Difference between revisions of "Helenium microcephalum var. oöclinium"
Sida 5: 47. 1972.
Basionym: Helenium oöclinium A. Gray Proc. Amer. Acad. Arts 9: 202. 1874
Treatment appears in FNA Volume 21. Treatment on page 434.
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|publication year=1972 | |publication year=1972 | ||
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Gaillardiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Gaillardiinae | ||
Latest revision as of 21:08, 5 November 2020
Plants 25–80 cm. Leaves: proximal and mid blades serrate to undulate-serrate to occasionally deeply toothed or laciniate, glabrate; distal blades glabrous or sparsely to moderately hairy. Heads 20–100+ per plant. Peduncles 1.5–8 cm, usually projecting terminal heads well beyond foliage. Involucres 8–12 × 8–12 mm. Ray florets 9–13; corollas usually yellow throughout, sometimes reddish proximally and yellow distally, 2.7–9.1 × 1.5–6.7 mm. Disc florets 200–400+; corollas 1.7–2.4 mm, lobes 5. Pappi 0.4–0.7 mm. 2n = 26.
Phenology: Flowering (Mar–)Apr–Jun(–Dec).
Habitat: Sandy or clay soils, ditches, washes, around ponds and lakes, along streams
Elevation: 500–1900 m
Distribution
Tex., Mexico (Coahuila, Nuevo León, Durango, San Luis Potosí).
Discussion
Selected References
None.
Lower Taxa
None.