Eriophyllum lanatum var. arachnoideum

(Fischer & Avé-Lallemant) Jepson

Man. Fl. Pl. Calif., 1119. 1925.

Basionym: Bahia arachnoidea Fischer & Avé-Lallemant Index Seminum (St. Petersburg) 9: 63. 1842
Treatment appears in FNA Volume 21. Treatment on page 359. Mentioned on page 357, 358, 362.

Perennials (clumped; ± taprooted or roots branched). Proximal leaves mostly alternate; blades rhombic to oblanceolate, pinnately lobed (usually in distal part of leaf, lobes 3–5, oblong or triangular), ultimate margins entire or dentate, revolute, abaxial faces loosely cobwebby-woolly, adaxial glabrate. Heads 2–4 per array or borne singly. Peduncles mostly 3–10 cm. Involucres 9–15 mm diam. Ray florets 8–15; laminae 8–10 mm. Cypselae (1.8–)2–3.2(–4) mm; pappi 0–0.2 mm. 2n = 16, 32.

Phenology: Flowering Apr–Jul.
Habitat: Ocean bluffs, inland sites, with conifers
Elevation: 0–700 m


Variety arachnoideum merges with var. grandiflorum in coastal northern California, where intermediates with pappi to 1.3 mm may be found. Variety arachnoideum is morphologically similar to var. croceum; their distributions are disjunct.

Selected References


Lower Taxa

Dale E. Johnson +  and John S. Mooring +
(Fischer & Avé-Lallemant) Jepson +
Bahia arachnoidea +
0–700 m +
Ocean bluffs, inland sites, with conifers +
Flowering Apr–Jul. +
Man. Fl. Pl. Calif., +
Undefined (tribe Undefined) subtribe Eriophyllinae +
Eriophyllum lanatum var. arachnoideum +
Eriophyllum lanatum +
variety +