Flora of North America species comparison

erect to ascending, unbranched proximally, few to many branches above middle, conspicuously sulcate.

spreading to erect, few-branched.

proximal 0–13 pairs opposite (often fallen at anthesis), distal alternate, appressed-ascending;

stipular glands usually present, very rarely absent;

blade linear to narrowly lanceolate, 7–30 × 1–3 mm, margins entire, distal leaves not ciliate, apex acute to subulate;

midrib prominent, marginal nerves less conspicuous.

alternate, spreading;

stipular glands moderately developed at proximal nodes, absent on distal nodes;

blade linear, 5–30 × 0.5–1.5 mm, margins entire, not ciliate, apex acute.

open panicles;

bracts glandular-toothed, not ciliate.

panicles.

1.3–4.7 mm.

5–13 mm.

sepals persistent, lanceolate, (3.1–)3.6–5(–7.3) mm, inner sepals more delicate than outer, shorter, margins not scarious, all very conspicuously glandular-toothed, apex acuminate, central and marginal veins conspicuous;

petals pale yellow, obovate, 5–10 mm;

stamens 3.3–5.7 mm;

anthers 0.3–0.7 mm;

staminodia absent;

styles connate 0.2–1.8 mm at base, 2–4.5 mm;

stigmas capitate.

sepals deciduous, linear-lanceolate to lanceolate, 4–12 mm, margins narrowly scarious, glandular-toothed, apex acute to acuminate;

petals yellow to orange salmon, faintly maroon banded near base, obcordate, 7–12 mm;

stamens 4–5 mm;

anthers 1–1.5 mm;

staminodia absent;

styles connate nearly to apex, 3–4 mm;

stigmas dark, capitate.

globose, 2.5–3.3 × 2.1–3 mm, apex rounded to acute, dehiscing freely into 10, sharp-pointed, 1-seeded segments;

segments persistent on plant, false septa incomplete, margins prominently ciliate.

ovoid, 3.3–4 × 2.6–3.1 mm, apex obtuse, dehiscing into 5, 2-seeded segments, segments persistent on plant, false septa complete, proximal part membranaceous, not terminating in loose fringe, distal part cartilaginous, margins not ciliate.

1.6–2.1 × 0.8–1.1 mm.

2.5–2.7 × 1.1 mm.

= 30.

= 30.