Flora of North America species comparison

stiffly spreading-ascending, branched at base and distal to middle.

erect-ascending, unbranched or branched from base, unbranched proximal to inflorescence, conspicuously ribbed distally.

alternate or proximalmost opposite, crowded at base, appressed-ascending;

stipular glands absent;

blade oblanceolate to lanceolate or linear-lanceolate, 8–17 × 1.2–2.3 mm, margins entire, not ciliate, apex apiculate.

proximal 5–20 pairs opposite, distal opposite or alternate, erect to spreading;

stipular glands absent;

blade elliptic to oblanceolate or obovate, 15–35 × 4–10 mm, margins entire, not ciliate, apex obtuse or acute.

few-flowered racemes.

elongate panicles.

(5–)20–30(–60) mm.

0–4 mm.

sepals persistent, lanceolate to lance-ovate, 4.5–7 mm, margins narrowly scarious, inner sepals conspicuously toothed, outer ones very coarsely glandular-toothed, sometimes sparsely so, apex acuminate or narrowly acute;

petals lemon yellow, obovate, 9–15 mm;

stamens 5–7 mm;

anthers 1–2 mm;

staminodia absent;

styles connate to within 0.8–3 mm of apex, 5.7–9 mm;

stigmas capitate.

sepals persistent, lanceolate to ovate, 1.5–3.5 mm, margins not scarious, eglandular or inner with a few delicate small marginal glands, apex acute or apiculate;

petals pale yellow, obovate, 2.7–4.6 mm;

stamens 1.5–2 mm;

anthers 0.3–0.7 mm;

staminodia absent;

styles distinct, 1.2–2 mm;

stigmas capitate.

ovoid (distinctly longer than broad), 3.5–4.6 × 2.5–3.1 mm, apex sharp-pointed, dehiscing completely into 5, 2-seeded segments (very easily crushed), segments persistent on plant, false septa incomplete, proximal margins terminating in loose fringe, cartilaginous plates at base of segments poorly developed.

globose, carpels convex abaxially, 1.3–1.9 × 1.8–2.3 mm, apex depressed, dehiscing freely into 10, 1-seeded segments, segments falling freely, false septa nearly complete, proximal margins not ciliate.

2.5–3 × 0.9–1.2 mm.

1–1.4 × 0.5–0.7 mm.

= 30.

= 36.