Bartlettia

A. Gray
Pl. Nov. Thurb., 323. 1854.
Etymology: For John Russell Bartlett, 1805–1886, United States Commissioner of the U.S.-Mexico Boundary Survey
Treatment appears in FNA Volume 21. Treatment on page 378. Mentioned on page 364, 365, 395.

Annuals, mostly 5–25 cm. Stems erect to spreading, branched from bases. Leaves mostly basal; subopposite or alternate; petiolate; blades ± deltate to elliptic, sometimes 3-lobed, ultimate margins ± serrate, faces sparsely hirsute or glabrate. Heads radiate, borne singly. Involucres turbinate to hemispheric, mostly 7–9 mm diam. Receptacles convex, knobby, epaleate. Phyllaries 8–22 in 2–3 series (lanceolate to linear, unequal, glandular-puberulent and sparsely strigose). Ray florets 5–13, pistillate, fertile; corollas golden yellow. Disc florets 30–90, bisexual, fertile; corollas yellow, sometimes suffused with purple, tubes (slender) longer than funnelform throats, lobes 5, spreading, deltate (style-branch apices truncate, penicillate). Cypselae obcompressed (each shed with subtending, linear, membranous scale, scales sometimes interpreted as paleae), margins ciliate; pappi fragile, of 17–22 bristles. x = 11.

Distribution

sw United States, Mexico.

Discussion

Species 1.

Selected References

None.

Lower Taxa

... more about "Bartlettia"
John L. Strother +
A. Gray +
sw United States +  and Mexico. +
For John Russell Bartlett, 1805–1886, United States Commissioner of the U.S.-Mexico Boundary Survey +
Pl. Nov. Thurb., +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Bartlettia +
Asteraceae (tribe Heliantheae) subtribe Chaenactidinae +