New Zealand Journal of Botany abstract
Mazus arenarius (Scrophulariaceae), a new, small-flowered, and rare
species segregated from M. radicans
P. B. HEENAN
C. J. WEBB*
Manaaki Whenua - Landcare Research
P. O. Box 69
Lincoln, New Zealand
P. N. JOHNSON
Manaaki Whenua - Landcare Research
Private Bag 1930
Dunedin, New Zealand
* Present address: Foundation for Research, Science and Technology, P. O. Box
12240, Wellington, New Zealand
Abstract Mazus arenarius Heenan, P.N.Johnson et
C.J.Webb is described from southern New Zealand. It is a perennial, rhizomatous
herb from coastal sand dune hollows and herbfields in south-east Otago,
Southland, and Stewart Island. Mazus arenarius has previously been
included in M. radicans but is distinguished by its uniformly coloured
green-brown or purple-brown leaves which lack blotches, a short peduncle,
smaller flowers with the lower corolla lobes with a retuse apex and horizontal
upper corolla lobes, an obtuse and rounded fruit apex, and usually smaller
seed.
The ecology is described and a list presented of 44 native and 16 naturalised
species associated with M. arenarius at the False Islet and Three
Sisters Dune populations. Mazus arenarius has been recorded from only 14
sites, and as it is never common it is classified as a rare plant.
Keywords Scrophulariaceae; Mazus; Mazus
arenarius; Mazus radicans; new species; taxonomy; New Zealand flora;
conservation
B95006
Received 23 February 1995; accepted 16 August 1995
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