folia; Dr. Chang of Singapore kindly sent me type-material of 
Vanda penangiana; from Dr. Garay | got copies of Ridley’s 
original drawings; from Paris I have studied material of Vanda 
viminea. Wallich 7325 which I believe, as stated above, could be 
considered an isotype of Aerides rigida, is unfortunately not 
accessible, but Mr. Taylor kindly sent me a good photograph of 
it from the Wallich Herbarium. Below in the list of localities | 
have indicated with an ‘‘!’’ are other specimens | have seen, 
including our own Thai material. 
On Plate 11 I have assembled sketches of some of these 
flowers. I am not able to find any differences among the flowers 
sketched or among other flowers investigated for there are no 
separating characters. Some of my colleagues have suggested 
that there might be separating characters in the vegetative as- 
pects, especially in the leaf tips that might be equally or un- 
equally bilobed, etc. On Plate 12 are the outlines of the leaf tips 
of several plants from the different geographical areas. My con- 
viction 1s that the variation is not sufficiently constant to be of 
specific significance. Dr. Garay pointed out that the Chinese 
plant is almost equal at the tip, whereas the western plants are 
decidedly unequal at the tip. It is true, as will be seen in the 
figure, that the little evidence we have from the single leaf of 
Champion 528 and the picture of the type of Vanda multiflora 
indicate almost equal tips, but the fresh material sent by Dr. Lau 
from Hongkong and the specimens collected there by Taam 
seem just as unequally bilobed as some of the western plants and 
vice versa. The same is true of the Hainan plants I saw recently 
in the Peking Herbarium. 
Maybe when more material is available for study, we will be 
able to distinguish local forms, but for the time being I must 
consider all these plants as belonging to one species. This Asiatic 
case seems to be paralleled in Africa, where Dr. Senghas re- 
duced all taxa to Acampe pachyglossa, admitting only two 
geographical subspecies, based on leaf characters. Incidentally, 
I find it highly probable that further studies will consider also 
Acampe pachyglossa as being conspecific with Acampe rigida, 
but I have not studied the African material. 
Finally, it should also be mentioned that Dr. Garay sent me a 
copy of Reichenbach’s drawing of Acampe intermedia Rchb.f. 
Reichenbach speaks in his diagnosis of ‘‘foliis aequaliter 
bilobis’’, but one of his sketches shows a very unequal leaf tip; 
ie, 
