NOTULÆ AD PLANTAS ASIATICAS. 
PART IV. 
Exogenous Plants. 
4 CYCADACE. 
| CYCAS, 
Tug species of this genus, with the exception of C. 
revoluta, are difficult to discriminate, so much so that the 
study of living plants at different stages is quite necessary to 
fix their differences. In habit and foliation, no practic: marks 
are to be discovered, these appearing to be limited to the 
shape of the carpel leaf, especially the dilated apex, and 
to the figure of the fruit. 
The anomaly of the upper part of the carpel leaf Wes 
d broader than the rest: what does it indicate ? 
were 
practical ones can be taken from the leaves. I would derive 
them from the carpel leaves, particularly the lamina and its 
mode of division, the shape of the anther scales, the shape 
of the fruit, and the line of their points described by the leaves. 
C. spherica; fol. carpel. spith., parte nud. 6-uncialib. 
3 ovulig., apice lanceolato-acuminatis e basin subulato-den- 
tatis, conico-subalato dente squam. apiculo curvato equant. 
fruct spheerica. 
C. circinalis: apice squam. autem brevior subito. fol. carpel 
min. versus dist. ovulig. lamina subspath. a medio supra 
dentato-serrat, acumenato-subulat. 
& 
C. dilatata. The distinctions are very difficult, few if any 
E 
