Flora of North America species comparison

erect to decumbent, 4–40 cm, hirsute-pilose.

sometimes ligneous basally, mostly decumbent to prostrate, 15–100 cm, minutely and sparsely strigillose.

unifoliolate;

stipules sometimes absent, decurrent on mid and distal stems, lanceolate-auriculate or triangular, with 2 distinct, persistent, triangular distal lobes, (3–)5–10 mm or absent (in var. blumeriana);

subsessile;

blade elliptic to oblong or linear-lanceolate, 10–80 mm, length 4–8 times width, surfaces strigose to sparsely rusty-pilose.

3-foliolate;

stipules caducous, narrowly triangular, setaceous, 0.5–1 mm;

leaflet blades narrowly obovate to oblong or elliptic-oblong, 7–15(–35) mm, length 1.5–3.5(–6) times width, surfaces strigose abaxially, glabrous adaxially.

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

bracts persistent, linear-triangular.

(1–)4–8-flowered, terminal, subterminal, or lateral, 1–6(–10) cm;

bracts caducous, subulate.

calyx broadly cylindrical, 5–8 mm, lobes triangular-lanceolate, glabrous or slightly puberulous to rusty-pilose;

corolla bright yellow, 9–11 mm.

calyx campanulate, 3–5.5 mm, lobes triangular, strigose;

corolla yellow, often red- or orange-tinged or red-lined, 7–11 mm.

7–27(–36) × 5–11 mm, glabrous.

yellowish, 12–20 × 4–8 mm, minutely strigillose.

= 32.