Calycadenia hooveri G. D. Carr

Calycadenia hooveri resembles variants of Calycadenia pauciflora; it is more closely related to C. villosa (G. D. Carr 1975b). Calycadenia hooveri is known only from the Sierra Nevada foothills of Calaveras, Mariposa, and Stanislaus counties.

Plants 10–60 cm; self-compatible. Stems branched (branches relatively many, distal, filiform, flexible, minutely scabrous, glandular). Leaves mostly alternate, 1–6(–8) cm, ± thinly hispidulous and ± long-hairy (especially proximal margins and adaxial faces). Heads borne singly or in ± spiciform arrays (1–4 per node). Peduncular bracts subclaviform, 1–5 mm (hispidulous, sometimes ± pectinate-fimbriate), apices rounded, tack-glands 1 (terminal). Phyllaries 2.5–3.5 mm, abaxial faces ± hispidulous (hairs scattered, stout), ± shaggy long-hairy distally, especially margins, minutely glandular, tack-glands (0–)1 (terminal). Paleae 3–5 mm (vestiture similar to phyllaries, tack-glands 0). Ray florets (0–)1(–2); corollas white, tubes ca. 2 mm, laminae 2–3.5 mm (central lobes smaller than laterals, widest at bases, symmetric, sometimes 2-partite, laterals weakly asymmetric, sinuses ca. ²/3 laminae). Disc florets 1–2; corollas white, 2.5–3.5 mm. Ray cypselae 1.5–2.5 mm, smooth to rugose, glabrous. Disc cypselae 2–3 mm, ± appressed-hairy; pappi of 6–13 lanceolate-aristate, scales 1.5–2.5 mm. 2n = 14.

Calycadenia hooveri is a California species of flowering plant in the family Asteraceae known by the common name Hoover's western rosinweed. It is endemic to a short portion of the western Sierra Nevada foothills, where it grows in rocky areas in the hills along from Amador County to Madera County.

Calycadenia hooveri là một loài thực vật có hoa trong họ Cúc. Loài này được G.D.Carr mô tả khoa học đầu tiên năm 1975.