Flora of North America species comparison

ascending, branched at base, herbaceous throughout.

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

alternate or sometimes proximal leaves opposite, appressed-ascending;

stipular glands present (conspicuous);

blade linear, 7–20 × 0.6–1.5 mm, margins entire or distal leaves sparsely glandular-toothed, ciliate, apex acute; 1-nerved.

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.

open panicles.

elongate panicles.

5–10 mm.

0–4 mm.

sepals falling tardily, lanceolate, 4–7 mm, margins of inner sepals scarious, glandular-toothed, apex acute to acuminate, puberulent at least on midrib;

outer 3-nerved;

petals yellowish orange to salmon, with maroon or reddish base, obcordate or broadly obovate, 9–15 mm;

stamens 4–7 mm;

anthers 0.6–1.4 mm;

staminodia absent;

styles connate nearly to apex, 3–7 mm;

stigmas dark, 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-ellipsoid, 3.5–4 × 2.5–5 mm, apex obtuse, dehiscing into 5, 2-seeded segments, segments persistent on plant, false septa complete, proximal margin not terminating in loose fringe, distal part cartilaginous, margins ciliate.

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.

1.5–3 × 0.9–1.3 mm.

1–1.4 × 0.5–0.7 mm.

= 30.

= 36.