Flora of North America species comparison

suffrutescent basally, erect, 50–150 cm, glabrous.

erect, 30–90 cm, strigose to strigose-sericeous.

unifoliolate;

stipules ovate to ovate-lanceolate, not decurrent on stem, 4–7 mm;

blade obovate to elliptic, 50–150 mm, length 1.5–2.5 times width, surfaces glaucous, strigose abaxially, glabrous-punctate adaxially.

unifoliolate;

stipules sometimes absent, setaceous, not decurrent on stem, 1–2 mm;

blade obovate to spatulate or oblanceolate, 30–80 mm, length 2.2–3(–4) times width, surfaces strigose abaxially, glabrous adaxially.

12–22-flowered, terminal, subterminal, or lateral, 10–50 cm;

bracts persistent, cordate-auriculate, 5–8 mm.

5–24-flowered, terminal, subterminal, or lateral, 10–20(–30) cm;

bracts caducous, linear, 2–3 mm.

calyx broadly cylindrical, 10–15 mm, lobes triangular-lanceolate, glabrous;

corolla bright yellow, faintly red-lined, 17–25 mm.

calyx broadly cylindrical, 12–15 mm, basally truncate, lobes triangular-lanceolate, glabrous or slightly puberulous;

corolla bright yellow, with prominent reddish lines to strongly red-tinted, 20–25 mm.

30–45 × 10–20 mm, glabrous.

25–40(–50) × 10–14 mm, glabrous.

= 16.

= 16.