Nomenclatural notes and neotypification of Oenothera biennis var. sulphurea (Onagraceae)
The taxonomy of individuals of Oenothera biennis (Onagraceae) with sulphur-yellow flowers is discussed. Due to the lack of original material, the modern specimen collected from the classic stand, stored in National Herbarium of the Netherlands in Leiden is designated to serve as neotype.
1996 ◽
Vol 26
(12)
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pp. 1355-1363
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2001 ◽
Vol 24
(s1)
◽
pp. 50-53