Hymenoxys brachyactis

Wooton & Standley

Contr. U.S. Natl. Herb. 16: 192. 1913.

Common names: East view rubberweed tall bitterweed
Treatment appears in FNA Volume 21. Treatment on page 443. Mentioned on page 435, 436.

Biennials or perennials, 30–60 cm (monocarpic; sometimes with sparingly branched, woody caudices). Stems 1–4(–8), green throughout, branched distally, glabrous or sparsely hairy. Leaves: blades simple or lobed (lobes 3–9), glabrous, gland-dotted; mid leaves lobed (lobes 3–7, terminal lobes 0.8–1 mm wide). Heads (7–)40–150(–250) per plant, in paniculiform to corymbiform arrays. Peduncles 1.2–2 cm, glabrous or sparsely hairy. Involucres usually urceolate, sometimes campanulate, 6–8 × 5–6 mm. Phyllaries in 2 series, unequal; outer 8(–9), basally connate 1/2 their lengths, lanceolate, 4–6 mm, apices acuminate to acute; inner 8(–10), obovate, 4.5–5 mm, apices mucronate. Ray florets 8(–9); corollas yellow, 7–8.5 × 3–4(–4.8) mm. Disc florets 25–60+; corollas 3.1–4.2 mm. Cypselae narrowly obpyramidal, 2.1–2.5 mm; pappi of 5(–7) obovate to lanceolate, aristate scales 2.5–3 mm.


Phenology: Flowering Jul–Sep.
Habitat: Roadsides, open areas, edges of pine forests
Elevation: 2000–2500 m

Discussion

Selected References

None.

Lower Taxa

None.