Flora of North America species comparison

erect, branched from base and throughout, bushy.

spreading to suberect, branched at 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.

opposite near base or alternate throughout, divergent to widely ascending;

stipular glands present;

blade linear to narrowly linear-lanceolate, 10–30 × 1–3 mm, margins entire, ciliate, apex apiculate.

dense panicles.

panicles;

bracts with irregular scarious margins.

2–7 mm.

3–8 mm, stout.

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 deciduous, inner sepals somewhat shorter than outer, regularly and delicately glandular-toothed, outer sepals ovate or obovate, 6–8 mm, margins widely scarious, undulate or crenate, with sessile gland near apex of each crenation, apex conspicuously aristate;

petals yellow, grading to reddish near base, obovate, 9–18 mm;

stamens 5–8 mm;

anthers 1–2 mm;

with or without staminodia;

styles connate nearly to apex, 5–10 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, 3.5–4.5 × 3–3.8 mm, apex obtuse, dehiscing into 5, 2-seeded segments, segments persistent on plant, false septa incomplete, united more than halfway, proximal part membranaceous with basal, 5-sided cartilaginous plates, distal part cartilaginous, constituting more than 1/2 of false septum, margins not ciliate.

2.6–3.1 × 1–1.3 mm.

2.3–2.8 × 1–1.3 mm.

= 30.

= 30