Flora of North America species comparison

ascending, branched at base, herbaceous throughout.

terete, ridged, or sulcate.

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.

alternate, opposite, or whorled;

stipular glands present or absent;

blade margins entire or glandular-toothed, sometimes ciliate.

open panicles.

5–10 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.

homostylous;

sepals persistent or deciduous, margins scarious or not, glandular-toothed or not;

petals yellow, sometimes with maroon at base;

staminodia present or absent;

styles distinct or connate nearly to apex;

stigmas usually capitate, rarely linear.

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.

dehiscing into 10, 1-seeded segments or 5, 2-seeded segments;

false septa incomplete to complete.

1.5–3 × 0.9–1.3 mm.

tricolpate or multiporate.

= 30.