Jamesianthus

S. F. Blake & Sherff

Publ. Field Mus. Nat. Hist., Bot. Ser. 22: 399. 1940.

Etymology: For Robert Leslie James, 1897–1977, American botanist and historian, and Greek anthos, flower
Treatment appears in FNA Volume 21. Treatment on page 377. Mentioned on page 364, 365.
Revision as of 18:51, 24 September 2019 by FNA>Volume Importer

Perennials, 60–150+ cm (fibrous-rooted). Leaves cauline; opposite; petiolate or sessile; blades ± lanceolate to narrowly trullate, (bases sometimes ± auriculate) margins entire or denticulate, faces: abaxial glabrous, adaxial minutely scabrellous to hirtellous. Heads radiate, borne singly or in open, corymbiform arrays. Involucres ± campanulate or broader, 9–12+ mm diam. Phyllaries persistent, 14–18+ in ± 3 series (± oblong, ovate, ovate-oblong, or ovate-attenuate, unequal, outer shorter). Receptacles flat to convex, epaleate. Ray florets 6–8, pistillate, fertile; corollas yellow. Disc florets 20–30, all bisexual or inner functionally staminate; corollas yellow, tubes shorter than to equaling ± campanulate to funnelform throats, lobes 5, ovate-deltate to deltate (style branches stout, appendages deltate). Ray cypselae ± obovoid, weakly obcompressed, 16–24-nerved, ± hispidulous; pappi 0, or fragile, of 6–8+ barbellate bristles (borne on crowns). Disc cypselae ± ellipsoid to clavate, ± hispidulous; pappi 0, or fragile, of 6–8+ barbellulate bristles (borne on crowns).

Discussion

Species 1.

Selected References

None.

... more about "Jamesianthus"
John L. Strother +
S. F. Blake & Sherff +
For Robert Leslie James, 1897–1977, American botanist and historian, and Greek anthos, flower +
Publ. Field Mus. Nat. Hist., Bot. Ser. +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Jamesianthus +
Asteraceae (tribe Heliantheae) subtribe Chaenactidinae +