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THE LINNAEAN SPECIES OF ASCYRUM (GUTTIFERAE)
Author(s) -
Robson N. K. B.
Publication year - 1980
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1220287
Subject(s) - typification , synonym (taxonomy) , botany , hypericum , biology , correct name , genus , nomenclature , taxonomy (biology)
Summary Ascyrum L. is now regarded as a synonym of Hypericum L. Typification of all three Linnaean species of this genus has given rise to problems. In particular, Linnaeus's concept of A. cruxundreae was confused; and the present treatment of this species as a synonym of Hypericum mutilum L. is clearly unsatisfactory. Following a review of the nomenclatural history of the three species it is concluded that: (1) A. crux‐andreae L. should be lectotypified by Clayton 230 (LINN), i.e., it has priority over Ascyrum stans Michaux ex Willd., so that Hypericum crux‐andreae (L.) Crantz replaces H. stans (Michaux ex Willd.) Adams & Robson as the accepted name of a well‐known species from south‐eastern U.S.A.; (2) A. hypericoides L. should be lectotypified by Plumier, Nov. Pl. Amer. Gen : t.7 (1703), a procedure which preserves the current usage; (3) A. villosum L. should be lectotypified by Plukenet, Phytographia : t.245, f.6 (1691) and treated as a synonym of Hypericum setosum L., thus preserving the current usage. In addition A. multicaule is given a new rank: H. hypericoides subsp. multicaule (Michaux ex Willd.) N. Robson, stat. nov.