Soft Western Rosinweed

Calycadenia mollis grows in the Sierra Nevada foothills from Tuolumne County to Tulare County.

Plants 30–90 cm; self-incom-patible. Stems usually simple, often zigzag-curved, ± hirsute, long-soft-hairy, ± glandular. Leaves mostly alternate, 2–8 cm (often longest at midstems), hirsute, ± long-hairy, ± glandular. Heads usually (3–10+) in dense, cymiform arrays. Peduncular bracts oblanceolate, 3–9 mm (flat, flexible, margins thickened or rolled, hirsute to hispid, usually bristly, especially margins, ± glandular), apices rounded, tack-glands usually 3–6+, confined to margins. Phyllaries 4–6 mm, abaxial faces spreading-hairy (hairs mixed, short, slender hairs and longer bristles), densely glandular, tack-glands usually 0. Paleae 4–6 mm (tack glands usually 0). Ray florets 1–4; corollas yellow, white, or rose, tubes ca. 2 mm (papillate, throats often with red "eyes"), laminae 5–6 mm (central lobes slightly narrower than laterals, nearly symmetric, widest beyond middles, sinuses usually ³/4+ laminae). Disc florets 2–10; corollas yellow to white or rose, ca. 5 mm. Ray cypselae ca. 2.5 mm, usually rough-wrinkled, glabrous or glabrate. Disc cypselae ca. 2.5 mm, ± appressed-hairy; pappi 6–8 usually lanceolate-aristate (often 1–3 shorter, blunt) scales 2–5 mm. 2n = 14.

Hemizonia mollis (A. Gray) A. Gray

Calycadenia mollis is a species of flowering plant in the family Asteraceae known by the common name soft western rosinweed. It is native to a section of central California, from Tuolumne County do northern Tulare County. There are also isolated populations farther north in Nevada County. The plant grows in a number of habitat types in the Central Valley and adjacent Sierra Nevada foothills.

Calycadenia mollis is an annual herb producing an erect, hairy stem up to 90 centimeters tall. The leaves are linear in shape and up to 8 centimeters long, the longest ones often toward the middle of the stem. The inflorescence bears several long clusters of small, very glandular flower heads, each of which has one or more white, yellow, or red triple-lobed ray florets around a center of disc florets. The fruit is an achene; those arising from the disc florets have a pappus of about eight scales.

Calycadenia mollis là một loài thực vật có hoa trong họ Cúc. Loài này được A.Gray mô tả khoa học đầu tiên năm 1868.