Helenium elegans var. amphibolum
Sida 5: 47. 1972.
Basionym: Helenium amphibolum A. Gray Proc. Amer. Acad. Arts 9: 202. 1874
Treatment appears in FNA Volume 21. Treatment on page 433.
Revision as of 20:54, 27 May 2020 by imported>Volume Importer
Plants 25–70 cm. Leaves: proximal blades usually irregularly toothed or lobed; mid and distal leaves usually entire. Heads 20–50. Peduncles 3–14 cm. Involucres 7–11 × 8–12(–13) mm. Ray florets 13–17; corollas 6.3–15(–19) × 2.2–5.5(–8.7) mm. Disc florets 250–500(–700+). Cypselae 0.7–1 mm; pappi 0.1–0.3(–0.4) mm. 2n = 26.
Phenology: Flowering (Feb–)Mar–Jun(–Sep).
Habitat: Calcareous soils, ditches, washes, along streams
Elevation: 300–1900 m
Distribution
Tex., Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas).
Discussion
Selected References
None.
Lower Taxa
None.