Flora of the Southeastern United States

Leaves 2-5 cm long, 0.3-1.0 cm wide; corolla lobes erect, creamy yellow to greenish white, 7-10 mm long; plant 1-4 dm tall, erect; [of dryish pinelands of the Coastal Plain, e. NC to s. FL, west to FL Panhandle]

Leaves 2-30 cm long, 0.5-11 cm wide (not simultaneously < 5 cm long and < 1 cm wide); corolla lobes reflexed, either orange-red, purple, pink, greenish-yellow, or green, 5-15 mm long; plant 1-10 dm tall or long, erect, decumbent, or prostrate; [collectively widespread].

Leaves cordate-clasping at base, 3-10 cm wide, 1-2.5× as long as wide; stem and leaves glabrous and usually also glaucous; flowers primarily pink-colored.

Plant prostrate or decumbent; leaves blue-green with conspicuous pink veins throughout; inflorescence usually with numerous axillary umbels present (occasionally plants with a solitary terminal umbel); [dry pinelands of the southeastern coastal plain; NC to FL, w. to e. LA]

Plant erect, not falling over and laying on the ground; leaves green, not blue-tinted, with pink midribs but lacking conspicuous secondary or tertiary pink veins; umbels solitary and terminal or with a few umbels concentrated terminally or in the upper most leaf axils; [collectively widespread]

Leaves usually spreading (although also sometimes upright or oriented downward), with strongly undulate margins; peduncles long, the terminal umbel usually strongly exerted past the upper leaves; [widespread in our region]

Leaves usually ascending, without (or with only slightly) undulate margins; peduncles short, slightly exerted, the terminal umbels usually not surpassing the upper-most leaves; [south to sc. OH, s. IN, s. IL, MO, and OK]

Leaves cuneate, rounded, truncate, subcordate, or cordate at base; rarely cordate-clasping; 0.5-6 cm wide, (1-) 1.5-6× as long as wide; stem and leaves pubescent to glabrate (or glabrous in A. meadii); flowers cream, green, or pink-colored (if pink colored then leaves lanceolate and acuminate-tipped).

Plants erect to ascending; [collectively widespread].

Corolla lobes 12-15 mm long, greenish-yellow (sometimes suffused with some purple); flowers 3-6 (-8) per umbel; hoods strongly inward-arching over the gynostegium, almost touching at their tips.

Corolla lobes 6-9 mm long, reddish-purple, pink, pale green, or greenish-yellow; flowers > 7 per umbel; hoods erect, or slightly spreading at their tips.

Leaves lanceolate, acuminate at the apex; corolla reddish purple to pink, the lobes 7-9 mm long; [of wetlands, Coastal Plain and very rarely inland]

Flowers primarily green-colored; plants usually with solitary terminal umbels nodding; [upland prairies; rare from s. MO and s. IL n. to nw. IN and sw. IA]

Flowers primarily pink-colored; plants often with more than one umbel and usually oriented upright; [wet habitats and seepages of the Coastal Plain; NJ to FL, w. to TX]

Leaves orbicular to oblong, rounded to truncate at the apex; corolla pale green to creamy yellowish-green (sometimes suffused with some purple), the lobes 6-9 mm long; [of dry habitats, widespread]

Stems densely hirtellous to velutinous; leaf surfaces densely hirtellous to velutinous; hoods bronze to yellow or orange-yellow; plants 40-70 (-200) cm tall

Stems puberulent to thinly tomentose or glabrate; leaf surfaces thinly tomentose or puberulent to glabrate; hoods green to cream, occasionally purple-suffused; plants (10-) 20-125 cm tall

Hood with a broadly falcate horn, green; corolla lobes laxly to strongly reflexed, contacting the pedicelor not; leaf blades cordate to clasping; [TX, OK, KS and westwards]

Hood without a horn, green to cream and sometimes suffused purple; corolla lobes strongly reflexed, appressed to the pedicel; leaf bases cuneate to rounded; [widespread]