Helianthus rigidus var. subrhomboideus (Rydb.) B.L.Turner

, Sida, Bot. Misc. 24: 6 (2003) (2003).
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External links to taxonomic opinions:
POWO
IPNI Life Sciences Identifier (LSID)
urn:lsid:ipni.org:names:70028926-1
Species Name
Helianthus rigidus Desf., Tabl. École Bot., ed. 3 (Cat. Pl. Horti Paris.) 184 (1829).
Publication
Sida, Botanical Miscellany. Dallas, TX
Collation
24: 6 (2003)
Family as entered in IPNI
Asteraceae

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Basionym
Helianthus subrhomboideus Rydb., Mem. New York Bot. Gard. 1: 419 (1900).
Isonym of
Helianthus rigidus var. subrhomboideus (Rydb.) Cronquist, Fl. Pacific Northwest 528 (1973).