Flora of North America species comparison

erect to prostrate, branched from base.

ascending, cespitose, branched.

pinnate;

stipules ovate, 0.3–0.5 cm, margins entire, apex acute;

petiole to 1.5 cm;

lateral leaflet petiolules to 0.5 mm, terminal leaflet stalk 1–1.5 mm;

leaflets 3, blades obovate to elliptic-lanceolate, 1–2 × 0.5–1.5 cm, base cuneate, lateral veins prominent, ± parallel, ascending, margins dentate distally, apex rounded or retuse, surfaces glabrous or sparsely hairy.

mostly basal, palmate;

stipules ovate, 1 cm, margins entire, apex blunt;

petiole 2–6 cm;

petiolules to 1 mm;

leaflets 3, blades obovate or rhombic, 0.6–1.3 × 0.6–1 cm, base cuneate, veins prominent, margins denticulate, apex rounded or retuse, apiculate, surfaces pale abaxially, glabrous.

axillary or terminal, 5–20-flowered, ovoid or globose, 0.5–0.9 × 0.6 cm;

involucres absent.

terminal or axillary, 8–15-flowered, appearing turned to one side, obconic, 1.3–1.8 × 1.1–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally;

involucres absent.

1–1.5 cm.

curved distally proximal to flowers, 3–9 cm.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

reflexed, 1–1.2 mm;

bracteoles minute.

2.8–3.5 mm;

calyx campanulate, 1.5–2 mm, glabrous, veins 5, tube 0.8–1 mm, lobes unequal, longer than tube, adaxial 2 shorter, orifice open;

corolla pale yellow becoming brown, 2.6–3.2 mm, not or slightly ribbed, banner persistent, spatulate, 2.6–3.2 × 2 mm, apex rounded to broadly acute.

10–13 mm;

calyx purple, campanulate, 5–6 mm, glabrous, veins 10, tube 3.5 mm, lobes equal, subulate, 2 mm, orifice open;

corolla purple, often with white tips, 15 mm, banner obovate, 11–13 × 5–6 mm, apex flared.

stipitate, ellipsoid, 1.5–2 mm, short beaked.

not seen.

1, yellow or pale brown, ellipsoid, 0.9–1 mm, smooth, glossy.

not seen.

= 16, 28, 32.