308 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Hamet from specimens collected among rocks on the Yo-lin-chan, 

 Yunnan, by Delavay (No. 6726), and preserved in the Paris Her- 

 barium. Also collected in Yunnan by Ducloux and others. De- 

 scribed as annual ; but numerous plants, raised both in heat at Glas- 

 nevin and in the open in my own garden, were biennial. The cultivated 



><4 xA ^^^ x8 



X3 



-5. Leblancas Hamet. 



plants agreed well with the description, save that they were larger 

 in most of their parts — leaves half again as long and broad, and 

 sepals, petals, and carpels about \ longer and broader. 



Hamet considers it allied to 5. Aliciae Hamet, indicum Hamet 

 [paniculatum Wallich), perpusillum Hooker fil., Przewalskii 

 Maximowicz, and Schoenlandi Hamet, and gives the points of difference. 



Species Incompletely Known. 

 151. ? Sedum polyrhizum Praeger, sp. nov. (fig. 185). 



At once separated from all other species in cultivation by its 

 curious stems, densely armed with rough scales arranged in rings, 

 and shaggy with short aerial roots almost to the tips. 5. oaxacanum 

 Rose, which resembles it in habit more than do most of the Mexican 

 species, has its stems somewhat similarly roughened, but to a very 

 much less extent, and oaxacanum is a much stouter plant with broader 

 leaves and no aerial roots. The present species much resembles in 

 habit and leaf a small S. album. 



The plant came from New York Botanic Garden labelled S. 

 oaxacanum, and is probably Mexican. Though it grows freely, all 

 efforts to get it to flower have been unsuccessful both at Glasnevin 

 and in my own garden, so that its reference to the genus Sedum must 



