Difference between revisions of "Simsia lagasceiformis"
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 577. 1836.
Common names: Annual bush sunflower
Synonyms: Simsia exaristata A. Gray
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|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Simsia;Simsia lagasceiformis | |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Simsia;Simsia lagasceiformis | ||
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|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | ||
Revision as of 19:36, 16 December 2019
Annuals (rarely persisting), 20–400 cm (taprooted or fibrous rooted). Leaves: petiole bases rarely dilated (not fused to form nodal discs), blades ovate to deltate, 2–21 × 1–16 cm, rarely 3-lobed. Heads in tight to loose, corymbiform arrays. Peduncles 0.5–10 cm. Involucres 8–12 × 5–10 mm. Phyllaries 13–19, unequal. Ray florets 5–10; corollas orange-yellow, laminae 5.1–12 mm. Disc florets 13–27; anthers yellow proximally, usually purple to bronze distally. Cypselae 4.2–6 mm; pappi usually 2.5–4.6 mm, rarely 0. 2n = 34.
Phenology: Flowering year round (mostly Sep–Dec).
Habitat: Deserts, roadsides, open fields, borders of agricultural fields
Elevation: 100–2200 m
Distribution
Ariz., N.Mex., Tex., Mexico, Central America (Guatemala).
Discussion
Selected References
None.
Lower Taxa
None.