563 
A new species of Typhonium Schott 
(Araceae-Areae) from the Northern Territory, 
with notes on the conservation status 
of two Areae endemic to the Tiwi Islands 
A. Hay and S.M. Taylor 
Abstract 
Hay, A} and Taylor, S.Md (’Royal Botanic Gardens, Mrs Macquaries Road, Sydney, NSW, Australia 
2000; ^Northern Territory Herbarium, Parks & Wildlife Commission of the Northern Territory, 
P.O. Box 496, Palmerston, NT, Australia 0831) 1996. A new species o/Typhonium Schott (Araceae- 
Areae) from the Northern Territory, with notes on the conservation status of two Areae endemic to the 
Tiiui Islands. Telopea 6(4): 563-567. Typhonium johnsonianum is described as new from Black 
Jungle, NT. The discovery of two or three further incompletely known Northern Territory Areae 
is noted. The newly described species is fitted into a previously published key to Typhonium in 
Australasia. T. joncsii A. Hay is noted to be widespread and fairly common in the Tiwi Islands. 
A second population of the rare Lazarum mirabile A. Hay is reported from Melville Island. 
Conservation status of these taxa is proposed using ROTAP codes. 
Introduction 
Sriboonma et al. (1994) published a revision of Typhonium, based mainly on study of 
the Asiatic species and incorporating the Australasian species recognised in Hay 
(1993). The closely allied Australian endemic genus Lazarum A. Hay, with one 
species, was erected by Hay (1992). Generic delimitation and distribution of the tribe 
Areae, to which these genera belong, have been discussed by Hay (1992, 1993). 
Recent collecting by S.M.T. has turned up three or four (some of the variation may 
be intraspecific) putatively new taxa of Areae in the Northern Territory, all within a 
short distance of Darwin. Of these, only one is yet known in flower. The other two 
or three taxa, not matching known species vegetatively and not able to be ascribed 
with certainty to one or other of the above-mentioned genera, are now in cultivation 
at the Royal Botanic Gardens Sydney and/or the Darwin Botanic Gardens. While it 
is unlikely that they will all become known in flower and be validly named before 
the deadline for submission of the Araceae manuscript for Flora of Australia, it 
seems desirable to name the one that is more fully known before that deadline is 
reached. These new taxa, added to those recognised in Hay et al. (1995), bring the 
total number of indigenous Australian aroid species to 31 or 32. 
Recently A.H. was able to join an excursion to the Tiwi Islands organised by the 
Parks & Wildlife Commission of the Northern Territory which found, inter alia, a 
second population of Lazarum mirabile, hitherto known only from its Type locality, 
and several additional populations of Typhonium jonesii A. Hay. 
1. Typhonium johnsonianum A. Hay & S. Taylor, sp. nov. 
Ab aliis speciebus Typhonii organis neutris supra, inter et infra pistilla dispositis, 
appendice lateraliter compressa differt. 
