Difference between revisions of "Bidens heterosperma"
Smithsonian Contr. Knowl. 5(6): 90. 1853.
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name=Bidens heterosperma | name=Bidens heterosperma | ||
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|authority=A. Gray | |authority=A. Gray | ||
|rank=species | |rank=species | ||
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|habitat=Seeps on rocky slopes | |habitat=Seeps on rocky slopes | ||
|illustrator=Linny Heagy | |illustrator=Linny Heagy | ||
| + | |illustration copyright=Flora of North America Association | ||
|elevation=1500–2800 m | |elevation=1500–2800 m | ||
|distribution=Ariz.;Colo.;N.Mex.;Mexico (Baja California;Chihuahua;Sinaloa;Sonora). | |distribution=Ariz.;Colo.;N.Mex.;Mexico (Baja California;Chihuahua;Sinaloa;Sonora). | ||
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|publication year=1853 | |publication year=1853 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_508.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae | ||
Latest revision as of 21:12, 5 November 2020
Annuals, (5–)10–30(–60+) cm. Leaves: petioles 3–20 mm; blades usually rounded-deltate overall, 10–30+ × 5–20+ mm, 1–2-pinnatisect, ultimate lobes linear to filiform, 2–25 × 0.5–1(–2) mm, bases obscurely cuneate, ultimate margins minutely, if at all, ciliate, apices obtuse to acute (sometimes apiculate), faces glabrous or sparsely hirtellous. Heads usually borne singly. Peduncles 10–50(–100) mm. Calyculi of (1–)3(–5), appressed to spreading, linear bractlets (1–)3(–4) mm, margins minutely, if at all, ciliate, abaxial faces usually glabrous, sometimes sparsely hispidulous. Involucres ± cylindric, 3.5–5 × (1–)2–3 mm. Phyllaries 5–6, lance-elliptic to lanceolate, 2.5–4(–5) mm. Ray florets 0 or 1–3+; laminae yellowish, 1–4 mm. Disc florets 5–9(–13); corollas yellowish, 1–1.5 mm. Cypselae red-brown to blackish (sometimes with lighter blotches), outer ± obcompressed and linear, 3–5 mm, margins not ciliate, apices ± truncate, faces 2-grooved, usually glabrous; inner similar, ± equally 4-angled, linear-fusiform, (6–)7–12 mm, apices ± attenuate; pappi 0, or of 2(–3) spreading to divergent, retrorsely barbed awns 1–2 mm.
Phenology: Flowering Sep–Oct.
Habitat: Seeps on rocky slopes
Elevation: 1500–2800 m
Distribution
Ariz., Colo., N.Mex., Mexico (Baja California, Chihuahua, Sinaloa, Sonora).
Discussion
Selected References
None.