scrublands, pine woodlands.	S. SC to s. AL and peninsular FL.
Rosaceae	Crataegus quaesita var. floridana	Jacksonville Hawthorn	Oak-pine forests, sandy scrublands.	Se. NC to c. GA, s. AL, s. to Panhandle and peninsular FL.
Rosaceae	Crataegus quaesita var. quaesita	Florida Hawthorn	Oak-pine forests, xeric woodlands, especially in sandy soils.	S. GA, n. and peninsular FL.
Rosaceae	Crataegus ravenelii	Ravenel’s Hawthorn	Longleaf pine sandhills, upland pine and pine-oak forests, rocky woodlands, xeric or subxeric habitats with sandy or well-drained clay soils.	Se. NC s. to n. FL, w. to central AL.
Rosaceae	Crataegus reverchonii	Reverchon Hawthorn	Scrubland, prairie borders, streamsides.	C. and e. TX, OK, se KS, sw MO, w AR, nw. LA.
Rosaceae	Crataegus sargentii	Sargent's Hawthorn	Upland forests, rocky woodlands, over calcareous or circumneutral substrates.	W. GA, n. and c. AL, reported from c. MS and c. panhandle FL.
Rosaceae	Crataegus scabrida var. asperifolia	Rough Hawthorn	Mesic hardwood forests, streamside thickets.	A northern species predominantly of eastern Canada and the Great Lakes Region, east to NH; the var. asperifolia (Sargent) Kruschke is reported as disjunct for VA by Phipps (FNA9).
Rosaceae	Crataegus schuettei	Schuette's Hawthorn	Mesic upland forests, thin woodlands, brushy fields, rock outcrops, sometimes locally abundant.	Ranging predominately north of our area, in NH, NY, PA west to WI and n. IL, extending south in Appalachian Plateau to WV and w. NC (e. TN?), and south to MO and n. AR (?).
Rosaceae	Crataegus senta	Rough Hawthorn	Hardwood-pine forests, sandhill woodlands, scrubland, pastures.	NC to s. GA, with outlier populations reported from n. FL, AL and LA. The type locality is Buncombe Co., NC, but this species has not been re-located there in recent times; it appears best represented in SC.
Rosaceae	Crataegus sororia	Sister Hawthorn	Upland disturbed forests, scrublands, roadsides.	C. NC to n. AL, s. to n. FL.
Rosaceae	Crataegus spathulata	Littlehip Hawthorn	Scrubland, pine-oak woodlands, bottomland forests, rocky uplands over mafic or calcareous substrates, oak savannas.	Se. VA and c. NC south to panhandle FL, west to e. TX, north in the interior to c. TN, sw. MO, e. OK; sporadic in TN, sw. NC.
Rosaceae	Crataegus submollis	Quebec Hawthorn	Scrubland, field margins, usually on calcareous substrates.	E. Canada south to n. PA, n. MI, e. WI. This northern species is rare in our area but might be expected to locally spread from cultivation in OH, WV and MD. A MA form with 16-20 mm fruit, larger than the typical 10-15 mm fruit, was known in the Arnold Arboretum and promoted for cultivation in the early 1900's.
Rosaceae	Crataegus succulenta var. macracantha	Large-spine Hawthorn	Rocky or mesic hardwood forests, upland pastures, clearings, shaley soils.	Ranging across all of southern Canada and ME to OR, s. in mountainous uplands to AZ, NM, e. to KS, n. MO, sw. VA, ?NC; the most widely distributed hawthorn in North America.
Rosaceae	Crataegus succulenta var. neofluvialis	New River Hawthorn	Rocky summits, mesic forests, streamsides, brushy fields.	NC, VA, MO, VT (?); the core range appears to be the Blue Ridge of nw. NC and adjacent VA, but entire range is unclear due to scant records and ambiguous morphology.
Rosaceae	Crataegus succulenta var. succulenta	Fleshy Hawthorn	Rocky summits, mesic forests, upland pastures, especially over basic soil or mafic substrates.	Widespread from eastern Canada and Great Lakes area to New England, s. from MN to n. MO, OH, PA, extending along the Appalachians in WV, VA and NC.
Rosaceae	Crataegus teres	Smooth Alabama Hawthorn	Pine-oak forests, sandy woodlands.	S. AL, possibly e. to GA.
Rosaceae	Crataegus triflora	Threeflower Hawthorn	Wooded ravines, mesic slopes, limestone outcrops, flatwoods, prairies.	Nw. GA to n. MS, s. to s. AL, MS; disjunct populations in prairie sites of Houston Co, GA, c. LA, s. AR (possibly in se. TN?).
Rosaceae	Crataegus uniflora	Oneflower Hawthorn	Thin woodlands, disturbed lands, roadsides, rock outcrops, often in xeric or sub-xeric conditions.	NY to peninsular FL, w. to IL, MO, OK, e. TX.
Rosaceae	Crataegus venusta	Red Mountain Hawthorn	Rocky woodlands, brush, cutover forests.	C. AL and Grundy County, TN.
Rosaceae	Crataegus viridis var. glabriuscula	Texas Green Hawthorn	Alluvial woodlands, streamsides, prairies, usually where soils are basic or calcareous.	E. TX n. to s. OK, e. AR.
Rosaceae	Crataegus viridis var. lanceolata	Lanceleaf Green Hawthorn	Moist forests and woodlands, streamsides, calcareous uplands.	SC to FL, w. to e. TX, AR; range sympatric with much of the typical variety of the species.
Rosaceae	Crataegus viridis var. ovata	Roundleaf Green Hawthorn	Alluvial woodlands, moist, brushy fields, uplands in calcareous soils.	MO s. to AR, n. LA, e. TX.
Rosaceae	Crataegus viridis var. velutina	Velvety Green Hawthorn	Bottomland forests, field borders, moist to wet woodlands.	MS, AR, n. LA, e. TX.
Rosaceae	Crataegus viridis var. viridis	Green Hawthorn, Greenhaw	Swamps, bottomland forests, alluvial woodlands, streamsides, wet flatwoods, and uplands where soils are often basic to calcareous.	MD to n. FL, w. MO, c. TX; absent or rare on Appalachian Plateau.
Rosaceae	Crataegus visenda	Bristol Hawthorn	Longleaf pine sandhills, other upland pine and pine-oak forests, disturbed lands, wooded hills with clay or sandy soils, often in xeric or sub-xeric conditions.	C. NC and nw. GA south to n. FL and s. AL.

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