Difference between revisions of "Psilactis gentryi"
Syst. Bot. 18: 302. 1993.
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| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Aster gentryi | |name=Aster gentryi | ||
|authority=Standley | |authority=Standley | ||
| + | |publication_title=Publ. Field Mus. Nat. Hist., Bot. Ser. | ||
| + | |publication_place=22: 60. 1940 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V20_1071.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Psilactis | |genus=Psilactis | ||
Revision as of 18:40, 24 September 2019
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
Ariz., Mexico (Chihuahua, Durango, Hidalgo, Mexico, Sonora).
Discussion
Psilactis gentryi occurs in the Huachuca Mountains of southeastern Arizona.
Selected References
None.