Flora of North America species comparison

erect, 70–250 cm, strigose.

erect to ascending, 15–50(–80) cm, sparsely, loosely strigose.

3-foliolate;

stipules absent;

leaflet blades linear to linear-lanceolate or elliptic-lanceolate, 50–130(–180) mm, length 7–10 times width, surfaces strigose abaxially, glabrous adaxially.

unifoliolate;

stipules lanceolate-auriculate or triangular, decurrent on mid and distal stems, with 2 distinct lobes, (3–)5–13 mm;

blade linear, linear-lanceolate or -oblanceolate, oblong, or elliptic, narrower distally, 45–100 mm, length (2.5–)4–10 times width, surfaces strigose abaxially, glabrous adaxially.

4–12-flowered, terminal or subterminal, 15–40 cm;

bracts persistent, linear-triangular, minute.

(1 or)2–5(–12)-flowered, terminal, subterminal, or lateral, 6–25 cm;

bracts persistent, subulate-triangular.

calyx broadly cylindrical, truncate basally, 4–6 mm, lobes triangular, shiny-glabrous;

corolla pale yellow with prominent reddish purple lines, 18–20 mm.

calyx broadly cylindrical, 6–9 mm, lobes triangular-lanceolate, glabrous or slightly puberulous;

corolla bright yellow, 8–12 mm.

straight, (40–)50–70 × (10–)15–20 mm, sparsely strigose or glabrescent.

15–25(–30) × 7–10 mm, glabrous.

= 16.

= 32.