Compilation
Oxybaphus pauciflorus

Stems 1–many, erect to decumbent, few or highly branched, sparsely to densely leafy in basal 1/2 or throughout, 0.8–15 dm, glabrous to puberulent basally in 2 lines or throughout, hairs often awned, or stems villous and often viscid, or sometimes hirsute, hair types often mixed, spreading pubescent. Leaves ascending to spreading at 10–90°; petiole 0–4 cm; blade green to glaucous blue-gray, linear-lanceolate to ovate-lanceolate, ovate, or deltate, 1–11 × 0.6–2.5 cm in lanceolate leaves, 2–9 × 1–6.5 cm in ovate leaves, thin and fleshy to thick and coriaceous, base cuneate to round, truncate, or cordate, apex acute, obtuse, or round, surfaces glabrous or viscid-puberulent, viscid-villous, or hirsute. Inflorescences axillary or terminal, few branched, ± evenly forked and open, or, when axillary, often consisting only of single involucres (and then flowers commonly cleistogamous); peduncle 1–25 mm, puberulent with curled hairs, hispid, villous, or viscid-villous, crosswalls of hairs pale; involucres pale green or sometimes blushed with purple when young, widely bell-shaped, 4–7 mm in flower, 5–15 mm in fruit, sparsely to densely pubescent with small curled hairs or long spreading hairs, often viscid, 50–80% connate, lobes ovate, triangular-ovate, broadly ovate, or occasionally round. Flowers (1–)3 per involucre; perianth white, pink, or deep red-violet, 0.8–1.5 cm. Fruits brown to dark brown with pale tan, brown, or dark brown ribs, obovoid to narrowly obovate and tapering at both ends, 3.5–5.5 mm, pubescent with tufted spreading hairs 0.1–0.5 mm, with or without minute glandular hairs; ribs round or round-angled, (0.3–)0.7–1.5 times width of sulci, 0.5–1 times as wide as high, with tall shelflike tubercles (eastern part of range), smooth or somewhat rugose or moderately tuberculate (western part of range); sulci with prominent, pale, shelflike tubercles (eastern), minutely rugose or with small low warts (western). 2n = 58.