Flora of North America species comparison

erect, branches 1–several from base, unbranched proximal to inflorescence.

ascending to erect, branched from base.

proximal 4–10 pairs opposite, distal alternate, erect to spreading;

stipular glands absent;

blade of proximal leaves spatulate, central and distal elliptic, oblanceolate, or obovate, 15–25 × 3–7 mm, margins entire, not ciliate, apex acute to apiculate.

proximalmost opposite, distal alternate, imbricate throughout, proximal leaves spreading to ascending, distal closely appressed;

stipular glands absent;

blade awl-shaped, 5–10 × 0.5–1 mm, margins entire, distalmost narrowly scarious, not ciliate, apex of proximal leaves sharp-pointed, distal with short, slender terminal awn.

corymbs.

panicles;

bracts not ciliate.

1–10 mm.

3–15 mm.

sepals persistent, lanceolate-ovate, inner shorter, broader, thinner than outer, outer sepals 2–4 mm, margins not scarious, inner sepals usually with a few small, sessile glands along margin distal to middle, rarely eglandular, outer ones entire, apex acute to acuminate;

petals yellow, obovate (sometimes notched at apex), 3–5.5 mm;

stamens 1.2–3 mm;

anthers 0.5–1 mm;

staminodia absent;

styles distinct, 1–2 mm;

stigmas capitate.

sepals persistent, lanceolate to ovate, 4.5–7 mm, margins broadly scarious, entire, or sparsely delicately toothed or, in age, ± lacerate, not glandular-toothed, apex conspicuously awn-tipped;

petals yellow, with or without dark red base, obovate, 8–12 mm;

stamens 5 mm;

anthers 1–1.6 mm;

staminodia absent;

styles connate to 0.3–1.1 mm of apex, 2.7–6.3 mm;

stigmas capitate.

globose, carpels flattened or ± concave abaxially, 1.3–1.8 × 2–2.5 mm, apex depressed, dehiscing freely into 10, 1-seeded segments, segments falling freely, false septa nearly complete, proximal margins usually sparsely and inconspicuously few-ciliate.

broadly ovoid, 2.7–3.5 × 2.8–3.6 mm, apex rounded, dehiscing into 5, 2-seeded segments, segments persistent plant, false septa entirely hyaline, or with very narrow, uniform, distal cartilaginous portion, margins tomentose near apex.

1–1.5 × 0.6–0.9 mm.

2–2.7 × 1–1.2 mm.

= 36.

= 30.