Flora of North America species comparison

erect, 30–65 cm, glabrate to sparsely stellate-pubescent.

cauline;

petiole 0.5–1.5 mm;

blade linear, 10–21(–26) × 0.9–2 mm, surfaces stellate-pannose, lateral veins obscure abaxially.

alternate, opposite, or whorled, usually estipulate, sometimes stipulate (Tuberaria), stipules caducous, petiolate or sessile;

blade 1- or 3- [5-]veined from base, not lobed, sometimes scalelike, margins entire [crenate, serrate], sometimes revolute and/or undulate.

terminal, broad panicles, branches spreading, usually curved, stellate-pannose; chasmogamous flowers 1–3 per branch; cleistogamous 0.

usually corymbose, cymose, paniculate, racemose, thyrsiform, or umbellate, seldom solitary flowers.

5–13 mm, stellate-pubescent with no or sparse glandular hairs;

bracts 1–2.5 × 0.3–0.5 mm.

present or absent;

bracts present or absent.

chasmogamous or cleistogamous;

sepals persistent or tardily falling, 3–5;

petals usually caducous [marcescent], usually 3–5, sometimes 0 in cleistogamous flowers, imbricate, distinct, crumpled in bud, green, dark red, pink, purple, red, white, or yellow;

stamens (3–)5–150+;

filaments distinct or basally connate;

ovaries superior, 2-, 3-, 5-, or 6–12-carpellate;

placentation parietal;

styles 0 or 1;

stigmas 1 or 3;

ovules orthotropous [anatropous], bitegmic, crassinucellate.

capsular, dehiscence loculicidal [septifragal].

(1–)3–800+ per capsule, often with thin outer integument.

flowers: outer sepals linear, 1.3–2(–2.8) × 0.3 mm, inner sepals 4.7–7(–8) × 2–3 mm, apex acuminate or acute, calyx stellate-pubescent, hairs to 1 mm;

petals obovate, 8–12 × 6–8 mm;

capsules 3.5–4.3 × 2.3–2.7 mm, glabrous.