8S SEDUM NEVII. NEVIUS' STONE-CROr. 



of the Arnold Arboretum, was a cultivated one. It will be observed 

 that Mr. Shriver's description differs a little from Dr. Chapman's, 

 which we have adopted, as to the relative length of the sepals and 

 petals; but as Dr. Gray makes no reference at all to the sepals 

 or petals, it is probable there may be variation in this respect, 

 and these characters may therefore be of no specific importance. 



As a general rule, Sedums in cultivation like exposed and warm, 

 dry places, but this is true only of the kinds which are found 

 naturally in low regions. Mountain kinds, though they do like 

 open places where there is full light, as a general rule do not like 

 a high temperature. In the effort to cultivate this species made 

 by the writer, it was placed in a piece of rock-work, with a large 

 number of European species, but it gradually dwindled away. 



In the culture of Sedums we have found that, in spite of their 

 succulence, they seem very grateful when suffered to grow 

 where they can get abundant moisture as well as light. But this 

 moisture must be only for the foliage ; for if the roots be in the 

 least stagnated with water, the plant suffers, — rots away in fact. 

 The most successful Sedums we ever saw were on a ledge of rock ; 

 but they were continually washed by spray from a fountain 

 near by, and thus kept up a beautiful, carpet-like green mass of 

 herbage. 



Besides the discrepancy between the characters of the sepals 

 and petals in the plants seen by Mr. Shriver, and those described 

 by Dr. Chapman, there seems to be some variation in the time 

 of flowering. Dr. Gray says the flowers appear "three or four 

 weeks later than " those of Sedum ternatum. But Dr Chap- 

 man says S. ternatum flowers in May and June, and S. Nevii in 

 April and May. 



In Nevii the specific appellation is of course derived from the 

 name of the discoverer of the plant, Dr. JVevius, and we may 

 therefore give for its common name " Nevius' Stone-Crop." 



EXPLANATION ok the Plate. — i. Complete plant. — 2. Full-face view of an enlarged 

 flower. 



