Flora of North America species comparison

erect, glabrous.

erect, usually glabrous, rarely subglabrous.

alternate;

sessile or subsessile;

blade spatulate proximally to linear or narrowly elliptic distally, (5–)10–20(–40) × (0.5–)1–3(–5) mm, base acute or obtuse, apex acute to acuminate, surfaces glabrous.

whorled, sometimes alternate distally;

sessile or subsessile, or with narrow petiolelike base to 2 mm;

blade mostly linear, to oblanceolate, spatulate, obovate, or narrowly elliptic, especially proximally, 8–35(–50) × 1–5(–7) mm, base cuneate to acute, apex rounded to obtuse or acute, surfaces glabrous.

capitate to densely cylindric, (0.5–)1–2(–4) × 0.5–1.4 cm;

peduncle 0.3–2.5(–3) cm;

bracts subpersistent to tardily deciduous, subulate.

capitate to densely cylindric, 1–3.5(–6) × 1–1.7 cm;

peduncle 0.5–3(–5) cm;

bracts persistent, narrowly lanceolate-ovate.

0.4–1.5 mm, glabrous.

2–2.4 mm, glabrous.

usually pink, purple, or reddish purple, rarely white, sometimes greenish tinged, sepals sometimes pink or white, 4–6 mm;

sepals oval, elliptic-ovate, or lanceolate, 1–3 mm;

wings ovate to broadly elliptic, (2.6–)4.5–6.3 × (1–)2.5–3.5 mm, apex obtuse to broadly rounded, sometimes minutely apiculate, rarely acute;

keel 2.5–3 mm, crest 2-parted, with 2–4 lobes on each side.

usually purple or pink, rarely white, wings and distal keel sometimes green-tinged, sepals often pink, 4–6 mm;

sepals ovate, 0.8–1.5 mm, sometimes ciliolate;

wings ovate to deltate, 3.5–6 × 2.7–4 mm, apex acuminate, often strongly cuspidate;

keel 2.8–3.5 mm, crest 2-parted, with 2 or 3 entire or 2-fid lobes on each side.

usually with flattened, sterile base, cuneate-subglobose, 2.5–3 × 2–2.5 mm, margins not winged (sometimes with raised rim).

with winged, stipelike base, strongly oblique, subglobose, 2–2.5 × 1.8–2.1 mm, margins not winged.

1.3–1.7 mm, pubescent;

aril 1–1.3 mm, lobes usually (1/2–)2/3 to ± length of seed, rarely minute.

1.1–1.5 mm, short-pubescent;

aril 0.9–1.1 mm, lobes usually 2/3+ length of seed, rarely shorter or absent.

= 36, 40.