Narrowleaf Laphamia

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.

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.

Laphamia intricata Brandegee, Bot. Gaz. 27: 450. 1899; L. megalocephala S. Watson subsp. intricata (Brandegee) D. D. Keck; Perityle megalocephala (S. Watson) J. F. Macbride var. intricata (Brandegee) A. M. Powell

Monothrix intricata (Brand.) Rydberg
Laphatnia intricata Brand. Bot. Gaz. 27: 450. 1899.
A suffruticose perennial, intricately branched from a woody base; stems numerous, 1.5-2 dm. high, scabrous-puberulent; leaves mostly alternate, linear-oblanceolate, about 5-8 mm. long, 1 mm. wide, obtuse, hispidulous-scabrous; heads terminating the branches; involucre about 3 mm. high and 5 mm. broad; bracts linear-oblanceolate, boat-shaped below, scabrouspuberulent, acute; ray-flowers none; disk-flowers about 30; corollas bright-yellow, 2 mm. long; tube glandular, slightly shorter than the campanulate throat; achenes oblong, hirsutulous; pappus wanting.
Type locality: Pahrump, Nevada. Distribution: Nevada.