Flora of North America species comparison

erect to ascending, unbranched proximally, few to many branches above middle, conspicuously sulcate.

ascending to erect, branched at base and in inflorescence.

proximal 0–13 pairs opposite (often fallen at anthesis), distal alternate, appressed-ascending;

stipular glands usually present, very rarely absent;

blade linear to narrowly lanceolate, 7–30 × 1–3 mm, margins entire, distal leaves not ciliate, apex acute to subulate;

midrib prominent, marginal nerves less conspicuous.

alternate or proximal leaves opposite, divergent to ascending;

stipular glands usually present, sometimes absent;

blade linear, 8–17 × 0.5–1.3 mm, margins entire, with widely spaced glandular hairs, apex acute.

open panicles;

bracts glandular-toothed, not ciliate.

open panicles.

1.3–4.7 mm.

2–12 mm.

sepals persistent, lanceolate, (3.1–)3.6–5(–7.3) mm, inner sepals more delicate than outer, shorter, margins not scarious, all very conspicuously glandular-toothed, apex acuminate, central and marginal veins conspicuous;

petals pale yellow, obovate, 5–10 mm;

stamens 3.3–5.7 mm;

anthers 0.3–0.7 mm;

staminodia absent;

styles connate 0.2–1.8 mm at base, 2–4.5 mm;

stigmas capitate.

sepals persistent, lanceolate to narrowly lanceolate, 4–7.5 mm, margins narrowly scarious or not, inner sepals abundantly glandular-toothed, outer sparsely toothed, apex narrowly acute;

petals yellow-orange to salmon with maroon base, broadly obovate, 10–17 mm;

stamens 4–8 mm;

anthers 1–1.8 mm;

staminodia absent;

styles connate to within 0.2 mm of apex, 4–8 mm;

stigmas capitate.

globose, 2.5–3.3 × 2.1–3 mm, apex rounded to acute, dehiscing freely into 10, sharp-pointed, 1-seeded segments;

segments persistent on plant, false septa incomplete, margins prominently ciliate.

ovoid, 3–4 × 2.5–3.2 mm, apex depressed, dehiscing completely into 5, 2-seeded segments (very easily crushed), segments persistent on plant, false septa incomplete, proximal margins terminating in loose fringe.

1.6–2.1 × 0.8–1.1 mm.

2–2.8 × 0.9–1.3 mm.

= 30.

= 30.