Flora of North America species comparison

stiffly ascending-spreading, few to many-branched.

spreading to ascending or erect, branched from base.

alternate, appressed;

stipular glands present at basal nodes or throughout;

blade linear, 7–20 × 0.5–l.9 mm, margins entire, not ciliate, apex aristate.

proximalmost opposite, middle and distal alternate, closely imbricate, proximal leaves spreading-ascending, distal strongly appressed;

stipular glands absent;

blade linear-lanceolate, 5–9 × 0.5–1.2 mm, margins entire, distal leaves sparsely ciliate, apex short-awned;

midrib cartilaginous.

racemes.

panicles;

bracts ciliate.

3–15 mm.

2–11 mm.

sepals deciduous, lanceolate to narrowly ovate, 4–7 mm, margins scarious, delicately glandular-toothed, apex aristate;

petals yellow to yellow-orange throughout, oblanceolate to narrowly obovate, 5–10 mm;

stamens (3–)4–7 mm;

anthers 0.4–1 mm;

staminodia present or absent;

styles connate nearly to apex, 2–5.7 mm;

stigmas green, capitate.

sepals persistent, ovate, 4.2–6.1 mm, margins broad, purplish, scarious, prominently toothed distally, not glandular-toothed, apex conspicuously awn-shaped;

petals yellow, with or without dark red base, obovate, 6.5–8 mm;

stamens 5 mm;

anthers 0.6–1.2 mm;

staminodia absent;

styles connate to within 0.3–0.8 mm of apex, 2–4.3 mm;

stigmas capitate.

ovoid, 3.2–4.5 × 2.5–3.4 mm, relatively thick-walled and with characteristic thickened areas at apex in region of true septa, 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 ciliate.

broadly ovoid, 2.6–3 × 2.9–3.3 mm, apex rounded, dehiscing into 5, 2-seeded segments, segments persistent on plant, false septa hyaline, with cartilaginous portion conspicuously broader near base, proximal margin appressed-pilose, otherwise glabrous.

2–3 × 0.8–1.3 mm.

2–2.6 × 1.1–1.5 mm.

= 30.