Psilactis asteroides

A. Gray

Mem. Amer. Acad. Arts, n. s. 4: 72. 1849.

Illustrated
Synonyms: Aster boltoniae Greene Machaeranthera boltoniae (Greene) B. L. Turner & D. B. Horne Psilactis leptos Shinners
Treatment appears in FNA Volume 20. Treatment on page 464. Mentioned on page 462.

Annuals, 25–150 cm. Stems and branches often sparsely appressed-hairy, stipitate-glandular distally, occasionally proximally. Distal leaf blades lanceolate to narrowly elliptic or linear, smallest 2.5–5 × 0.7–1.5 mm, bases cuneate to slightly cordate, sometimes slightly clasping. Involucres hemispheric, 4–5 mm. Phyllaries unequal; outer oblong to narrowly elliptic to lanceolate, 2–2.5 × 0.6–0.9 mm, mostly herbaceous, bases inconspicuously indurate, scarious margins absent or obscured by stipitate glands; inner oblanceolate to lanceolate or linear-lanceolate, 3–5 × 0.7–1 mm, bases indurate, margins scarious. Receptacles flat to convex, 1.8–4 mm wide. Ray florets 20–40; laminae 5–9 × 0.5–1 mm. Disc florets 40–75; corollas 2–3.5 mm. Ray cypselae 1–1.8 mm, sparsely appressed-hairy. Disc cypselae 1.2–2.2 mm, sparsely appressed-hairy; pappi 30–45, 1.5–3 mm. 2n = 8.


Phenology: Flowering May–Nov.
Habitat: Wet or occasionally flooded habitats, stream banks, lakeshores, ditches, fields, disturbed areas
Elevation: 900–2100 m

Distribution

V20-1072-distribution-map.gif

Ariz., N.Mex., Tex., Mexico.

Discussion

Psilactis asteroides grows in eastern Arizona and western New Mexico and Texas.

Selected References

None.

Lower Taxa

None.
... more about "Psilactis asteroides"
David R. Morgan +
A. Gray +
Ariz. +, N.Mex. +, Tex. +  and Mexico. +
900–2100 m +
Wet or occasionally flooded habitats, stream banks, lakeshores, ditches, fields, disturbed areas +
Flowering May–Nov. +
Mem. Amer. Acad. Arts, n. s. +
Illustrated +
Aster boltoniae +, Machaeranthera boltoniae +  and Psilactis leptos +
Psilactis asteroides +
Psilactis +
species +