Difference between revisions of "Psilactis asteroides"
Mem. Amer. Acad. Arts, n. s. 4: 72. 1849.
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|place=4: 72. 1849 | |place=4: 72. 1849 | ||
|year=1849 | |year=1849 | ||
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| + | |special_status={{Treatment/ID/Special_status | ||
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|name=Aster boltoniae | |name=Aster boltoniae | ||
|authority=Greene | |authority=Greene | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Machaeranthera boltoniae | |name=Machaeranthera boltoniae | ||
|authority=(Greene) B. L. Turner & D. B. Horne | |authority=(Greene) B. L. Turner & D. B. Horne | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Psilactis leptos | |name=Psilactis leptos | ||
|authority=Shinners | |authority=Shinners | ||
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}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Psilactis;Psilactis asteroides | |hierarchy=Asteraceae;Asteraceae tribe Astereae;Psilactis;Psilactis asteroides | ||
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name=Psilactis asteroides | name=Psilactis asteroides | ||
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|authority=A. Gray | |authority=A. Gray | ||
|rank=species | |rank=species | ||
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|publication title=Mem. Amer. Acad. Arts, n. s. | |publication title=Mem. Amer. Acad. Arts, n. s. | ||
|publication year=1849 | |publication year=1849 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1072.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Psilactis | |genus=Psilactis | ||
Latest revision as of 19:58, 5 November 2020
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
Ariz., N.Mex., Tex., Mexico.
Discussion
Psilactis asteroides grows in eastern Arizona and western New Mexico and Texas.
Selected References
None.