Show Lower Taxa
Perityle ajoensis, Perityle ambrosiifolia, Perityle angustifolia, Perityle bisetosa, Perityle cochisensis, Perityle congesta, Perityle dissecta, Perityle gilensis, Perityle gracilis, Perityle huecoensis, Perityle intricata, Perityle inyoensis, Perityle lemmonii, Perityle lindheimeri, Perityle megalocephala, Perityle saxicola, Perityle specuicola, Perityle stansburyi, Perityle staurophylla, Perityle tenella, Perityle villosa, Perityle warnockii
Perityle sect. Laphamia
Sida 3: 277. 1968.
Basionym: Undefined sect. Laphamia A. Gray
Revision as of 15:37, 18 September 2019 by FNA>Volume Importer
Perennials or subshrubs (in rock crevices). Involucres funnelform, campanulate, or hemispheric, 5–11 × 3.5–14 mm. Ray florets 0, or 3–5, or 6–18; corollas yellow. Disc florets 9–200; corollas yellow or white. Cypselae linear, linear-lanceolate, oblanceolate or oblong to oblanceolate, flattened, often obscurely rounded or angled on 1 or both surfaces, margins usually inconspicuously calloused and sparsely short-hairy; pappi 0 or of 1–2(–6) equal or subequal, smooth, antrorsely barbellulate, or subplumose bristles 0.5–4.6 mm plus callous crowns or hyaline scales. x = 17.
Distribution
United States, Mexico.
Discussion
Species 29 (22 in the flora).
Selected References
Lower Taxa
Perityle ajoensis, Perityle ambrosiifolia, Perityle angustifolia, Perityle bisetosa, Perityle cochisensis, Perityle congesta, Perityle dissecta, Perityle gilensis, Perityle gracilis, Perityle huecoensis, Perityle intricata, Perityle inyoensis, Perityle lemmonii, Perityle lindheimeri, Perityle megalocephala, Perityle saxicola, Perityle specuicola, Perityle stansburyi, Perityle staurophylla, Perityle tenella, Perityle villosa, Perityle warnockii
Key
1 | Corollas white; rays 0; plants 2–12 cm; Texas (Big Bend area) | > 2 |
1 | Corollas yellow; rays 0, or 3–5, or 6–18; plants (4–)12–75 cm; Arizona, California, Nevada, New Mexico, Texas, or Utah | > 3 |
2 | Pappi 0 or callous crowns (bristles 0); plants densely scabrous-pubescent | Perityle warnockii |
2 | Pappi usually of 2–3(–5) bristles; plants glabrate, minutely hairy, or scabrous-hispidulous | Perityle bisetosa |
3 | Rays 3–5 or 6–18 | > 4 |
3 | Rays usually 0 (sometimes 1–2, reduced, in P. ambrosiifolia) | > 9 |
4 | Leaf blades broadly ovate, ovate-deltate, ovate-lanceolate, or ovate-rhombic; disc florets 11–22; Texas | > 5 |
4 | Leaf blades ± cruciform, subdeltate, or subovate, usually 3-partite or lobed, divided, or pinnate; disc florets 30–200; Arizona, Nevada, New Mexico, Utah | > 6 |
5 | Disc florets 11–13; Hueco Mountains | Perityle huecoensis |
5 | Disc florets 16–22; Edwards Plateau | Perityle lindheimeri |
6 | Leaf blades usually ± cruciform, sometimes lobed or pinnate; New Mexico | Perityle staurophylla |
6 | Leaf blades subdeltate, suborbiculate, or subovate, or deeply lobed, 3-foliolate, or 2–3-pinnate; Arizona, Nevada, Utah | > 7 |
7 | Disc florets 60–80; leaf blades subdeltate, suborbiculate, or subovate, margins serrate or ± lobed; Nevada, Utah | Perityle stansburyi |
7 | Disc florets 75–200; leaf blades 3-foliolate, or 2–3-pinnate; Arizona | > 8 |
8 | Leaf blades 2–3-pinnate (lobes linear to flat-filiform, scarcely broad- ened distally) | Perityle saxicola |
8 | Leaf blades usually 3-foliolate (lobes much broadened distally) | Perityle gilensis |
9 | Plants long-hairy, pilose, or villous | > 10 |
9 | Plants glabrous, or hirtellous, hispidulous, or puberulent, or short-hairy, or short-tomentose | > 15 |
10 | Leaf blades deeply dissected (lobes relatively numerous, irregular) | > 11 |
10 | Leaf blades entire, serrate, or shallow-lobed | > 13 |
11 | Phyllaries 4–6.4(–8) mm (apices acute); disc corolla throats broadly tubu-lar to subfunnelform; pappus bristles delicate | Perityle lemmonii |
11 | Phyllaries 6–9 or (5–)7–13 mm (apices usually attenuate, sometimes acute); disc corolla throats narrowly tubular to narrowly funnelform; pappus bristles moderately stout | > 12 |
12 | Leaf blades 15–30 mm wide; phyllaries 14–20; Arizona | Perityle ambrosiifolia |
12 | Leaf blades 4–15 mm wide; phyllaries 12–15; Texas | Perityle dissecta |
13 | Leaf margins entire or with 1–3 lobes per side (leaves all alternate) | Perityle villosa |
13 | Leaf margins serrate (leaves opposite or alternate) | > 14 |
14 | Pappi usually callous crowns (bristles 0); California | Perityle inyoensis |
14 | Pappus usually of single, delicate bristles 1–3 mm; Arizona, New Mexico | Perityle lemmonii |
15 | Plants densely short-hairy or short-tomentose | > 16 |
15 | Plants glabrous, or hirtellous, hispidulous, or puberulent | > 17 |
16 | Leaf margins serrate; plants densely short-hairy; nw Arizona, Nevada, Utah | Perityle tenella |
16 | Leaf margins usually shallow-crenate; plants densely short-tomentose; sw Arizona | Perityle ajoensis |
17 | Leaf blades 2–8(–15) mm (stems sparsely leafy) | > 18 |
17 | Leaf blades 3–30 mm (stems moderately to densely leafy) | > 20 |
18 | Pappus bristles usually 1–3(–4), rarely 0; se Utah | Perityle specuicola |
18 | Pappus bristles usually 0, sometimes 1–2; California, s Nevada | > 19 |
19 | Heads borne singly or (2–3) in loose, corymbiform arrays; peduncles 10–45(–80) mm; leaf blades usually elliptic, lanceolate, lance-ovate, ovate, or suborbiculate (sometimes linear in var. oligophylla) | Perityle megalocephala |
19 | Heads (2–6) in tight, corymbiform arrays; peduncles 1–10 mm; leaf blades linear | Perityle intricata |
20 | Pappi usually 0, sometimes 1–2 bristles; plants glabrate or puberulent; Texas | Perityle angustifolia |
20 | Pappi usually of 1–3(–6) bristles, sometimes 0; plants glabrous, hirtellous, or short-hairy; Arizona, Nevada | > 21 |
21 | Leaf blades usually deeply divided (lobes 3, relatively broad to linear, usually secondarily lobed, cleft, or parted, often ± cruciform, sometimes almost entire); sc Arizona | Perityle staurophylla |
21 | Leaf blades entire, toothed, or lobed; Arizona, Nevada | > 22 |
22 | Plants 4–12(–15+) cm; petioles 5–30 mm (equal to or longer than blades; leaves usually glabrous); se Arizona | Perityle cochisensis |
22 | Plants 10–30(–45) cm (petioles shorter than blades; leaves hairy); nw Arizona, se Nevada | > 23 |
23 | Leaf blades usually 3-lobed to ± cruciform; nw Arizona, se Nevada | Perityle gracilis |
23 | Leaf blades elliptic, lanceolate, or ovate, usually entire or 2–6-toothed; nw Arizona | Perityle congesta |