Difference between revisions of "Helenium microcephalum var. microcephalum"
Treatment appears in FNA Volume 21. Treatment on page 434.
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|accepted_name=Helenium microcephalum var. microcephalum | |accepted_name=Helenium microcephalum var. microcephalum | ||
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name=Helenium microcephalum var. microcephalum | name=Helenium microcephalum var. microcephalum | ||
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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 20:08, 5 November 2020
Plants 30–120 cm. Leaves: proximal and mid blades serrate to undulate-serrate, glabrous or sparsely hairy; distal blades glabrous or sparsely hairy. Heads 20–150(–300+) per plant. Peduncles 1–3.5 cm, projecting terminal heads barely beyond foliage. Involucres 4–8 × 4–8 mm. Ray florets 7–13; corollas yellow, 2.6–4.8 × 1.6–3.9 mm. Disc florets 120–300+; corollas 1.2–1.6 mm, lobes (4–)5. Pappi (0.2–)0.3–0.4(–0.5) mm. 2n = 26.
Phenology: Flowering (Feb–)Jun–Jul(–Nov).
Habitat: Sandy or clay soils, ditches, washes, around ponds and lakes, along streams
Elevation: 0–1500 m
Distribution
Ariz., N.Mex., Okla., Tex., Mexico (Coahuila, Nuevo León, and Tamaulipas).
Discussion
Selected References
None.
Lower Taxa
None.