Flora of North America species comparison

prostrate to laxly erect, glabrous or very sparsely pubescent, hairs incurved.

laxly erect, decumbent, or prostrate, pubescent to subglabrous, hairs incurved.

sessile or subsessile;

blade elliptic, obovate, ovate, or scalelike, (1.5–)2–5.9(–8) × 0.8–3.5 mm, base cuneate or rounded, apex acute, surfaces sparsely pubescent to subglabrous, hairs incurved.

sessile or subsessile;

blade ovate, elliptic, or obovate, 7–50(–60) × 3–20(–26) mm, base usually rounded to acute, sometimes cuneate, apex rounded to acute, surfaces pubescent, hairs incurved.

terminal, sometimes appearing axillary (from branches proximal to racemes of major branches with vegetative portions highly reduced), reduced to 1–3(–5) flowers, 0.5–1 × 0.7–1.9 cm;

peduncle 0–0.2 cm;

rachis not thorn-tipped;

bracts persistent, ovate, lanceolate, or linear.

terminal or leaf-opposed, 1–4(–5) × 1.8–3 cm;

rachis not thorn-tipped;

peduncle 0–1 cm;

bracts early deciduous, linear to lanceolate.

(0.6–)1–3(–3.6) mm, usually glabrous, rarely sparsely pubescent.

(2.5–)3.5–8.5 mm, sparsely pubescent or glabrous.

pink or purple with pale margins, keel sometimes cream, distally greenish yellow, (2.4–)2.9–5.1(–5.4) mm;

sepals: lateral ones deciduous, elliptic, ovate, or obovate, (1.2–)1.6–3(–3.2) mm, upper sepal persistent, ovate, (1–)1.2–2.4 mm, glabrous, margins sometimes sparsely ciliate proximally;

wings obovate, (2.2–)2.5–4.6(–5.1) × 1.8–2.8 mm, glabrous or sparsely pubescent proximally;

keel (1.7–)2.3–3.6 mm, sac incurved-puberulent in distal 1/2, beak obscure, deltate, bluntly rounded, or linear to oblong, (0–)0.1–0.7 × (0–)0.1–0.5 mm, glabrous.

usually pink, rarely white, keel distally yellow (fading white), (2.5–)9–14.5 mm, cleistogamous and semi-cleistogamous flowers mostly 2.5–5 mm, intergrading with chasmogamous flowers;

sepals deciduous, elliptic, 4–6.5 mm, pubescent or glabrous;

wings obovate, (7.5–)8–12 × 2.5–6 mm, glabrous or sparsely pubescent;

keel (7–)8–11 mm, sac glabrous (sometimes proximally ciliate), beak oblong, (1.2–)1.6–3 × 0.7–1 mm (mostly absent in cleistogamous flowers), usually notched or contorted abaxially, rarely subentire, pubescent.

ellipsoid-obovoid, sometimes broadly so, 1.9–3.6 × 1.6–2.9 mm, base cuneate to rounded, margins narrowly and evenly winged or slightly expanded apically, glabrous or sparsely pubescent apically.

ellipsoid to ovoid, 7.3–10.5 × 4.5–7 mm, in cleistogamous and semi-cleistogamous flowers 4.5–8 mm, base obtuse, rounded, or subtruncate, margins with narrow, entire or slightly erose wing, glabrous, margins sometimes ciliolate.

(1.7–)1.9–3.2 mm, body, excluding aril and pubescence, 1–1.9 mm, densely pubescent;

aril (0.3–)0.4–0.7 mm, lobes often highly reduced, nearly absent to 1/6 length of seed.

3.5–6 mm, densely pubescent;

aril 1.7–4 mm, less than 1/2 length of seed.

or semi-cleistogamous flowers often present terminally, on much reduced scale-leaved lateral branches from proximal (or distal) leaf axils, or terminally on leafy branches that are often leaf-opposed.

= 18.