Malacothrix glabrata

(A. Gray ex D. C. Eaton) A. Gray

in A. Gray et al., Syn. Fl. N. Amer. 1(2): 422. 1884.

Common names: Smooth desertdandelion
Basionym: Malacothrix californica var. glabrata A. Gray ex D. C. Eaton in S. Watson, Botany (Fortieth Parallel), 201. 1871
Treatment appears in FNA Volume 19. Treatment on page 316. Mentioned on page 312.

Annuals, (5–)10–40+ cm. Stems (1–)3–5+, ascending to erect, usually branched proximally and distally, glabrous or sparsely arachno-puberulent near bases (sometimes glaucous). Cauline leaves: proximal usually pinnately lobed (lobes 3–6+ pairs, usually filiform, subequal to unequal, apices acute), ultimate margins entire, faces glabrous or ± hairy (then usually glabrescent); distal reduced (usually pinnately lobed). Calyculi of 12–20+, lanceolate to linear bractlets, hyaline margins 0.05–0.2 mm wide (abaxial faces often ± densely white-hairy). Involucres campanulate to hemispheric, 9–17 × 4–7 mm. Phyllaries 20–25+ in 2–3 series, lance-linear to linear, hyaline margins 0.05–0.3 mm wide, faces usually glabrous, abaxial sometimes ± white-hairy. Receptacles bristly. Florets 31–139; corollas usually pale yellow, sometimes white, 15–23+ mm; outer ligules exserted 9–15+ mm. Cypselae ± cylindro-fusiform (sometimes weakly 5-angled), 2–3.3 mm, ribs extending to apices, usually ± equal; persistent pappi of 0–12+, blunt to acute teeth plus 1–2(–5) bristles. Pollen 70–100% 3-porate. 2n = 14.


Phenology: Flowering Mar–Jul.
Habitat: Coarse soils in open areas, or among shrubs, creosote bush scrublands, Amsinckia, Artemisia, and Atriplex-Larrea associations, Joshua tree woodlands
Elevation: 0–1800 m

Distribution

V19-474-distribution-map.gif

Ariz., Calif., Idaho, Nev., N.Mex., Oreg., Utah, Mexico (Baja California, Sonora).

Discussion

Malacothrix glabrata grows in the Mojave, Great Basin, and Sonoran deserts in California and the Intermountain region in Arizona, Nevada, Oregon, and Utah.

Selected References

None.

Lower Taxa

None.
... more about "Malacothrix glabrata"
W. S. Davis +
(A. Gray ex D. C. Eaton) A. Gray +
Malacothrix californica var. glabrata +
Smooth desertdandelion +
Ariz. +, Calif. +, Idaho +, Nev. +, N.Mex. +, Oreg. +, Utah +, Mexico (Baja California +  and Sonora). +
0–1800 m +
Coarse soils in open areas, or among shrubs, creosote bush scrublands, Amsinckia, Artemisia, and Atriplex-Larrea associations, Joshua tree woodlands +
Flowering Mar–Jul. +
in A. Gray et al., Syn. Fl. N. Amer. +
Undefined tribe Lactuceae +
Malacothrix glabrata +
Malacothrix +
species +