New Zealand Journal of Botany abstracts
Cardamine lacustris, a new combination for Iti lacustris
(Brassicaceae)
P. B. Heenan
Landcare Research
P.O. Box 69
Lincoln 8152, New Zealand
Abstract Artificial hybrids between Iti lacustris
and a New Zealand species of Cardamine are easily produced and highly
fertile. The hybrids are intermediate between Cardamine and Iti
in leaf characters, but are more like the Cardamine in their perennial
growth habit, floral characters, and explosively dehiscent siliques with
recoiling valves. These fertile hybrids and previously published molecular
data imply that Iti and Cardamine are very closely related
and should be considered congeneric. A new combination, Cardamine lacustris,
is provided for Iti lacustris. A combination of flower and silique
characters of C. lacustris, including only four stamens, short-oblong
siliques, passive dehiscence, and non-recoiling valves, make this a particularly
unusual and interesting species of Cardamine.
Keywords Brassicaceae; Cardamine; C. lacustris;
Iti; I. lacustris; taxonomy; new combination; intergeneric
hybrids; New Zealand flora
B02001 Received 3 January 2002; accepted 1 July 2002; published 28 November
2002
New Zealand Journal of Botany, 2002, Vol. 40: 563-569
0028-825X/02/4004-0563 $7.00 © The Royal Society of New Zealand
2002
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