Agnorhiza bolanderi

(A. Gray) W. A. Weber

Phytologia 85: 19. 1999.

Basionym: Balsamorhiza bolanderi A. Gray Proc. Amer. Acad. Arts 7: 356. 1868
Synonyms: Wyethia bolanderi (A. Gray) W. A. Weber
Treatment appears in FNA Volume 21. Treatment on page 105. Mentioned on page 104.

Plants (10–)15–30 cm. Stems decumbent, seldom distally branched. Cauline leaves: blades oblong, ovate, rounded-deltate, or suborbiculate, 4–12 cm, bases ± truncate or cordate, margins entire, faces glabrous (shining, finely gland-dotted, ± glutinous). Heads held among or beyond leaves. Involucres ± campanulate, 15–25(–30+) mm diam. Outer phyllaries ovate to ovate-lanceolate, 10–40+ mm (seldom surpassing ray corollas). Ray florets (7–)8–12, laminae (12–)20–30(–35) mm. Cypselae 7–9 mm, glabrous; pappi 0 or coroniform, 0.1–0.3 mm. 2n = 38.

Phenology: Flowering Mar–Apr(–May).
Habitat: Openings in chaparral
Elevation: 600–800 m


Agnorhiza bolanderi is known only from the foothills of the Sierra Nevada, where it evidently grows only on serpentine soils.

Selected References


Lower Taxa