Flora of North America species comparison

very short, tufted, branched.

solitary, erect, slender, usually unbranched.

cauline, crowded near base;

stipules well developed;

petiole 1–6 cm;

leaflets (3 or)5–9, blades 8–20 × 2–9 mm, adaxial surface glabrous.

cauline;

stipules 7–9 mm;

petiole to 1 cm;

leaflets 6 or 7, blades 10–40 × 4–10 mm, adaxial surface glabrous.

dense, 3–16-flowered, 1–8 cm;

flowers spirally arranged, crowded.

4–16 cm;

flowers ± whorled or not.

1–8(–10) cm;

bracts persistent, straight, 2–3 mm.

2–6 cm;

bracts deciduous, 8–10 mm.

0.3–1.5 mm.

5–6 mm.

6–8 mm;

calyx abaxial lobe entire or shallowly cleft, ± 6 mm, adaxial lobe 2-toothed, 3 mm, less than 1/2 as long as abaxial;

corolla bright blue, banner spot white or yellow, keel glabrous.

8–10(–12) mm;

calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 3–5 mm, adaxial lobe 2-toothed, 3–8 mm;

corolla whitish to dull blue (at least in bud), often fading to pale yellow, banner glabrous abaxially, keel glabrous, tip sometimes exserted.

not undulate, 1 cm, thinly pilose to coarsely hirsute.

1.5–2.5 cm, white-hairy, dark when dry.

persistent, disclike, sessile.

deciduous, petiolate.

1 or 2, smooth.

3 or 4, 4–5 mm.