JUNE, 1922.} THE ORCHID REVIEW. 167 
organ while fresh, the brilliant green raised nerves that traverse the middle’ 
form a striking contrast with the whitish disc which seems to be composed 
of myriads of tiny crystals in piles of unequal density and depth. Plate 110’ 
shows a triandrous form of Psilochilus macrophyllus. The plant came from 
Grenada, B.W.1., and the gynostemium was triandrous in an interesting 
way, the supplementary anthers being lateral, one on each side near the 
base of the stigma. As far as it has been possible to ascertain, a triandrous: 
condition of this plant has not previously been recorded. 
OTOSTYLIS BRACHYSTALIX. 
N interesting paper, entitled “‘ Studies of Otostylis brachystalix, and the 
species with which it has been confused,” is included in Orchidacea, 
fasc. vii. This plant was originally collected in the Aripo Savannah of 
Trinidad and described by H. G. Reichenbach in 1861 as Zygopetalum 
brachystalix. It has had a remarkable history and has given rise to an 
extraordinary synonomy. Prof. Oakes Ames points out that in recent times 
it has been confused with Cyrtopodium cristatum, Lindl., and that in 
1895, in a brief account of Trinidad Orchids, Patter referred to a white 
flowered plant under the name Cyrtopodium Grisebachii, Rolfe (Orch. 
Rev., iii. 276). 
In 1914 Rolfe suggested that the species represented Zygopetalum brachy- 
Stalix, Reich. f., but as the characters were not in conformity with Zygo- 
petalum as now interpreted, he referred it to Aganisia (Orch. Rev., xxii. 200). 
The plant then came under the notice of Dr. Schlechter, who concluded 
that it belonged to Koellensteinia, and he therefore made the combination 
K. brachystalix (Orchis, ix. 31, 32). In 1918 Schlechter published his paper 
on the genus Aganisia (Orchis, xii. 24), and therein placed this plant in a 
new genus under the name Otostylis brachystalix, accompanied bya plate 
of the plant and flowers. Prof. Oakes Ames also gives a plate of this plant 
in Orchidaceae, and says that his studies of Otostylis brachystalix led to a 
Close examination of the plant that has passed unchallenged as Cyrtopodium 
cristatum, Lindl., among Trinidad species. He regarded it as a true 
Cyrtopodium characterised by small flowers that are usually borne in simple 
tacemes. And now comes the interesting climax. ‘‘ When,” adds Prof. 
Oakes Ames, ‘this species is compared closely with the type of Cyrto- 
Podium cristatum collected in British Guiana by Schomburgk it becomes 
very apparent that the Trinidad species is quite distinct from it. As far as 
I have been able to ascertain it is a new species, and for it'I propose the 
Name Cyrtopodium Broadwayi.” Excellent plates of C. Broadwayi and 
C. cristatum serve to make the difference between these two species still 
clearer, 
