Flora of North America species comparison

erect, branched at base and in inflorescence.

stiffly spreading-ascending, slender, broomlike, branched throughout.

opposite near base or alternate throughout, appressed-ascending;

stipular glands present;

blade linear to linear-lanceolate, 8–20 × 0.5–2.1 mm, margins entire or with scattered minute marginal glands, not ciliate, apex acute; 1-nerved.

alternate or proximalmost opposite, proximal leaves spreading, distal leaves appressed-ascending;

stipular glands usually present;

blade linear, 5–20 × 0.3–1.1 mm, margins entire, not ciliate, apex acute.

panicles, with ascending to spreading branches.

diffuse panicles, branches relatively long, stiffly spreading-ascending.

0–3 mm.

6–30 mm, slender.

sepals persistent, lanceolate to ovate, 2.5–5 mm, margins of inner sepals narrowly scarious, conspicuously glandular-toothed, apex acute or acuminate;

petals lemon yellow, oblanceolate or narrowly obcordate, 7–11 mm;

stamens 2–8 mm;

anthers 0.5–1 mm;

staminodia present;

styles distinct, 3–6.5 mm;

stigmas capitate.

sepals deciduous, outer linear-lanceolate, 5.5–9 mm, apex attenuate, inner somewhat broader, shorter, margins narrowly scarious, glandular-toothed, apex awn-tipped;

petals faintly maroon at base, otherwise yellow to yellow-orange throughout, obovate, 8–12 mm;

stamens 5–7 mm;

anthers 0.7–1.1 mm;

staminodia absent;

styles connate nearly to apex, 4.5–7 mm;

stigmas capitate.

ovoid, 2–3 × 2–2.5 mm, apex sharp-pointed, dehiscing readily into 10, 1-seeded segments, segments falling freely, false septa incomplete, false and true septa margins ciliate.

narrowly ellipsoid, 3.5–4.5 × 2.5–3 mm, thin-walled, 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, or only sparsely, ciliate.

1.2–1.9 × 0.7–1.1 mm.

2.5–3 × 0.8–1 mm.

= 36.

= 30.