New Zealand Journal of Botany abstracts
B00002Received 13 January 2000; accepted 6 June 2000
Taxonomy, ecology, and conservation of Atriplex billardierei and
A. hollowayi sp. nov. (Chenopodiaceae) in Australasia
P. J. DE LANGE
Science & Research Unit
Department of Conservation
Private Bag 68908
Newton
Auckland, New Zealand
D. A. NORTON
School of Forestry
University of Canterbury
Private Bag 4800
Christchurch, New Zealand
G. M. CROWCROFT
Natural Resource Assessors
16 Jesmond Terrace
Mt Albert
Auckland, New Zealand
Abstract A new, endemic species
Atriplex hollowayi
(Chenopodiaceae) is described from the North Island, New Zealand. It is
distinguished from the Australasian
A. billardierei by its smaller
stature; sturdy, erect, heavily branched shrub habit; distinctly irregular
sinuate-dentate leaves; weakly fused chartaceous bracteoles; and smaller seeds.
A detailed description of
A. billardierei is provided to distinguish
both species and a lectotype selected. The status of
A. chrystallina,
treated as a synonym of
A. billardierei, is discussed and the name
typified.
A. billardierei and
A. hollowayi are similar
ecologically. Both are strand plants and show marked year-to-year variation in
numbers. Germination is significantly better in seed that has been first soaked
in salt water. Both species are considered to be at risk from competition with
naturalised strand plants, browsing animals, sand mining, and, in the case of
A. hollowayi, over-collecting.
Atriplex hollowayi is rated as
Critically Endangered and
A. billardierei as Declining.
Keywords Atriplex; A. billardierei; A.
chrystallina; A. hollowayi; Theleophyton; taxonomy;
ecology; reproductive biology; conservation; Australasian flora
New Zealand Journal of Botany, 2000, Vol. 38: 569-574
0028-825X/00/3804-0569 $7.00 (c) The Royal Society of New Zealand 2000
PDF file of entire paper: medium quality (2437K); (scanned from paper original: notes about this process)
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