Perityle bisetosa
SouthW. Naturalist 4: 204. 1959.
Perennials or subshrubs, 2–12 cm; glabrate, glabrous, minutely hairy, or scabrous-hispidulous. Leaves: petioles (0–) 1–7 mm; blades lanceolate, lanceovate, ovate, or suborbiculate, 4–8 × 2–8 mm, margins entire, serrate, or shallow-lobed. Heads usually borne singly (often obscured by the dense leaves), 7–8 (–10) × 3.5–7 mm. Peduncles 0–3 mm. Involucres narrowly campanulate. Phyllaries 8–10 (–12), linear to broadly or narrowly lanceolate, 4.5–6 × 1–2 mm. Ray-florets 0. Disc-florets 11–17; corollas white, tubes 0.8–1 mm, throats tubular to subfunnelform, 1.5–3 mm, lobes 0.8–1 mm. Cypselae oblong to oblanceolate, 1.8–2.2 (–2.5) mm, margins notably calloused, glabrous; pappi of 2–3 (–5) ± flattened bristles 1.5–2.3 mm.
Distribution
Tex., Mexico
Discussion
Varieties 4 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Petioles 0–2 mm (glabrate); leaf margins entire or subserrate | Perityle bisetosa var. bisetosa |
| 1 | Petioles 2–7 mm (glabrous, minutely hairy, or scabrous-hispidulous); leaf margins usually serrate or lobed | > 2 |
| 2 | Leaves glabrous or minutely hairy | Perityle bisetosa var. appressa |
| 2 | Leaves scabrous-hispidulous | Perityle bisetosa var. scalaris |