Flora of North America species comparison

erect, branched from base and throughout, bushy.

erect or shortly decumbent at base, becoming erect, branched from near base.

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.

usually only proximalmost opposite, sometimes to midstem, distal alternate, erect to ± spreading;

stipular glands absent;

blade of proximal leaves narrowly to broadly elliptic-oblanceolate, 10–15 × 1.5–2.5 mm, margins entire, not ciliate, apex subacute to acuminate; 1-nerved.

dense panicles.

slender thyrses.

2–7 mm.

1–4 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, linear-lanceolate to lanceolate, 3–5.3 mm, margins not scarious, inner ones conspicuously glandular-toothed, outer entire or very sparsely glandular-toothed, apex acute to acuminate;

petals yellow, oblanceolate, 4–7 mm;

stamens 3–5 mm;

anthers 1–1.5 mm;

staminodia absent;

styles distinct, 1.5–3 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.

triangular-ovoid to broadly ovoid, 2.5–3.5 × 2.7–3.5 mm, apex obtuse, somewhat tardily dehiscing into 10, 1-seeded segments, segments persistent on plant, false septa incomplete, proximal margins ciliate.

2.6–3.1 × 1–1.3 mm.

2–2.5 × 1.1–1.3 mm.

= 30.

= 26.