OF AllTri AxND SCIENCES. 71 



V. 



]\ILSCELLANEOUS BOTANICAL CONTRrBUTIONS. 

 By Asa Ghay. 



Presented, Oct. 12, 1875. 



TiiK following notes and characters relate mainly to Californi in 

 botany, the writer having been engaged in the preparation of the 

 Gamopetalce for Professor Brewer's Botany of California, now print- 

 ing. Some of the observations are such as could not well be recorded 

 in that work ; and the characters of ceitain new genera and species 

 may appropriately be introduced to the botanical world in a continua- 

 tion of the " Contributions" which have from time to time been com- 

 municated to the Academy, and published in its Proceedings. My 

 first note has reference to two plants of the Atlantic United States, 

 which have long been confounded. 



Sedum pusillum Michx. Glauco-pallidum, 1-3-unciale ; foliis 

 alternis teretiusculis oblongis (lin. 2-3-longis) ; floribus ad summitatera 

 ramorum laxe cymosis tetrameris ; pedicellis petala alba oblongo-ovata 

 acutiuscula suba^quantibus ; folliculis elongato-oblongis stylo brevis- 

 simo snbito apiculatis ; seminibus ovali-oblongis. — On granite rocks ; 

 Flat Rock near Camdeu, South Carolina, Michaux ; Stone Mountain, 

 Georgia, "W. M. Canby, 18G9, and A. Gray, 1875. This little plant 

 I found on Stone JMouotain, in great abundance from the base to near 

 the summit, in full blossom on the 19th of April last. Fruiting speci- 

 mens were sparingly collected at the same station in May, 1809, by 

 ;Mr. Canby, who, however, did not distinguish it from Diamorpha 

 pnsilla Nutt., which accompanies it, but is most abundant towards and 

 upon the summit of this singular granitic mountain. I cannot learn 

 that the true Sedum pitsil/um has been elsewhere seen, except, long 

 ago, by Michaux. But the two are probably associated at other 

 stations. At least they must be so at Flat Rock. For there Nut tall 

 collected, in winter, old fruiting specimens of the plant he descrihed in 

 his Genera Plantarum, p. 110, as "7V//d?a? crjinosa (Sednm jm.silhon 

 Michx)," and ou p. 293 as " Diamorpha pusilla {Sedum pusillum 



