ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION:. II 
The correlation of the Mexican Sedums with those of the Old 
World presents difficulties. The shrubby species appear best placed 
in the Seda Genuina, with which they possess many connecting links. 
To accommodate another characteristic Mexican group a new section, 
Mexicana, has been instituted. 
Literature. — Britton and Rose, " Crassulaceae," in "North 
American Flora," 22, Part I., 1905, and subsequent papers, mostly 
by J. N. Rose, in " Contributions from the U.S. National Herbarium," 
and elsewhere. 
Central and South America. 
A few species, of no importance horticulturally, occur in Guatemala, 
to the south of the great Sedum-centre of Mexico. Farther south, 
we find that the genus has in old days spread along the great back- 
bone of America, and makes on the Andes its only appearance in the 
Southern Hemisphere,* a few species being found as far south as Peru, 
and one as Bolivia. 
IV. Statistical. 
From the point of view of the gardener anxious to identify a 
Sedum which is unknown to him, the bringing together, as in the 
present paper, of all the species in cultivation, instead of helping him, 
may tend to have the opposite effect, since the comparatively small 
number of more or less common species (to one of which his plant 
probably belongs) is buried among a complex of other rarer plants 
which he is unUkely to encounter. With a view of mitigating this 
difficulty, I attempt below to indicate the species of most frequent 
occurrence, and also those at the other end of the scale,. thus : 
Species very common in Cultivation. 
acre rupestre spurium 
album sexangulare Telephium 
reflexum 
It is probably no exaggeration to say that out of every ten plants 
(of Sedum) found in British gardens, nine belong to one or other of 
these species ; and, furthermore, that of every ten names appHed in 
British gardens to Sedums, five refer to one or other of the seven 
species above. 
Species common in Cultivation. 
Aizoon hyhridum oreganum 
altissimum kamtschaticum roseum 
Anacampseros maximum spectahile 
anopetalum 
* It just reaches the Equator in Africa (see p. 6). 
