Perityle intricata

(Brandegee) Shinners

SouthW. Naturalist 4: 204. 1959.

Common names: Desert rock daisy
Endemic
Basionym: Laphamia intricata Brandegee Bot. Gaz. 27: 450. 1899
Synonyms: Laphamia megalocephala subsp. intricata (Brandegee) D. D. Keck Perityle megalocephala var. intricata (Brandegee) A. M. Powell
Treatment appears in FNA Volume 21. Treatment on page 327. Mentioned on page 325, 326.

Perennials or subshrubs, 13–35(–40) cm; hirtellous. Leaves: petioles usually 0 mm; blades linear, 3–8(–15) × 0.2–1 mm; margins usually entire, rarely 1–3-lobed. Heads (2–6) in tight, corymbiform arrays, 4–6.5 × 3.5–5.5 mm. Peduncles 1–10 mm. Involucres campanulate. Phyllaries 3–4, linear or lanceolate to oblanceolate, 5(–5) × 0.5–1.2 mm. Ray florets 0. Disc florets 24–36; corollas yellow, tubes 0.5–1 mm, throats tubular, 1–1.2, lobes 0.4–0.6 mm. Cypselae oblanceolate, (1.5–)2.2–2.8 mm; margins moderately calloused, moderately to densely coarse-ciliate; pappi usually 0, sometimes of 1–2 bristles 1–2 mm, usually plus crowns of cilialike scales, rarely callous crowns. 2n = 38 ± 2.


Phenology: Flowering spring–fall (depending on rains).
Habitat: Limestone crevices, dry mountain slopes and canyons
Elevation: 800–1700 m

Discussion

Perityle intricata has been treated as a subspecies or variety of P. megalocephala. Now that more collections are available for study, it is evident that this taxon should be treated as a species. The linear leaves, tightly aggregated heads on relatively short peduncles, and densely coarse-ciliate cypsela margins separate it from P. megalocephala with its broader leaves, loosely aggregated heads on longer peduncles, and short-hairy cypsela margins. Where the two distributions overlap (southern Nye County), they are reported to appear distinct in the field, with P. intricata occurring at lower elevations than P. megalocephala.

Selected References

None.

Lower Taxa

None.
... more about "Perityle intricata"
Sharon C. Yarborough +  and A. Michael Powell +
(Brandegee) Shinners +
Laphamia intricata +
Desert rock daisy +
Calif. +  and Nev. +
800–1700 m +
Limestone crevices, dry mountain slopes and canyons +
Flowering spring–fall (depending on rains). +
SouthW. Naturalist +
Laphamia megalocephala subsp. intricata +  and Perityle megalocephala var. intricata +
Perityle intricata +
Perityle sect. Laphamia +
species +