Perityle staurophylla
SouthW. Naturalist 4: 205. 1959.
Perennials or subshrubs, 15–40 cm (often forming dense clumps, densely leafy); glabrous or puberulent. Leaves: petioles 10–25(–40) mm; blades usually deeply divided, 5–30 × 7–25 mm, lobes 3, relatively broad to linear, usually secondarily lobed, cleft, or parted, often ± cruciform, sometimes almost entire. Heads usually in corymbiform arrays, sometimes borne singly, 6–7.5 × 4.5–6 mm. Peduncles 4–25 mm. Involucres campanulate. Phyllaries 13–16(–22), sublanceolate, 3.4–4 × 0.7–1.1(–1.8) mm. Ray florets 0, or 4–8; corollas yellow, laminae oblong, 3.6–4.8 × 1.2–2.2 mm. Disc florets 40–50; corollas yellow, tubes 1.5–1.6 mm, throats subtubular to narrowly funnelform, 1.5–2 mm, lobes 0.6–0.8 mm. Cypselae oblanceolate, 1.8–2.3(–2.7) mm, margins thin-calloused, short-hairy; pappi of 2–3(–6) bristles 1.8–2.5 mm (at least the longer), often plus minute, hyaline scales.
Discussion
Varieties 2 (2 in the flora).
Selected References
None.
Key
| 1 | Leaves: lobes usually linear to filiform; ray florets 0 (n end of San Andres Mountains) | Perityle staurophylla var. homoflora |
| 1 | Leaves: lobes relatively broad to filiform; ray florets 4–8 (not n end of San Andres Mountains) | Perityle staurophylla var. staurophylla |