Flora of North America species comparison

erect, glabrous.

usually erect or decumbent, rarely prostrate, glabrous.

usually without basal rosette at anthesis; alternate;

sessile or subsessile;

basal blade obovate or spatulate to narrowly elliptic, cauline oblanceolate, spatulate-elliptic, or linear, (7–)15–40(–70) × 1.5–8 mm, base often cuneately narrowed and petiolelike proximally, acute to obtuse distally, apex usually rounded proximally, acute to obtuse distally, surfaces glabrous.

whorled, at least proximally, to alternate distally;

sessile or subsessile, rarely with narrowed petiolelike base to 1 mm;

blade linear, elliptic, lanceolate, or obovate, 3–25 × 1–5 mm, base cuneate, margins sometimes erose, appearing toothed, apex often acute, sometimes obtuse or rounded proximally, surfaces glabrous.

in cymose panicles, each stem with to 110 racemose branches, 1.8 × 0.7–1.1 cm, ± flat-topped, 2.5–15 ×3–15 cm;

central ones nearly sessile or peduncle to 2 cm, lateral ones subsessile or peduncle to 2(–3) cm;

bracts usually persistent, lanceolate-ovate.

narrowly cylindric, 3–12(–15) × 0.4–0.8 cm;

peduncle to 9 cm (elongate);

bracts deciduous, lanceolate-ovate.

narrowly winged, (1–)1.3–2.3 mm, glabrous.

to 0.5 mm (to 1 mm in fruit), glabrous.

bright yellow, drying green or yellow-brown, 3–3.5 mm;

sepals decurrent on pedicel, ovate to lanceolate-ovate, 1–3 mm;

wings ovate, elliptic-obovate, obovate, or spatulate, 2.5–3.5 × 1–1.4 mm, apex acuminate to cuspidate, involute;

keel 2–2.5 mm, crest 2-parted, with (1 or)2 or 3 lobes on each side.

white or greenish white, 2.5–3.2 mm;

sepals ovate to elliptic, 1–1.3 mm;

wings suborbiculate, broadly elliptic, or obovate, 2–3 × 1.5–2.5 mm, apex obtuse to bluntly rounded;

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

subglobose, 0.8–1 × 0.8–1 mm, margins not winged.

subglobose to broadly ellipsoid, 1.7–4 × (1.2–)2–3 mm, margins not winged.

0.5–0.7 mm, densely pubescent;

aril 0–0.2 mm.

1–2.5 mm, pubescent;

aril 0.5–1.5 mm, lobes 1/3–2/3 length of seed.

= 64, 68.

= ca. 28, 96.