CATHARINEA RHYSTOPHYLLA 233 
dioicous species with the leaves transversely undulate. At the 
most, then, the characters indicated by C. Miller imply that the 
n 
besetzt’’); on the other hand, an equal numbe 
with that species indicate no difference at all in the undulation of 
the leaves, nor do they always describe them as less toothed at 
back, the fact being that C. angustata exhibits a considerable 
amount of variation in this respect. 
Salmon (loc. cit.) compares his new species, C. Henry2, both 
with C. angustata and C. rhystophylla, giving measurements of 
cells, &c. The measurements of the cells of C. rhystophylla, and 
fl 
lamella. From the most extreme forms of C. angustata (as com- 
pared with C. undulata), having the leaves pellucid, slightly undu- 
late only and faintly spinose at back, with the border compara- 
tively weakly toothed and only in upper half of leaf, C. rhysto- 
phylla indeed presents a somewhat strikingly different appear- 
reo 
iderable series of C. angustata at once reduces these appa- 
ei? T 
rently substantial differences to a minimum. e two forms 
the extremes of a series of gradations presented by 
bscure. A f 
yself in South Tyrol in 1904 presents almost identical characters. 
Turner’s Hill, Sussex, Nov. 1901, has still more rugose, spinose 
leaves, and differs little or not at all from C. rhystophy 
a fruiting plant of C. angustata, from the Austrian coast of the 
Adriatic (leg. Leitlesberger), has leaves which, for the development 
of their rugosity and the asperity of their armature, outdo the 
most ferocious forms of C. rhystophylla itself! 
JournaL or Botany.—Von. 47. [June, 1909.] 8 
