Ever since Lindley established Vandeae as a distinct 
division of the Orchidaceae in 1826, the new genera as- 
signed to this tribe have increased at about the same rate 
as did the new species which were indiscriminately added 
to the formerly described genera, until the limit of their 
circumscriptions became utterly vague and often mutu- 
ally inclusive. ‘Thus, we find that Hooker in his Flora 
of British India united Pteroceras, Stereochilus, Microp- 
eraand Chiloschista with the genus Sarcochilus, creating 
one of the most heterogenous mish-mash for an orchid 
genus. Also Saccolabium has fared equally well; it has re- 
ceived Schoenorchis, Gastrochilus, Uncifera and Acampe. 
In 1905, J.J. Smith extended the ever-widening generic 
boundary of Saccolabium by adding Omoea to it together 
with three new sections to accommodate the additional 
aberrant types. Ridley, notwithstanding his statement 
that ‘“The whole of this group of Sarcantheae, 
require to be completely rearranged, and I think more 
equitably broken up’’, carried this expansion of Saccola- 
bium beyond a perceivable horizon, in 1907, through the 
inclusion of Sarcanthus and Cleisostoma. Concurrently 
with these activities certain Angraecum species from 
Africa have also been referred to Saccolabium. Similarly 
chaotic treatments were extended on the one hand to the 
Asiatic genera, Sarcanthus, Thriaspermum and Vanda, 
and on the other hand to the African genera, Angrae- 
cum, Aérangis, Listrostachys and Mystacidium. 
To remedy this deplorable situation, in 1912, J.J. 
Smith has undertaken to clarify some of the Malaysian 
genera, especially Sarcanthus, Camarotis, Schoenorchis, 
Pomatocalpa, Robiquetia, Arachnis and Vandopsis. To 
these he added Saccolabium in 1914. Concurrently 
Schlechter in Die Orchidaceen von Deutsch-Neu-Guinea 
discussed the details of many of the smaller genera. In 
1918, Schlechter also published a revision of all of the 
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