Checklist » Brassicaceae » Draba verna
Last updated 6/1/2010 by David Giblin.
Draba verna L.[FNA7, HC, HC2]
spring whitlow-grass

Publication: Sp. Pl. 2: 642. 1753.

Origin: Introduced from Europe

selected vouchers: WTU

Notes: Autogamy and aneuploidy lead to establishment of many uniform and slightly differing populations, which Rollins (1993b) does not recognize taxonomically.

FNA7: "Draba verna represents a highly variable and taxonomically difficult complex within which species, subspecies, varieties, and forms have been named (O. E. Schulz 1927); only those synonyms pertaining to North America are listed above. Most of the taxonomic difficulties are the results of disploidy, autogamy, and hybridization. The morphological extremes are connected by intermediate forms in every conceivable character. Furthermore, there appears to be no correlation between morphology, cytology, geography, and ecology to support the division of this complex into meaningful taxa. A complex cytological picture was presented by Ø. Winge (1940), including the highest count of 2n = 94, which has not been confirmed by subsequent botanists.

Erophila vulgaris de Candolle is an illegitimate name for Draba verna."

References:

» Wisskirchen, R., and H. Haeupler, Eds. 1998. Standardliste der Farn- und Blütenpflanzen Deutschlands (mit Chromosomenatlas von Focke Albers). Verlag Eugen Ulmer, Stuttgart, Germany. 766 p. [A synonymized list of ferns and flowering plants of Germany, with chromosome atlas by F Albers; in German]
Synonyms & Misapplied Names:
Draba verna L. var. aestivalis Lej.[Peck]
Draba verna L. var. boerhaavii H.C. Hall[HC]
Draba verna L. var. verna[HC]
Erophila verna (L.) DC. ssp. spathulata Walters
Erophila verna (L.) DC. var. praecox (Steven) Diklic[Stace 1997]
Erophila verna (L.) DC. var. verna[Stace 1997]