Flora of the Southeastern United States

Commelina

Spathes lacking contrasting veins; middle petal about the same color as the others; capsules with 3 locules; seeds reticulate or smooth to faintly alveolate.

Spathes lacking contrasting veins; middle petal about the same color as the others; capsules with 3 locules; seeds reticulate or smooth to faintly alveolate.

Commelina

Spathes not at all to slightly falcate (the lower margin straight or very nearly so); upper cyme usually vestigial (rarely well-developed and 1-flowered); seeds smooth to faintly alveolate; peduncles of the spathes with hairs to 0.5 mm long

Spathes not at all to slightly falcate (the lower margin straight or very nearly so); upper cyme usually vestigial (rarely well-developed and 1-flowered); seeds smooth to faintly alveolate; peduncles of the spathes with hairs to 0.5 mm long

Poaceae

Lower glumes of the sessile spikelets rough, rugose, pitted, tuberculate or alveolate between the keels

Lower glumes of the sessile spikelets rough, rugose, pitted, tuberculate or alveolate between the keels

Poaceae

Lower glumes of the sessile spikelets rough, rugose, pitted, tuberculate or alveolate between the keels

Lower glumes of the sessile spikelets rough, rugose, pitted, tuberculate or alveolate between the keels

Mnesithea

Annual; sessile spikelets hemispheric; lower glumes of the sessile spikelet alveolate; [exotic weed]

Annual; sessile spikelets hemispheric; lower glumes of the sessile spikelet alveolate; [exotic weed]

Celtis

Thorns usually paired, often > 10 mm long and then often bearing leaves; styles < 1 mm long; fruit 6-7 (-8) mm in diameter; pyrene to 4 mm long, with low, alveolate-reticulate sculpturing

Thorns usually paired, often > 10 mm long and then often bearing leaves; styles < 1 mm long; fruit 6-7 (-8) mm in diameter; pyrene to 4 mm long, with low, alveolate-reticulate sculpturing

Brassicaceae

Plants fetid; seeds striate or alveolate, dark gray to dark brown or black

Plants fetid; seeds striate or alveolate, dark gray to dark brown or black

Thlaspi

Fresh plant with garlic-like odor; stems terete, glaucous, pubescent basally with spreading hairs; upper stem leaves clasping with auricles wrapping around the stem; siliques 5-8 mm long, 2-4 mm wide, scarcely winged, the wings < 1 mm wide; seeds alveolate

Fresh plant with garlic-like odor; stems terete, glaucous, pubescent basally with spreading hairs; upper stem leaves clasping with auricles wrapping around the stem; siliques 5-8 mm long, 2-4 mm wide, scarcely winged, the wings < 1 mm wide; seeds alveolate

Utricularia

Plants attached (with principal branch systems within the soil); leaves aerial, from near the rooted base of the plant (rosulate or from nodes of stolons), simple, linear or spatulate (sometimes absent); traps 0.2-1.1 mm long, most or all on a plant usually < 1.0 mm long; seeds reticulate-alveolate (also angled in U. resupinata), 0.2-0.4 mm long.

Plants attached (with principal branch systems within the soil); leaves aerial, from near the rooted base of the plant (rosulate or from nodes of stolons), simple, linear or spatulate (sometimes absent); traps 0.2-1.1 mm long, most or all on a plant usually < 1.0 mm long; seeds reticulate-alveolate (also angled in U. resupinata), 0.2-0.4 mm long.

Euphorbia

Seeds distinctly alveolate, 1.3-1.8 mm long; cyathia with the involucre 0.6-0.9 mm long; involucral bracts typically yellow; dichasial bracts rounded to subcordate

Seeds distinctly alveolate, 1.3-1.8 mm long; cyathia with the involucre 0.6-0.9 mm long; involucral bracts typically yellow; dichasial bracts rounded to subcordate

Erigeron

Cauline leaves characteristically narrowly lanceolate-elliptic to lanceolate or oblanceolate; capitulescence usually paniculate-thyrsoid; fruiting receptacles 1.5-2.5 mm wide, weakly but distinctly alveolate (lens), outer to inner florets; phyllaries narrowly ovate, relatively thin and translucent, 0.5-0.8 mm wide, central part yellow-brown with an inconspicuous midvein, loosely strigose with thin-based hairs, never purple-tipped, inserted at apex of peduncle; pistillate florets ca. 20-50, in 2-3 series

Cauline leaves characteristically narrowly lanceolate-elliptic to lanceolate or oblanceolate; capitulescence usually paniculate-thyrsoid; fruiting receptacles 1.5-2.5 mm wide, weakly but distinctly alveolate (lens), outer to inner florets; phyllaries narrowly ovate, relatively thin and translucent, 0.5-0.8 mm wide, central part yellow-brown with an inconspicuous midvein, loosely strigose with thin-based hairs, never purple-tipped, inserted at apex of peduncle; pistillate florets ca. 20-50, in 2-3 series

Erigeron

Cauline leaves characteristically linear to linear-oblanceolate; capitulescence corymbiform to racemiform, less commonly thyrsoid; fruiting receptacles (2-) 2.5-4 (-5) mm wide, not alveolate or sometimes the inner florets barely so; phyllaries linear-lanceolate, relatively thick and opaque, 0.3-0.5 mm wide, green to greenish brown with a narrow, orange-resinous midvein, hispid-hirsute with thick-based hairs, sometimes purple-tipped, inserted on a ring of fused tissue; pistillate florets ca. 40-150, in (2-) 3-6 series

Cauline leaves characteristically linear to linear-oblanceolate; capitulescence corymbiform to racemiform, less commonly thyrsoid; fruiting receptacles (2-) 2.5-4 (-5) mm wide, not alveolate or sometimes the inner florets barely so; phyllaries linear-lanceolate, relatively thick and opaque, 0.3-0.5 mm wide, green to greenish brown with a narrow, orange-resinous midvein, hispid-hirsute with thick-based hairs, sometimes purple-tipped, inserted on a ring of fused tissue; pistillate florets ca. 40-150, in (2-) 3-6 series