Journal
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
Volume 144, Issue 2, Pages 193-198Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1095-8339.2003.00241.x
Keywords
chromosomes; classification; Cornaceae; Davidioideae; evolution
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Davidia involucrata Baill. and Camptotheca acuminata Decne were investigated and compared karyomorphologically. Their idiogrammatic formulae are, respectively, 2n = 42 = 20m (2SAT) + 16sm + 4st + 2t and 2n = 42 = 22m (2SAT) + 14sm + 4st + 2t. The plants are very similar: both belong to the 213 asymmetry karyotype (the karyotypes are reported here for the first time) and in both the prophase chromosomes are of the interstitial type. Davidia is believed to be closely related to Camptotheca. We do not consider it appropriate to remove Davidia from Camptotheca into a different family or subfamily. The cytological data support Davidia and Camptotheca forming a subfamily (Davidioideae) of the broadly circumscribed Cornaceae. (C) 2004 The Linnean Society of London.
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