Difference between revisions of "Psilactis gentryi"

(Standley) D. R. Morgan

Syst. Bot. 18: 302. 1993.

Basionym: Aster gentryi Standley Publ. Field Mus. Nat. Hist., Bot. Ser. 22: 60. 1940
Synonyms: Machaeranthera gentryi (Standley) R. C. Jackson ex B. L. Turner Machaeranthera mexicana B. L. Turner & D. B. Horne
Treatment appears in FNA Volume 20. Treatment on page 463. Mentioned on page 462, 464.
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1071.xml
 
|tribe=Asteraceae tribe Astereae
 
|tribe=Asteraceae tribe Astereae
 
|genus=Psilactis
 
|genus=Psilactis

Latest revision as of 19:58, 5 November 2020

Annuals, 20–120 cm. Stems and branches often sparsely appressed- or erect-hairy, stipitate-glandular, more densely distally. Distal leaf blades ovate to lanceolate, smallest 5–12 × 2–6 mm, bases cordate to auriculate, clasping. Involucres hemispheric, 5–8 mm. Phyllaries lanceolate to linear-lanceolate, equal or slightly unequal, 4–7 × 0.7–1.2 mm; outer often mostly herbaceous (bases inconspicuously indurate), scarious margins absent or obscured by stipitate glands; inner: bases indurate, margins scarious. Receptacles flat to convex, 4–6 mm diam. Ray florets 30–70; laminae 7–14 × 1–1.5 mm. Disc florets 50–150; corollas 2.5–4.5 mm. Ray cypselae 1.2–2 mm, sparsely to densely appressed-hairy. Disc cypselae 1.2–2.5 mm, sparsely to densely appressed-hairy; pappus bristles 40–50, 2.5–4 mm. 2n = 8 (Mexico).


Phenology: Flowering Sep–Nov.
Habitat: Canyon bottoms, along rocky streambeds
Elevation: 1700–2300 m

Distribution

V20-1071-distribution-map.gif

Ariz., Mexico (Chihuahua, Durango, Hidalgo, Mexico, Sonora).

Discussion

Psilactis gentryi occurs in the Huachuca Mountains of southeastern Arizona.

Selected References

None.

Lower Taxa

None.
... more about "Psilactis gentryi"
David R. Morgan +
(Standley) D. R. Morgan +
Aster gentryi +
Ariz. +, Mexico (Chihuahua +, Durango +, Hidalgo +, Mexico +  and Sonora). +
1700–2300 m +
Canyon bottoms, along rocky streambeds +
Flowering Sep–Nov. +
Machaeranthera gentryi +  and Machaeranthera mexicana +
Psilactis gentryi +
Psilactis +
species +