New Zealand Journal of Botany abstracts
Two new species of Dianella (Hemerocallidaceae) from New
Zealand
P. B. Heenan
Allan Herbarium
Landcare Research
PO Box 40
Lincoln 7640, New Zealand
P. J. de Lange
Terrestrial Conservation Unit
Department of Conservation
Private Bag 68908
Newton
Auckland 1145, New Zealand
Abstract Dianella haematica and D.
latissima are new species described from northern New Zealand,
being currently known from a number of mainland sites as well as
offshore islands, including Great Barrier Island and Little Barrier
Island. These two species are segregated from D. nigra and
differ from that species by growth habit, leaf, and flower characters. D.
haematica is distinguished from D. nigra by its very short
rhizomes and densely caespitose habit, the leaves being longer, wider,
and olive or dark green, the leaf sheaths usually flushed red-brown to
red-maroon, the perianth patent to only slightly recurved, and the
struma and style shorter. D. latissima is distinguished from D.
nigra by its robust and larger growth habit, the leaves being
longer, wider, harshly scabrid, and usually uniformly green, the leaf
sheaths pale green to light yellow-green, and the struma oblong.
Dianella haematica is considered to be a threatened
species, and using the New Zealand Threat Classification System has a
conservation status of Chronically Threatened/Serious Decline. For D.
latissima there is insufficient information to make a formal
assessment and, therefore, we consider it to be Data Deficient,
requiring further survey to determine its distribution, abundance, and
threats.
Keywords Hemerocallidaceae; Dianella; D.
haematica; D. latissima; D. nigra; new species;
taxonomy; New Zealand flora
B06024; Online publication date 29 March 2007 Received 29 June 2006;
accepted 27 November 2006
New Zealand Journal of Botany, 2007, Vol. 45: 269 - 285
0028 - 825X/07/4501 - 0269 © The Royal Society of New Zealand
2007
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