130 results for family: Onagraceae. More search options

Family	Scientific Name	Common Name	Habitat	Distribution	Image
Onagraceae	Chamaenerion	Fireweed
Onagraceae	Chamaenerion angustifolium ssp. circumvagum	Great Willow-herb, Fireweed	Grassy balds, roadsides, montane fields, burned areas, disturbed areas.	Circumboreal, extending south in North America to NJ, montane w. NC and ne. TN, n. IN, MN, SD, AZ, NM, and CA.
Onagraceae	Circaea	Enchanter's-nightshade
Onagraceae	Circaea ×sterilis	Hybrid Enchanter's-nightshade	Mesic, nutrient-rich forests.	NL (Newfoundland) west to ON and MN, south to w. NC, OH, and WI; it appears to be rare in our area, but should be sought more carefully.
Onagraceae	Circaea alpina ssp. alpina	Alpine Enchanter's-nightshade	Moist organic soil at high elevations (especially in spruce-fir and northern hardwood forests), rocky or gravelly seepages, in spray behind waterfalls, at dripping cliff bases.	Ssp. alpina is itself circumboreal, in North America ranging from NL (Newfoundland) and NL (Labrador), west to AK, south to MD, w. NC, e. TN, KY, n. IL, MN, MT, and WA, disjunct in montane sites southward in the w. United States, such as the Black Hills of SD, and isolated montane sites in CO, AZ, and NM.
Onagraceae	Circaea canadensis	Canada Enchanter's-nightshade	Mesic, nutrient-rich forests.	NS and NB west to se. MB and ND, south to e. NC, c. SC, s. GA, LA, OK, and NE.
Onagraceae	Epilobium	Willow-herb) [also see Chamerion]
Onagraceae	Epilobium brachycarpum		Railroad yards, a waif.	QC, ON, and BC south to MN, w. NE, NM, AZ, CA, and Mexico.
Onagraceae	Epilobium ciliatum ssp. ciliatum	American Willow-herb	Bogs, seeps, disturbed wet places (such as moist edges of logging roads).	NL (Newfoundland) and NL (Labrador) west to AK, south to VA, w. NC, nw. SC (Bradley et al. [in prep.]), ne. TN, IN, IA, CA, TX, Mexico, Central America; disjunct in Chile and Argentina.
Onagraceae	Epilobium ciliatum ssp. glandulosum	Northern Willow-herb	Seeps, other wet habitats.	NL west to AK, south to n. NJ, NY, n. OH, MI, WI, MN, SD, NM, AZ, CA; e. Asia.
Onagraceae	Epilobium coloratum	Bronze Willow-herb, Eastern Willow-herb	Seepages, streambanks, other moist open places.	ME west to MN, south to NC, n. GA, AL, AR, and TX; allegedly disjunct in Hispaniola.
Onagraceae	Epilobium densum	Northeastern Willow-herb, Downy Willow-herb, Soft Willow-herb	Marshes, bogs.	QC west to MN, south to s. NJ, n. VA (?), WV, OH, IN, c. IL, and IA. Reported for Arlington County, VA; the single record is regarded as questionable.
Onagraceae	Epilobium hirsutum	Hairy Willow-herb, Codlins-and-Cream	Disturbed areas.	Native of Eurasia. Naturalized south to s. PA (Rhoads & Klein 1993; Rhoads & Block 2007), MD, and WV (Kartesz 1999, 2010).
Onagraceae	Epilobium leptophyllum	Narrowleaf Willow-herb, American Marsh Willow-herb	Bogs, fens, seepages, and boggy meadows.	NL (Newfoundland) and NT west to BC and AK, south to w. NC, ne. TN, KS, ne. TX (Mink, Singhurst, & Holmes 2011b), and CA.
Onagraceae	Epilobium palustre	Marsh Willowherb	Bogs, wooded swamps.	Circumboreal, south in North America to PA, MI, MN, NE, NM, and CA.
Onagraceae	Epilobium parviflorum	Smallflower Hairy Willowherb	Moist shores, cattail marshes, drawdown areas.	Native of Europe. Reported for WV (Elizabeth Byers, pers.comm., 2021) and for e. KY (V. Voelker, pers.comm., 2024).
Onagraceae	Epilobium roseum			PA (Kartesz 2022).
Onagraceae	Ludwigia	Seedbox, Water-primrose, Water-purslane
Onagraceae	Ludwigia alata	Winged Seedbox	Interdune ponds, freshwater to slightly brackish (oligohaline) marshes, cypress swamps.	Se. VA south to s. FL, west to se. LA; disjunct in Jamaica, where apparently introduced.
Onagraceae	Ludwigia alternifolia	Alternate-leaved Seedbox	Freshwater tidal marshes, ditches, other marshes, open wet places, disturbed wet places.	MA west to s. ON, s. MI, IA, and KS, south to n. FL and e. TX.
Onagraceae	Ludwigia arcuata	Pondshore Seedbox	Marshes or submerged in water of natural Coastal Plain ponds.	Ne. SC south to s. FL, west to Panhandle FL and s. AL.
Onagraceae	Ludwigia bonariensis		Freshwater tidal marshes and adjacent disturbed areas.	Apparently native of tropical America. Locally abundant in disturbed edges of freshwater tidal marshes near Wilmington, NC, perhaps introduced on ship's ballast.
Onagraceae	Ludwigia brevipes	Long Beach Seedbox, Coastal Plain Water-purslane	Pondshores, blackwater rivers, interdunal swales, borrow ponds, ditches, impoundments, tidal freshwater marshes, other marshes.	NJ south to e. GA (Jones & Coile 1988), and Panhandle FL (Escambia County), in the Coastal Plain.
Onagraceae	Ludwigia curtissii	Curtiss’s Seedbox	Pine savannas, flatwoods, marshes, marl prairies, pond shores.	Nc. FL south to s. FL; Bahamas.
Onagraceae	Ludwigia decurrens	Wingstem Water-primrose	Swamp forests, marshes, ditches.	MD, w. VA, WV, s. IN, s. IL, and MO, south to s. FL and TX; West Indies; Mexico (CAM, CHP, COL, JAL, MIC, NAY, TAB), Central America and South America; Africa and Asia.
Onagraceae	Ludwigia erecta	Yerba de Jicotea	Marshes, swamps, pineland ponds.	FL; West Indies; tropical America; tropical Africa and Madagascar. Also in Coastal Plain of MS and e. TX, probably by introduction.
Onagraceae	Ludwigia glandulosa	Small-flowered Seedbox	Low forests, marshes, ditches.	E. MD south to n. FL, west to e. TX, north in the interior to c. TN, w. KY, s. IN, s. IL, se. MO, c. AR, and se. OK, primarily on the Southeastern Coastal Plain.
Onagraceae	Ludwigia grandiflora	Showy Water-primrose	Ponds, lakes, sluggish waters of ditches or streams.	Se. SC south to FL, west to TX; disjunct in MO, Guatemala, and in s. South America.
Onagraceae	Ludwigia hexapetala	Common Water-primrose	Ponds, lakes, sluggish waters of ditches or streams.	NC south to FL, west to OK and TX; also in CA, Europe, South America, Mexico; also introduced farther north in North America. Reported for DE and MD (Longbottom, Naczi, & Knapp 2016).
Onagraceae	Ludwigia hirtella	Rafinesque's Seedbox, Spindleroot, Hairy Seedbox	Pine savannas, rarely inland in boggy seepage in barrens and oak flatwoods.	S. NJ south to Panhandle FL, west to e. TX, north in the interior to KY, c. TN, AR, and se. OK.
Onagraceae	Ludwigia lanceolata	Lanceleaf Seedbox	Pocosins, interdune ponds, open wet areas.	Se. NC south to c. peninsular FL, west to Panhandle FL.
Onagraceae	Ludwigia leptocarpa	Water-willow	Riverbanks, marshes, swamps, and ditches, often on logs or tree bases in deep swamps.	VA south to c. peninsular FL, west to e. TX, north in the interior along the Mississippi and Ohio rivers to se. MO, s. IL, and w. WV; and in tropical America.
Onagraceae	Ludwigia linearis var. linearis	Eastern Narrowleaf Seedbox	Pine savannas, swamps, marshes.	Var. linearis ranges from s. NJ south to c. peninsular FL, west to se. LA, extending inland to the Cumberland Plateau of nc. AL and c. TN.
Onagraceae	Ludwigia linearis var. puberula	Western Narrowleaf Seedbox	Pine savannas, prairies, interdunal swales, ditches.	Var. puberula ranges primarily from c. AL west to c. AR and e. MO, south to e. TX, with intergradational material extending as far north and east as n. FL and e. NC.
Onagraceae	Ludwigia linifolia	Flaxleaf Seedbox	Limesink ponds (dolines) and Taxodium ascendens savannas; wet pine savannas.	Nc. NC south to s. FL, west to s. MS; disjunct in s. Mexico (TAB).
Onagraceae	Ludwigia longifolia	Longleaf Seedbox	Swamps, marshes.	Native of South America.
Onagraceae	Ludwigia maritima	Harper's Seedbox	Pine savannas, pine flatwoods, bogs.	E. NC south to s. peninsular FL, west to e. LA.
Onagraceae	Ludwigia microcarpa	Small-fruited Seedbox	In circumneutral or alkaline soils of moist places, over calcareous rock, mafic rock, shell hash, or brackish sands, such as in maritime wet grasslands, savannas and adjacent ditches over coquina limestone (‘marl’), and wet clay flats over diabase, often in roadside ditches, and inland in calcareous fens and wet calcareous glades.	Ne. NC south to s. FL, west to se. TX (Brown & Marcus 1998); disjunct inland on calcareous or mafic rocks in nc. NC, nc. SC, n. GA, n. AL, c. and e. TN, sc. MO, and nc. AR; also in the Bahamas, Cuba, and Jamaica.
Onagraceae	Ludwigia octovalvis	Mexican Primose-willow	Marshes, disturbed areas.	Se. NC south to s. FL, west to TX; and widespread in tropical America; Old World tropics and subtropics. The native and non-native components of the distribution are unclear, but Mohr (1901) referred to Jussiaea suffruticosa as "occurring near ballast heaps; presumably a fugitive from the tropics".
Onagraceae	Ludwigia palustris	Common Water-purslane	In a wide range of natural and altered moist to wet, disturbed areas, such as ditches, marshes, swamps, saturated firelanes and other wet sandy areas. Often in areas with some standing water, at least seasonally.	Widespread in North America, West Indies, Mexico, Central America, South America, Central Eurasia, Africa, and Asia.
Onagraceae	Ludwigia peploides var. glabrescens	Floating Primrose-willow	Pools, ditches, disturbed places.	PA, VA and NC south and west to FL and AZ; Mexico; Venezuela. Doubtfully native in the eastern parts of our area.
Onagraceae	Ludwigia peploides var. montevidensis		Marshes.	Native of South America.
Onagraceae	Ludwigia peploides var. peploides		Canals, ditches, sluggish waters.	TX, NM, AZ, and CA south to Mexico, Central America, South America; West Indies.
Onagraceae	Ludwigia peruviana	Primrose-willow	Swamps, pondshores.	Native of the Neotropics. In s. GA (Jones & Coile 1988). Reported for NC (Kartesz 1999, 2022). All or part of the Southeastern distribution is as an alien species.
Onagraceae	Ludwigia pilosa	Hairy Seedbox	Swamps, ditches, blackwater streams, other wet places.	Se. VA south to n. FL, west to se. TX, restricted to the Coastal Plain except for disjunct occurrences inland in NC, VA, and n. AL.
Onagraceae	Ludwigia polycarpa	Manyfruit Seedbox	Wet meadows, swales.	MA, CT, and w. VT west to s. ON, MI, WI, MN, and c. NE, south to c. VA, KY, s. IL, s. MO, and e. KS.
Onagraceae	Ludwigia ravenii	Raven's Seedbox	Margins of Coastal Plain ponds, wet pine savannas, swamps, marshes, wet open places.	Se. VA south to ne. FL, restricted to the Coastal Plain.
Onagraceae	Ludwigia repens	Creeping Seedbox	Ditches, pools, and streams.	Se. VA south to s. FL, west to TX, CA, and n. Mexico, north in the interior to TN, MO, and OK; Bermuda; West Indies; Central and South America.
Onagraceae	Ludwigia simpsonii	Simpson's Seedbox	Ponds, ditches.	Ne. FL, Panhandle FL, s. MS (?) south to s. FL; West Indies (Bahamas, Cuba, Jamaica).
Onagraceae	Ludwigia spathulata	Southern Water-purslane	Sinkhole ponds, cypress-gum ponds, depression meadows, boggy shores.	SC south to Panhandle FL and s. AL.
Onagraceae	Ludwigia species 1 [=brachycarpa]		Prairies, meadows, ditches, seeps.	Sw. AR and s. OK south to sw. LA and e. and c. TX.
Onagraceae	Ludwigia sphaerocarpa	Globe-fruited Seedbox	Boggy areas, pools, ditches, river marshes, interdune swales, river and pondshores, tidal freshwater marshes.	E. MA south to n. FL, west to e. TX, primarily on the Coastal Plain, spottily distributed in that range, and also disjunct in w. NY, sc. TN, s. IN, and nw. IN, ne. and s. IL. Recently rediscovered in Illinois in 2019 by Paul Marcum in Pope County, approximately 160 years after first being discovered in the state much further north in Cook County. This species otherwise primarily occurs in the coastal plain outside of its Great Lakes disjunction.
Onagraceae	Ludwigia suffruticosa	Pond Seedbox, "Shrubby Seedbox"	Periodically to seasonally flooded portions of limesink ponds (dolines) and pondcypress savannas of clay-based Carolina bays, other seasonally ponded wetlands.	Se. NC south to s. peninsular FL, west to Panhandle FL and se AL.
Onagraceae	Ludwigia virgata	Savanna Seedbox	Wet pine savannas and pine flatwoods.	Se. VA south to s. peninsular FL, west to Panhandle FL and se. AL.
Onagraceae	Oenothera	Evening-primrose
Onagraceae	Oenothera albicaulis		Dry, sandy areas.	ND and MT south to sc. OK, wc. TX, w. TX, NM, AZ, and n. Mexico (CHH, SON).
Onagraceae	Oenothera argillicola	Shale-barren Evening-primrose	Shale barrens and woodlands.	Sc. PA south through MD to e. WV and w. VA (south to Montgomery County).
Onagraceae	Oenothera biennis	Common Evening-primrose	Fields, pastures, roadsides, disturbed areas.	Ranging widely in e. North America and Europe, and scattered in w. North America.
Onagraceae	Oenothera calcicola	Texas Gaura	Dry limestone and caliche soils.	C. and w. TX south to Mexico (COA, DUR, NLE, QRO?, TAM).
Onagraceae	Oenothera capillifolia ssp. berlandieri	Berlandier's Sundrops	Prairies, sandy, rocky, or gravelly open areas, especially calcareous.	KS and s. CO south to e. TX, s. TX, w. TX, and ne. Mexico (COA, NLE, TAM).
Onagraceae	Oenothera capillifolia ssp. capillifolia	Berlandier's Sundrops	Prairies and oak savannas, in sandy and rocky areas, especially calcareous.	OK and NM south through s. LA and s. TX to Mexico; disjunct eastward in MS and AL.
Onagraceae	Oenothera cinerea ssp. cinerea	Woolly Gaura	Sandy flats and dunes.	KS and se. CO south to c. TX, w. TX, and s. NM.
Onagraceae	Oenothera cinerea ssp. parksii	Parks's Gaura	Red sands.	S. TX.
Onagraceae	Oenothera clelandii	Sand Evening-primrose	Sand prairies, riverbanks, dry, sandy disturbed areas.	MI, WI, and MN south to KY and AR; scattered further east as introductions. Reported for SC (Kartesz 1999, 2021), but based on misidentification.
Onagraceae	Oenothera cordata	Heartleaf Evening-primrose	Sandy oak woodlands and savannas.	Endemic in se. TX.
Onagraceae	Oenothera curtiflora	Small-flowered Gaura, Velvety Gaura, Lizardtail Gaura	Sandy fields, disturbed areas, and clearings.	IN and IL west to WA, south to MS, and Mexico (PUE); apparently introduced eastward to MA, TN, GA, and SC (the exact eastern edge of the native distribution uncertain).
Onagraceae	Oenothera curtissii	Florida Evening-primrose	Longleaf pine sandhills, sandy fields, other dry disturbed areas.	Se. SC south to n. peninsular FL, west to s. AL.
Onagraceae	Oenothera demareei	Demaree's Gaura, Ouachita Gaura	Open meadows in sandy loam.	AR west to e. OK and e. TX, centered in the Ouachita Mountains.
Onagraceae	Oenothera drummondii	Drummond's Evening-primrose	Sandy ocean beaches, disturbed areas; eastwards perhaps only introduced or adventive from the western Gulf Coast.	Se. NC south to s. FL, west to se. TX, and south to c. Mexico (BCS, HGO, QRO, SLP, SON, TAB, TAM, VER); occurrences eastwards (from FL, SC, and NC) are sometimes considered adventive, but in habitat are entirely plausible as native occurrences. All inland occurrences should be considered adventive. O. thalassaphila Brandegee is restricted to the southern tip of Baja California.
Onagraceae	Oenothera elata ssp. hirsutissima	Hooker's Evening Primrose	Moist sites in floodplains, fallow fields, and other disturbed areas.	KS, CO, ID, and WA south to e. OK, e. TX, w. TX, NM, AZ, CA, and Mexico.
Onagraceae	Oenothera falfurriae	Royal Evening-primrose	Open, sandy sites.	E. and s. TX.
Onagraceae	Oenothera filiformis	Large-flowered Gaura, Biennial Gaura, Tall Gaura	Glades, prairies, woodlands, shell middens and calcareous hammocks, openings in bottomland forests, disturbed areas, especially over calcareous soils.	MI, WI, MN, SD, and NE, south to AL, MS, LA, and s. TX.
Onagraceae	Oenothera filipes	Threadstalk Gaura	Longleaf pine sandhills, pine flatwoods, barrens, prairies, sandy fields, disturbed areas, and clearings.	SC west to n. TN and s. IN, south to ne. FL and e. and w. LA.
Onagraceae	Oenothera fruticosa var. 1 [brevistipata]	Glandular Sundrops	Calcareous barrens and glades, post oak savannas and flatwoods, other dry to dry-mesic, rocky or sandy woodlands.	S. SC west to MS and north to IL and OH.
Onagraceae	Oenothera fruticosa var. fruticosa	Narrowleaf Sundrops	Piedmont hardpan woodlands, mafic and ultramafic barrens and glades, dry oak-hickory woodlands, longleaf pine sandhills, dry roadsides.	SC north to PA, mostly in the Piedmont.
Onagraceae	Oenothera fruticosa var. goodmanii	Ozark Sundrops	Dry forests and woodlands, glades, rock outcrops.	Ozark Plateau and Ouachita Mountains, and adjacent areas, of AR, OK, MO, and LA.
Onagraceae	Oenothera fruticosa var. microcarpa	Small-fruited Sundrops	Boggy depressions.	E. MD south to e. SC.
Onagraceae	Oenothera fruticosa var. subglobosa	Flatrock Sundrops	Granite flatrocks and domes.	GA to e. AL.
Onagraceae	Oenothera gaura	Biennial Gaura, Northeastern Gaura	Barrens, glades, woodlands, roadsides, streambanks, fields, disturbed areas.	MA and NY west to WI, se. MN, and IA, south to sw. NC, c. GA (Jones & Coile 1988), sc. TN, and c. IL. Reports from the Gulf and Southern Atlantic Coastal Plain appear to be based on misidentification of O. simulans and O. filiformis.
Onagraceae	Oenothera glauca	Glaucous Sundrops	Cliffs, rocky streambanks, moist forests over sedimentary rock.	Cumberland Plateau and Ridge and Valley of KY, TN, and GA.
Onagraceae	Oenothera glaucifolia	False Gaura	Limestone and dolomite glades, disturbed areas.	MO, SD, and se. WY south to sw. AR, e. and c. TX, and NM.
Onagraceae	Oenothera glazioviana	Garden Evening-primrose	Disturbed areas.	This species apparently arose as a garden hybrid, and has been widely cultivated and naturalized nearly worldwide.
Onagraceae	Oenothera grandiflora	Large-flowered Evening-primrose	Woodlands, river-banks, disturbed areas.	Apparently native to Panhandle FL, AL, and MS; scattered elsewhere as a horticultural plant.
Onagraceae	Oenothera grandis	Showy Ragged Evening-primrose	Upland prairies, roadsides, other disturbed (especially sandy) areas.	IL, MO, and NE south to LA, TX, NM, and Mexico (DGO, MIC, TAM).
Onagraceae	Oenothera hartwegii ssp. fendleri	Fendler's Sundrops	Prairies, calcareous grasslands.	Sc. KS, n. NM, and n. AZ south to s. and w. TX and ne. Mexico (COA).
Onagraceae	Oenothera hartwegii ssp. maccartii	MacCart's Sundrops	Grasslands over limestone.	C. and s. TX south to ne. Mexico (COA, NLE, TAM).
Onagraceae	Oenothera hartwegii ssp. pubescens	Hartweg's Sundrops	Open sandy or calcareous areas.	KS, NM, and AZ south through e. OK and c. and s. TX to Mexico (COA, DUR).
Onagraceae	Oenothera heterophylla ssp. heterophylla	Sandhill Evening-primrose	Sandy oak woodlands, also roadsides and other disturbed areas.	Sw. AR and ne. TX south to sw. LA and e. TX.
Onagraceae	Oenothera heterophylla ssp. orientalis	Alabama Evening-primrose	Xeric fluvial sand ridges and barrens, other open, sandy areas.	Endemic to w. AL (Pickens and Sumter counties), sw. AR, and MS (Tombigbee barrens, J. Kees, pers.comm. 2021).
Onagraceae	Oenothera hispida	Sweet Gaura, Scented Gaura, Drummond's Gaura	Prairies, disturbed areas.	AR south to LA, TX, and Mexico (BCN, BCS, COA, DGO, GTO, HGO, MEX, MIC, NLE, OAX, QRO, SLP, TAM, ZAC); disjunct eastward in e. GA (Kartesz 1999), where apparently introduced.
Onagraceae	Oenothera humifusa	Seabeach Evening-primrose, Spreading Evening-primrose	Coastal sand dunes, disturbed sandy areas and lawns on barrier islands.	S. NJ south to s. FL, west to s. LA, along the coast.
Onagraceae	Oenothera hybrida	Blue Ridge Sundrops	Moist forests and woodlands, rocky streambanks, moist roadsides, at moderate to high elevations.	Southern Blue Ridge Mountains of VA south through NC and TN to GA.
Onagraceae	Oenothera jamesii	Trumpet Evening-primrose	Stream banks, other moist areas.	Sc. KS, c. and w. OK, TX, and ne. Mexico (COA, NLE).
Onagraceae	Oenothera kunthiana	Kunth's Evening-primrose	Alluvial flats.	S., c., and w. TX and se. AZ south to se. Mexico.
Onagraceae	Oenothera laciniata	Cutleaf Evening-primrose	Disturbed areas.	ME west to ND, south to s. FL and TX; also in CA.
Onagraceae	Oenothera lindheimeri	Lindheimer's Beeblossom	Coastal prairies; eastwards on roadsides and in other disturbed areas.	W. LA and TX; scattered eastwards (perhaps only as introductions) in e. LA (the Florida parishes), s. MS, s. AL, and Panhandle FL.
Onagraceae	Oenothera linifolia	Threadleaf Sundrops, Flaxleaf Sundrops	Barrens, glades, dry openings, and fields.	C. VA west to s. IL and se. KS, south to Panhandle FL and se. TX. Some of the occurrences east of the Mississippi River may be adventive. Belden et al. (2004) discuss the Virginia occurrence.
Onagraceae	Oenothera macrocarpa ssp. macrocarpa	Missouri Evening-primrose, Wingfruit Evening-primrose, Glade-lily, Missouri-primrose	Glades on calcareous substrates, blackland prairies.	IL west to WY, south to n. AR and c. TX; disjunct in c. TN.
Onagraceae	Oenothera macrocarpa ssp. oklahomensis	Oklahoma Sundrops	In rocky or clayey areas.	S. KS through OK to nc. TX.
Onagraceae	Oenothera mckelveyae	McKelvey's Evening-primrose	Sandy areas.	Se. and s. TX south into ne. Mexico (NLE, TAM).
Onagraceae	Oenothera mexicana	Mexican Evening-primrose	Open, sandy areas.	E., se., and s. TX.
Onagraceae	Oenothera nutans	Nodding Evening-primrose	Roadsides, openings, forest edges, pastures.	ME west to MI, south to n. FL, s. AL, and s. MO.
Onagraceae	Oenothera nuttallii	Nuttall's Evening-primrose	Disturbed areas.	ON west to AB, south to MN, KS, CO, and UT, and introduced eastwards in c. IL, MI, and WI.
Onagraceae	Oenothera oakesiana	Oakes's Evening-primrose	Sandy dunes and sandplains, river-scours, disturbed areas, roadsides.	NS west to MB, south to e. NC (?), VA, PA, n. IN, n. IL, and s. MN.
Onagraceae	Oenothera pallida ssp. latifolia	Pale Evening-primrose	Sandy or rocky areas.	SD and MT south to sc. OK, NM, and UT.
Onagraceae	Oenothera parviflora	Small-flowered Evening-primrose, Northern Evening-primrose	Fields, disturbed areas.	NS west to MB, south to NC, TN, KY, and MO. Reported for GA (GANHP).
Onagraceae	Oenothera patriciae	Plains Gaura	Sandy open areas.	OK south through w. LA, e. TX, and c. TX; historically eastwards in MS, perhaps only as a waif.
Onagraceae	Oenothera perennis	Little Sundrops	Bogs, sphagnous seeps, moist fields.	NS west to MB, south to w. NC, nw. SC, KY, and MO.
Onagraceae	Oenothera pilosella	Midwestern Evening-primrose	Fens, marshes, swamps, moist fields, disturbed areas.	NH west to ON, south to s. VA, KY, n. AL, c. MS, and c. LA; widely cultivated, many occurrences eastward and southward likely represent introductions.
Onagraceae	Oenothera rhombipetala	Longspike Evening-primrose, Sand Evening-primrose	Riverbanks, prairies, disturbed areas.	MI, WI, MN, and ND south to w. LA, TX, and se. NM.
Onagraceae	Oenothera riparia	Riverbank Evening-primrose	Freshwater tidal marshes and freshwater tidal swamp forests, non-tidal swamps, along channel margins, and especially on rises, stumps, fallen logs, and cypress knees.	Se. VA south to se. NC and e. SC. Present in the freshwater tidal portions of the Waccamaw, Northeast Cape Fear, Black, Greater Pee Dee, Cape Fear, Scuppernong, and Alligator rivers. Gramling et al. (2018) discuss the species' occurrence along the Edisto River (Charleston and Colleton counties, SC).
Onagraceae	Oenothera rosea	Rose Evening-primrose	Along creeks and rivers, disturbed areas.	TX south to Mexico and Central America; West Indies.
Onagraceae	Oenothera serrulata	Plains Sundrops	Riverbanks, prairies.	ON west to AB, south to w. KY (Jones 2005), w. AR, s. TX, s. NM, and s. AZ.
Onagraceae	Oenothera sessilis	Prairie Sundrops	Marshy areas.	AR south to w. LA and se. TX.
Onagraceae	Oenothera simulans	Southeastern Gaura, Southern Bee-blossom	Longleaf pine sandhills, other open woodlands, sandy fields, roadsides, primarily in the outer Coastal Plain.	E. NC (Dare County) south to s. FL, west to e. TX, endemic to the Coastal Plain.
Onagraceae	Oenothera sinuosa	Wavyleaf Gaura	Sandy fields, disturbed areas, and clearings.	AR and OK south to s. TX and n. Mexico (BCN, TAM), introduced eastward to SC and FL.
Onagraceae	Oenothera spachiana	Spach's Evening-primrose	Prairies, open woodlands, sandy areas.	Sw. AR and OK south to w. LA and e. TX; disjunct eastwards in MS and AL.
Onagraceae	Oenothera species 1 [australis]		Dunes, other dry sandy areas near the coast.	Along the TX coast, south to TAM.
Onagraceae	Oenothera species 2	Sharp's Sundrops	Oak savannas and prairies of the Eastern Highland Rim.	Known from the Eastern Highland Rim of TN.
Onagraceae	Oenothera speciosa	Showy Evening-primrose, Pink-ladies	Grasslands, prairies, glades, roadsides and fields, also cultivated as an ornamental.	The original distribution obscured by subsequent cultivation and spread, but apparently something like IA and NE south to LA, TX, NM, and Mexico (BCS, CHH, COA, DGO, MOR, NLE, SLP, SON, TAM, ZAC).
Onagraceae	Oenothera suffrutescens	Scarlet Gaura	Sandy or rocky prairies.	ON and BC south to MO, OK, TX, NM, AZ, CA, and to se. Mexico.
Onagraceae	Oenothera suffulta	Kisses	Prairies, roadsides, disturbed areas.	OK south to s. TX.
Onagraceae	Oenothera tetragona	Northern Sundrops	Moist to wet meadows, woodlands, stream margins, river-scours, rocky shoals.	NL (Newfoundland) west to MI, south to e. VA and MO.
Onagraceae	Oenothera tetraptera	Fourwing Evening-primrose	Alluvial flats, disturbed areas.	E. and s. TX southwards into sc. Mexico.
Onagraceae	Oenothera triangulata	Prairie Gaura	Sandy open areas.	Sc. OK south to nc. TX.
Onagraceae	Oenothera triloba	Stemless Evening-primrose	Limestone glades, blackbelt prairies, playas, floodplains; eastwards also in disturbed areas.	MO and KS south through AR, OK, and e. NM to ne. LA, TX, and n. Mexico (BCN, CHH, COA, NLE, TAM); also scattered east of the Mississippi River in both native and apparently introduced populations.
Onagraceae	Oenothera tubicula ssp. tubicula	Texas Sundrops	Grasslands over limestone.	Nc. TX and NM south to sc. and w. TX and Mexico (CHH?, COA, NLE, TAM, and ZAC).
Onagraceae	Oenothera unguiculata	Coastal Sundrops	Longleaf pine sandhill seeps, moist to wet loamy savannas, wet maritime grasslands.	Long Island, NY south to through the mid-Atlantic states to e. SC and e. GA.
Onagraceae	Oenothera villosa ssp. villosa	Hairy Evening-primrose	Prairies, eastwards naturalized in fields, roadsides, other disturbed areas.	ON west to AB, south to AR and TX.
Onagraceae	Onagraceae	Evening-primrose Family