ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 23 



Flowers hermaphrodite, 5-parted, bright yellow. Hardy East Asiatic 



plants. (P. 107.) , ,.. , 



Section VI. Mexicana Praeger.— Perennial. Rootstock thicken- 

 ing horizontally, or contracted. Stems tufted, erect (at least at first), 

 usually biennial, dying to the root after flowering, the succeeding set 

 when annual usually arising when the previous set is flowering, so 

 that the plants are evergreen. Flowers hermaphrodite, 5-parted, 

 mostly white, rarely red or yellow. Tender Mexican plants. (P. 127 .) 



Section VII. Seda Genuina Koch.— Perennial. Stems perennial, 

 creeping, or erect and sub-shrubby, bearing barren and annual flowering 

 shoots. Flowers hermaphrodite, usually 5- (rarely 4- to 9-) parted. 

 Hardy or tender. (P. 144.) 



Section VIII. Sempervivoides Boissier.— Annual or biennial. 

 Leaves flat, root-leaves forming a rosette. Inflorescence corymbose 

 or racemose-paniculate. Hardy or tender Eurasian plants. (P. 279.) 



Section IX. Epeteium Boissier.— Annual, rarely biennial. Leaves 

 semi-terete or cylindrical (rarely flat), not rosulate. Inflorescence 

 cymose 2- or many-branched, or corymbose. Hardy or tender. (P. 293.) 



The present paper purports to deal only with those species of 

 Sedum which are known in cultivation at the present time. The 

 majority of these species, and almost all the better-known ones, are 

 hardy in the British Isles, and are plants of the rock-garden, more 

 rarely of the herbaceous border. The tender plants come mainly 

 from Mexico and China, and are unevenly distributed among the 

 different sections of the genus. A conspectus of the cultivated species 

 from this point of view appears as follows, the test of the rather vague 

 term " hardy " being capacity for enduring an ordinary winter in 

 Dublin : 



Section I. Rhodiola Scop. 



II. Pseudorhodiola Diels 

 Telephium S. F. Gray 

 Giraldiina Diels 

 V. Aizoon Koch 

 VI. Mexicana nov. sect. 

 Seda Genuina Koch 

 Sempervivoides Boiss 

 Epeteium Boiss. 



III. 

 IV. 



VII. 



VIII. 



IX. 



X. Telmissa Fenzl 



Hardy. 

 20 



I 



13 

 O 



7 



o 



40 



3 

 6 



o 



90 



Tender. 

 O 

 

 O 

 

 



15 



40 

 2 



3 

 o 



60 



The division of a plant-group into tender and hardy species, 

 although convenient for the horticulturist, is quite unscientific. In the 

 case of the present genus, however, this inconvenience is at a minimum, 

 since, as seen from the above conspectus, the species composing its 

 natural subdivisions are in many cases either all hardy or nearly so, 

 or all tender or nearly so. Using the term " hardy " as meaning hardy 

 in suitable situations throughout the British Isles, we find that the 



