13 . 
S.A. NAT,. VOL. XIV. 
’ November, 1932 . The Orchids of Corom andel V alley, S.A. 
T. paucijlora, R.Br., T. carnea, R.Br., and T. flexuosa, Endl. 
-are ail small-flowered species, the last-named being uncommon 
liere. ■ . 
7’. antennifera, Hook.f. is the sweetly-scented, yellow- 
flowered plant. On sunny days it makes the scrub a fairyland 
thronged by eager courtiers, all^ reflecting the lustre of their king, 
the sun. All the species of Thelymitra favour open ground 
where they receive plenty of sunshine. 
The genus Microtis is represented by two species, M. porri- 
joiicij Spreng., and AI. oblongUj Rogers., both being fairly 
common. They may be distinguished one from the other by the 
cmarginate-tipped labellum, whicli tlie former possesses, while 
the latter has an entire labellum. 
Prasophylhim is a genus witli many species of similar 
appearance and with many intermediate forms. One which is 
common here is I\ odoratum, Rogers, Others also found in the 
district arc P. patens, R.Br., and a few plants of P. Fitzgeraldh, 
Rogers et Maiden. 
P. nigricans, R.Br., one of the dwarf species, is abundant 
when searched for, but can easily be. overlooked through being 
30 diminutive. 
The helmet orchids Corysanthes sp. were critically revised 
in 1928 by the Rev. H. M. R. Rupp, and W. H. Nicholls with the 
result that two of our species have changed their names. The 
larger of the two in question was known here as C. fimhriaia, 
R.Br., but the joint authors showed that that species was not 
found in South Australia, and described our plant as a now 
species C. dilatata, Rupp and Nicholls. This plant has its flower 
standing high off the leaf, and the tubular portion of the 
labellum shows be'lbw the circular lamina when viewed from the 
front. The smaller plant, which was known here as C. pruvnosa, 
Cunn., was shown to be C, diemenica, LIndl. The flower of this 
species is placed close to the leaf and the lamina of the labehnm 
hides all the tubular part behind it. Both of these species should 
be found in this locality, but so far I have found but one, C. 
Jiemenica, Lindl, These were growing in a moist gully behind 
the butts of gum trees and in the shade of yaccas. 
Our dainty mosquito-orchids are represented by two species, 
Acianthus exsertus, R.Br., and A. reniformis (R.Br.), Sch. 
iCyrtosylis reniformis, R.Br.). Both are abundant, and are found 
in large communities in deep moss and rotting leaves where their 
tubers can spread easily. I have found some young tubers eight 
inches away from the parent plant. 
One of our most beautiful orchids is Lyperanthus ni^rican^ 
R.Br., sometimes called the “mournful flower.” The leaves of 
