Verbesina rothrockii

B. L. Robinson & Greenman

Proc. Amer. Acad. Arts 34: 541. 1899.

Treatment appears in FNA Volume 21. Treatment on page 111. Mentioned on page 107.

Plants 30–60+ cm (perennating bases ± erect, internodes not winged). Leaves all or mostly opposite (distal sometimes alternate); blades ovate-deltate or rhombic to lance-elliptic, 3–5 × 1–3 cm, bases subtruncate to cuneate, margins coarsely toothed to subentire, apices obtuse to acute, faces ± hirtellous to scabrellous. Heads borne singly. Involucres ± hemispheric, 10–15+ mm diam. Phyllaries 18–30+ in 3–4 series, ± erect, oblong to elliptic, 6–10+ mm. Ray florets 8–13; laminae 15–25+ mm. Disc florets 60–100+; corollas yellow. Cypselae dark brown, ± elliptic, 10 mm, faces glabrous; pappi 0–0.5 mm. 2n = 34.


Phenology: Flowering (May–)Aug–Sep.
Habitat: Rocky slopes, igneous or limestone substrates
Elevation: 1200–1800 m

Distribution

V21-267-distribution-map.gif

Ariz., N.Mex., Mexico (Coahuila, Durango, Zacatecas).

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Verbesina rothrockii"
John L. Strother +
B. L. Robinson & Greenman +
Ariz. +, N.Mex. +, Mexico (Coahuila +, Durango +  and Zacatecas). +
1200–1800 m +
Rocky slopes, igneous or limestone substrates +
Flowering (May–)Aug–Sep. +
Proc. Amer. Acad. Arts +
Undefined (tribe Undefined) subtribe Enceliinae +, Undefined (tribe Undefined) subtribe Engelmanniinae +, Undefined (tribe Undefined) subtribe Spilanthinae +, Undefined (tribe Undefined) subtribe Verbesininae +  and Undefined (tribe Undefined) subtribe Zinniinae +
Verbesina rothrockii +
Verbesina +
species +