43 6 Thisdton-Dyer— Morphological Notes . 
fact : ‘ When two races or species are crossed, there is the 
strongest tendency to the reappearance in the offspring of 
long-lost characters possessed by neither parent nor immediate 
progenitor ’ (loc. cit., ii. 48). 
Though such facts are well known to cultivators and are of 
extreme interest, they have seldom been put on record with 
much exactness or in a form convenient for reference. If 
seemed to me, therefore, worth while to illustrate rather 
fully a striking case which has come under my own notice 
at Kew. 
Kalanchoe is a genus of Crassulaceae with about fifty 
species which has its head quarters in Africa, from which, 
like many types of the African flora, it has spread eastward 
by way of Arabia and North-west India. Kew has had the 
good fortune to be able to add to science and to horticulture 
two striking new species, both of which have been well 
figured in the Botanical Magazine, and can therefore be 
readily studied. 
K. flammed (B. M. 7595), so named from its brilliant 
orange-red flowers, was raised from seed collected in Somali- 
land by Mrs. Lort-Phillips and Miss Edith Cole. The 
flowering plant is about a foot high, with ‘ obovate or obovate- 
oblong, thickly fleshy, quite entire or obscurely crenulate ’ 
leaves. 
K. Bentii (B. M. 7765) was raised from seeds collected by 
the late Mr. Theodore Bent in the Hadramaut district of 
Southern Arabia. The flowering plant is about three feet 
high, with thickly fleshy, recurved, c dagger-shaped,’ or rather 
stiletto-shaped, leaves ; the flowers are white, but pinkish 
when unexpanded. 
Both species happening to be in flower together, Mr. W. 
Watson, the Curator of the Royal Botanic Gardens, a skilful 
and intrepid hybridizer, attempted to cross them. This was 
done both ways in June, 1900, and in each case the result was 
successful. 
The results were as remarkable as unexpected. I will 
briefly summarize them. 
