Flora of North America species comparison

erect, branched from base and throughout, bushy.

erect or spreading, branching 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.

proximal in whorls of 4, distal alternate, or mostly whorled or mostly alternate, spreading to ascending;

stipular glands present;

blade lanceolate to oblanceolate, 10–20 × 2–6 mm, margins entire, of distal leaves ciliate, apex deltate-acute to obtuse.

dense panicles.

panicles;

bracts ciliate.

2–7 mm.

0–1 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, 2–3.5 mm, margins of inner sepals scarious, glandular-toothed, apex acute;

petals lemon yellow, oblanceolate to narrowly obcordate, 2.5–6 mm;

stamens 2–5 mm;

anthers 0.3–0.7 mm;

staminodia usually present, sometimes absent;

styles distinct, 1.6–3 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.

broadly ovoid, 1.5–2.5 × 2–2.5 mm, apex sharp-pointed (easily crushed), readily dehiscing into 10, 1-seeded segments, segments falling freely, false septa rudimentary, margins of true septa usually ciliate.

2.6–3.1 × 1–1.3 mm.

1–1.5 × 0.6–1 mm.

= 30.

= 36.