Flora of North America species comparison

erect, unbranched proximal to inflorescence or few-branched at base.

ascending to erect, branched at base and in inflorescence.

proximalmost opposite, distalmost alternate, sometimes opposite nearly to inflorescence, erect to ascending;

stipular glands absent;

blade narrowly elliptic to oblanceolate, 8–27 × 1.2–5.6 mm, margins entire, not ciliate, apex acute;

internal venation shown by transmitted light.

alternate or proximal leaves opposite, divergent to ascending;

stipular glands usually present, sometimes absent;

blade linear, 8–17 × 0.5–1.3 mm, margins entire, with widely spaced glandular hairs, apex acute.

panicles.

open panicles.

0–5 mm.

2–12 mm.

sepals persistent, lanceolate, 2–3 mm, margins not scarious, entire, or inner and rarely outer sparsely glandular-toothed, apex sharp-pointed;

petals yellow, obovate, 4–7 mm;

stamens 3 mm;

anthers 0.5–1 mm;

staminodia absent;

styles distinct, 1.5–2.5 mm;

stigmas capitate.

sepals persistent, lanceolate to narrowly lanceolate, 4–7.5 mm, margins narrowly scarious or not, inner sepals abundantly glandular-toothed, outer sparsely toothed, apex narrowly acute;

petals yellow-orange to salmon with maroon base, broadly obovate, 10–17 mm;

stamens 4–8 mm;

anthers 1–1.8 mm;

staminodia absent;

styles connate to within 0.2 mm of apex, 4–8 mm;

stigmas capitate.

turbinate, 2–3 × 2–2.3 mm, apex acute or obtuse, dehiscing freely into 10, sharp-pointed 1-seeded segments, segments persistent on plant, false septa incomplete, proximal margins sparsely but conspicuously ciliate.

ovoid, 3–4 × 2.5–3.2 mm, apex depressed, dehiscing completely into 5, 2-seeded segments (very easily crushed), segments persistent on plant, false septa incomplete, proximal margins terminating in loose fringe.

1.3–1.8 × 0.6–0.9 mm.

2–2.8 × 0.9–1.3 mm.

= 36.

= 30.