Flora of the Southeastern United States

Hymenophyllaceae

Rhizomes filiform, < 0.5 mm in diameter, glabrous or with sparse light-colored hairs; indusium ("involucre") bivalvate (deeply divided into 2 flaps); receptacle not exserted from between the deeply bilobed indusium; margins of finest leaf divisions with sharp teeth pointing towards the division apex (at 20× magnification)

Rhizomes filiform, < 0.5 mm in diameter, glabrous or with sparse light-colored hairs; indusium ("involucre") bivalvate (deeply divided into 2 flaps); receptacle not exserted from between the deeply bilobed indusium; margins of finest leaf divisions with sharp teeth pointing towards the division apex (at 20× magnification)

Hymenophyllaceae

Rhizomes moderately stout, 0.8-1.5 mm in diameter, densely clad with dark-colored hairs; indusium ("involucre") tubular or funnelform, sometimes slightly 2-lobed; receptacle long and whiplike, exserted from the mouth of the tubular (slightly bilobed) indusium; margins of finest leaf divisions entire or with obscure crenations (at 20× magnification)

Rhizomes moderately stout, 0.8-1.5 mm in diameter, densely clad with dark-colored hairs; indusium ("involucre") tubular or funnelform, sometimes slightly 2-lobed; receptacle long and whiplike, exserted from the mouth of the tubular (slightly bilobed) indusium; margins of finest leaf divisions entire or with obscure crenations (at 20× magnification)

Melanthiaceae

Leaves slightly or not at all keeled, 2-12 mm wide; plant solitary, from a bulbous or semibulbous base; inner tepals (petals) 3-6 or 7-12 mm long, clawed or not, bearing either a single (sometimes obscure to essentially invisible) gland near the base or a bilobed gland well above the base.

Leaves slightly or not at all keeled, 2-12 mm wide; plant solitary, from a bulbous or semibulbous base; inner tepals (petals) 3-6 or 7-12 mm long, clawed or not, bearing either a single (sometimes obscure to essentially invisible) gland near the base or a bilobed gland well above the base.

Melanthiaceae

Inner tepals (petals) 6-12 mm long, clawed, with a single unlobed or bilobed gland borne well above the base; [of calcareous habitats].

Inner tepals (petals) 6-12 mm long, clawed, with a single unlobed or bilobed gland borne well above the base; [of calcareous habitats].

Melanthiaceae

Tepals 7-12 mm long, the gland bilobed; [calcareous Appalachians of PA, VA, WV, and NC; s. OH; s. MO; and northwards]

Tepals 7-12 mm long, the gland bilobed; [calcareous Appalachians of PA, VA, WV, and NC; s. OH; s. MO; and northwards]

Poaceae

Lowest lemmas unawned (or with an awn to 1.2 mm long); upper glumes truncate or bilobed, sometimes short-awned from between the lobes

Lowest lemmas unawned (or with an awn to 1.2 mm long); upper glumes truncate or bilobed, sometimes short-awned from between the lobes

Lepidium

Silicles bilobed, 1.3-1.7 mm long, reticulate, strongly notched at the apex; splitting into two halves

Silicles bilobed, 1.3-1.7 mm long, reticulate, strongly notched at the apex; splitting into two halves

Paysonia

Siliques not compressed, or slightly to somewhat compressed at right angles to the plane of the septum (angustiseptate), nearly globose, subglobose, pyriform, or slightly bilobed, < 2× as wide as thick; valves variously glabrous, pubescent with only a single type of trichome, or pubescent with a mixture of large, simple, bulbous-based trichomes and smaller branched trichomes; flowers white (to pale lavender) or yellow.

Siliques not compressed, or slightly to somewhat compressed at right angles to the plane of the septum (angustiseptate), nearly globose, subglobose, pyriform, or slightly bilobed, < 2× as wide as thick; valves variously glabrous, pubescent with only a single type of trichome, or pubescent with a mixture of large, simple, bulbous-based trichomes and smaller branched trichomes; flowers white (to pale lavender) or yellow.

Paysonia

Petals white or pale lavender (the claws yellowish); siliques pyriform, depressed globose, or slightly bilobed; septum (of the silique) perforate or nearly absent (rarely complete).

Petals white or pale lavender (the claws yellowish); siliques pyriform, depressed globose, or slightly bilobed; septum (of the silique) perforate or nearly absent (rarely complete).

Paysonia

Siliques densely pubescent, depressed globose or slightly bilobed; valves (of the silique) glabrous on the interior; styles hirsute

Siliques densely pubescent, depressed globose or slightly bilobed; valves (of the silique) glabrous on the interior; styles hirsute

Silene

Middle cauline leaves opposite; petals entire, slightly erose, bilobed, 2-cleft, or 8+-cleft.

Middle cauline leaves opposite; petals entire, slightly erose, bilobed, 2-cleft, or 8+-cleft.

Silene

Petals entire, bilobed, or 2-cleft; plants 0.5-8 dm tall, perennial or annual; [either exotic weeds occurring mostly in disturbed sites, or native in forests, woodlands, or rock outcrops].

Petals entire, bilobed, or 2-cleft; plants 0.5-8 dm tall, perennial or annual; [either exotic weeds occurring mostly in disturbed sites, or native in forests, woodlands, or rock outcrops].

Portulaca

Petals deeply bilobed; stamens > 40; [of sandstone (Altamaha Grit) outcrops in s. GA]

Petals deeply bilobed; stamens > 40; [of sandstone (Altamaha Grit) outcrops in s. GA]

Portulaca

Petals not bilobed; stamens usually < 30; [collectively widespread and of various habitats].

Petals not bilobed; stamens usually < 30; [collectively widespread and of various habitats].

Gonolobus

Upper surface of corolla lobes multi-colored, generally dark maroon to brownish near the base and green to yellowish near the tips at anthesis (or uniformly yellowish-green to neon green in rare mutants), pubescent or glabrous; laminar dorsal anther appendage darkly purplish or maroonish tinted, apex bilobed to emarginate; [se. VA south to c. peninsular FL, west to s. MS and inland to nw. GA; very rarely west of the Mississippi River (in AR)]

Upper surface of corolla lobes multi-colored, generally dark maroon to brownish near the base and green to yellowish near the tips at anthesis (or uniformly yellowish-green to neon green in rare mutants), pubescent or glabrous; laminar dorsal anther appendage darkly purplish or maroonish tinted, apex bilobed to emarginate; [se. VA south to c. peninsular FL, west to s. MS and inland to nw. GA; very rarely west of the Mississippi River (in AR)]

Convolvulaceae

Styles 1 (sometimes with 2 stigmas, or a bilobed stigma); leaves cordate, sagittate, or truncate at the base, and (mostly) ovate in outline.

Styles 1 (sometimes with 2 stigmas, or a bilobed stigma); leaves cordate, sagittate, or truncate at the base, and (mostly) ovate in outline.

Apiaceae

Corolla white; rays 5-20; plants 1-15 dm tall; fruits either 4-5× as long as wide (narrowly oblong), or 0.5-1.5× as long as wide ovoid, spherical, or strongly bilobed and wider than long; [native or naturalized herbs of upland or wetland situations].

Corolla white; rays 5-20; plants 1-15 dm tall; fruits either 4-5× as long as wide (narrowly oblong), or 0.5-1.5× as long as wide ovoid, spherical, or strongly bilobed and wider than long; [native or naturalized herbs of upland or wetland situations].

Plantae

Leaves palmately lobed or bilobed (3, 5, or more veins diverging from the base of the leaf blade into the lobes)

Leaves palmately lobed or bilobed (3, 5, or more veins diverging from the base of the leaf blade into the lobes)

Bouteloua

Central awns of lemmas not flanked by membranous lobes; upper glumes not bilobed; [section Bouteloua]

Central awns of lemmas not flanked by membranous lobes; upper glumes not bilobed; [section Bouteloua]

Bouteloua

Central awns of lemmas flanked by 2 membranous lobes (1-1.5 mm long); upper glumes bilobed; [section Triplathera]

Central awns of lemmas flanked by 2 membranous lobes (1-1.5 mm long); upper glumes bilobed; [section Triplathera]

Plantae

Leaves 1- or 2-foliolate, if 1-foliolate then deeply notched and appearing bilobed (Bauhinia, which is also keyed in Key G).

Leaves 1- or 2-foliolate, if 1-foliolate then deeply notched and appearing bilobed (Bauhinia, which is also keyed in Key G).

Plantae

Leaves 1-foliolate (bilobed)

Leaves 1-foliolate (bilobed)

Apiaceae

Fruits 1.5-6 mm long, ovoid to subglobose, or strongly bilobed and then wider than long

Fruits 1.5-6 mm long, ovoid to subglobose, or strongly bilobed and then wider than long

Apiaceae

Fruits distinctly wider than long, 4-7 mm wide, bilobed, each lobe (mericarp) subglobose; outer flowers of each umbellet radiant (the petals larger to the outside of the umbellet)

Fruits distinctly wider than long, 4-7 mm wide, bilobed, each lobe (mericarp) subglobose; outer flowers of each umbellet radiant (the petals larger to the outside of the umbellet)

Cuscuta

Infrastaminal scales 1/2-1/3 as long as the corolla tube, apex truncate to bilobed; styles 0.1-0.7 mm long

Infrastaminal scales 1/2-1/3 as long as the corolla tube, apex truncate to bilobed; styles 0.1-0.7 mm long

Chloris

Lemma apices not truncate, instead acute to obtuse, sometimes bilobed.

Lemma apices not truncate, instead acute to obtuse, sometimes bilobed.

Chloris

Lemma apices acute to obtuse, but not bilobed (or only the sterile or staminate lemma partly lobed); spikelets divergent, appressed, or otherwise.

Lemma apices acute to obtuse, but not bilobed (or only the sterile or staminate lemma partly lobed); spikelets divergent, appressed, or otherwise.

Chloris

Lemma apices conspicuously bilobed (both the lower bisexual and upper staminate); spikelets pectinate, diverging at a wide angle from branch axes

Lemma apices conspicuously bilobed (both the lower bisexual and upper staminate); spikelets pectinate, diverging at a wide angle from branch axes

Chloris

Lowest lemmas linear to narrowly lanceolate, 2.9-4.0 mm long; sterile or staminate lemmas bilobed for a portion of their length; sheaths glabrous; culms to 50 cm

Lowest lemmas linear to narrowly lanceolate, 2.9-4.0 mm long; sterile or staminate lemmas bilobed for a portion of their length; sheaths glabrous; culms to 50 cm

Plantae

Leaves 1-, 2-, or 3-foliolate (leaves with less than 4 leaflets, usually appearing bilobed or trifoliolate)

Leaves 1-, 2-, or 3-foliolate (leaves with less than 4 leaflets, usually appearing bilobed or trifoliolate)

Plantae

Leaves bilobed; fruit a legume

Leaves bilobed; fruit a legume