Flora of North America species comparison

erect, branched at base and in inflorescence.

erect, branched from base and throughout, bushy.

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, 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.

panicles, with ascending to spreading branches.

dense panicles.

0–3 mm.

2–7 mm.

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 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.

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.

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.

1.2–1.9 × 0.7–1.1 mm.

2.6–3.1 × 1–1.3 mm.

= 36.

= 30.