Tas. 6044. 
CRASSULA prorusa. 
Native of South Africa. 
Nat. Ord. CrassuLAce®. 
Genus CrassuLa, Linn, ; (Benth. and Hook. f. Gen. Pl., vol. i. p. 657). 
CrassuLa (Perfilata) profusa; glaberrima, vix glauca, profuse ramosa, ramis 
dependentibus et repentibus teretibus, foliis ima basi connatis orbicu- 
lari-ovatis acutis carnosis dorso convexis, margine integerrimo badio- 
limbato superne serie intramarginali punctorum ornato, cymis breviter 
pedunculatis capitatis, calycis segmentis linearibus, petalis ovatis 
acutis albis, stylis divergentibus, glandulis hypogynis brevissimis. 
A free-flowering and remarkably ramous species of Crassula, 
sent from the Graaf Reinett district of the Cape Colony by 
Harry Bolus, Esq., who has contributed many new and curious 
plants to both the Gardens and Herbarium at Kew. It 
approaches the C. perfossa, Lam., and C. perforata, Linn., but 
differs from both in habit, in the only slightly connate leaves, 
and longer narrow calyx lobes ; it is still nearer C. marginata, 
Ait., with which it further agrees in habit, but the leaves are 
not broadly connate, and are green (not purple) beneath. The 
structure of the leaf is very curious. The margin, which is quite 
entire, is edged with a narrow band of chestnut-brown, within 
which is a series of orbicular slightly convex punctiform 
disks. These disks, when highly magnified, are found to 
consist of a very dense cellular tissue, that terminates down- 
wards inaconical form, and communicates with the peripheral 
ends of the nerves, in the loose parenchymatous substance of 
the leaf. The surface of the disk is studded with excessively 
minute stomata, of a different form from the other stomata 
on either surface of the leaf, the guard-cells of these stomata 
further contain on their outer edge a row of minute chloro- 
phyle granules, giving them a most beautiful appearance. 
The same disposition of these disks occur in C. /actea and 
C. marginata, but not in C. perforata ; their terminating the 
me 
JULY Ist, 1873. 
