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THE LEAF-SPOTS OF BICHABDIA ALBO-MAGULATA, Hook. 
By W. T. Saxton, M.A., F.L.S. 
(Bead August 21, 1912.) 
The genus Bichardia includes six species, of which two are character- 
ised by the presence of peculiar white streaks on the leaf lamina. These 
two are B. alho-maculata and B. melanoleuca, Hook. f. In the mature 
leaves there is no apparent difference between the spots in the two species 
and it is very probable that the devolopment is the same in both. Material 
of young leaves of Bichardia alho-maculata was collected in December, 
1911, during a botanical expedition in the Transkei,* with a view to 
Fig. 1. — Drawing of a transverse section across the 
smallest white streak seen on a leaf of Bichardia 
alho-maculata. x 130. 
investigating the origin of«the white spots on the leaf. The material was 
collected near Kentani, and I am glad to take this opportunity of thanking 
Miss Pegler for her kindness in taking me to the best collecting localities 
in that neighbourhood. 
It was observed that the white streaks, so conspicuous in the mature 
leaf, were both smaller and less conspicuous in young leaves, while in the 
* With the aid of a research grant from the grant committee of the Koyal Society of 
South Africa. 
