340 THE ORCHID REVIEW. [NOVEMBER, 1922. 
ORCHIDS OF SOUTH AUSTRALIA. 
N important contribution to Orchidology has recently been published in 
2 J. M. Black’s Flora of South Australia. It comprises an enumeration 
of the Orchids of South Australia by Dr. R. S. Rogers, M.A., an authority 
whose valuable work has received world-wide recognition. No less than 43 
pages are occupied with carefully drawn up descriptions of each species, 
the localities where they were found growing, and their season of flowering. 
Additional value to this work is given by the inclusion of nine whole-page 
plates, containing representations of eleven species, as well as text figures 
of nine others. It isa most useful reference book and doubtless will be 
much appreciated by all students of South Australian Orchids. 
A total of, nineteen genera, all of which are terrestrial, are represented 
in this State. Of these the genus Dipodium represents the tribe Vandee, 
all the rest being members of the Neottiew. The genus Dipodium, so 
named on account of the two stalks, or false caudicles, of the pollinary 
apparatus, includes about nine members. D. punctatum is a leafless fleshy 
plant having an extensive system of thick elongated tuberous roots. 
Calochilus, meaning “ beautiful lip,” comprises six species, five of which 
are endemic to Australia. One of them has copper coloured bracts and 
flowers, and on that account was named C. cupreus by Dr. Rogers. 
Thelymitra embraces about forty-two species, having Australia apparently as 
a distributing centre. The name is derived from the Greek for ‘‘ wearing 4 
woman’s head-dress,” in allusion to the hood of the column. The segments 
of the perianth are all similar, the labellum being undifferentiated from the 
others. Albino forms are said to be not infrequent. T. azurea_ bears 
flowers of a deep azure blue. In Microtis, meaning * small ear,” the column 
bears a small wing or auricle on each side of the anther. Nine species 
have been recorded in Australia, seven being endemic. 
The genus Prasophyllum is an important one, some sixty species having 
been recorded. It has representatives in New Zealand, but otherwise 1s 
exclusively Australian. The flowers appear to be reversed, the labellum 
being uppermost. P. odoratum has strongly perfumed flowers, but Dr. 
Rogers describes, under the varietal name album, a small plant with smaller 
flowers than the type, and with fewer pink tints, the flowers in this case 
being without perfume. The genus Caleana commemorates the name of 
G. Caley, a collector of New South Wales plants. Four species are known, 
the flowers have labellum pointing upwards, while the caudicle and viscid 
disc are absent. 
Corysanthes, derived from the Greek for ‘‘helmet-shaped flower,” and 
comprising upwards of forty species, has four or five representatives in 
Australia. In Acianthus, meaning “ pointed flower,’ the dorsal sepal is 
