Flora of North America species comparison

erect, branched from base and throughout, bushy.

erect, branched at base and in inflorescence.

alternate, spreading to ascending;

stipular glands absent;

blade linear, 10–28 × 1–1.5 mm, margins entire or sparsely toothed on distal leaves, not ciliate, apex acute.

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.

dense panicles.

panicles, with ascending to spreading branches.

2–7 mm.

0–3 mm.

sepals tardily deciduous, lanceolate, 5–9 mm, margins narrowly scarious, conspicuously glandular-toothed, apex acute to acuminate;

petals yellow, obovate, 6–11 mm;

stamens 4–6 mm;

anthers 0.4–0.8 mm;

staminodia absent;

styles connate nearly to apex, 2.5–4 mm;

stigmas capitate.

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.

ovoid, 3.5–4.4 × 2.7–3.5 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 or only minutely ciliate.

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.

2.6–3.1 × 1–1.3 mm.

1.2–1.9 × 0.7–1.1 mm.

= 30.

= 36.