number of the parts of fructification, by which these genera 
have been always distinguished. Mr. Webb therefore, in his 
work on the Canaries, has remodelled these genera, assigning 
them new characters, and separating from them three groups, 
to which the names onium, Aichryson, and Greenovia are 
severally applied. 
Of these the genus AZonium at least seems well charac- 
terized by having its seed-vessels partially sunk in the recep- 
tacle and not regularly opening by the ventral suture, but only 
at the base and back by an irregular tearing. Of the plants 
referred to this genus, one, ‘“‘ which may be regarded as the 
precursor of the genus,” is the Sempervivum arboreum, which 
occurs farthest to the northward; three others are from Ma- 
deira, viz. S. glandulosum, tabuleforme, and glutinosum ; the 
rest are from the Canaries, and include Sempervivum Smithii, 
barbatum, villosum, ciliatum, cespitosum, Haworthii, urbicum 
and canariense. 
The plant now figured was raised some years ago in the 
Nursery of Mr. Young of Milford, from seeds sent by Mr. 
Webb from the Canaries ; where it is found on the stones and 
bare rocks of the ancient cavern of Tigalate, near the base of 
the Pine region of the isle of Palma, on the road from Mazo to 
Fuencaliente. It was named in allusion to the streaks of 
crimson on its leaves, and to the wounds which Messrs. Webb 
and Berthellot received from an accident in the neighbourhood 
of the basaltic rocks where it grows. The height of the plant 
in its wild state is said to be about two feet; the specimen 
from which our figure was taken was not half so tall. | 
Our figure was executed in May, 1834. 
It requires the same treatment as Mesembryanthemum 
and similar plants, like most of which it is best cultivated in 
wide, shallow pots, well drained with potsherds, and filled 
with a mixture of loam and old mortar, covered with fine sand. 
It requires a warm dry situation during summer, and a cool 
situation with very little water during winter. 
