102 PEOCEEDINGS OP THE AMERICAN ACADEMY 



floris ; involucro (lin. 4 longo) e bracteis 7-8 oblongo-lanceolatis acu- 

 tiusculis paucinervatis floribus (albis ?) paullo brevioribus biseriatis, 

 exterioribus parum brevioribus ; acheniis secus costas hispidulo- 

 scabris. — Province of San Luis Potosi, on high mountains near San 

 Miguel, Dr. J. G. Schaffner, coll. Aug. 1876. 



Philactis longipes, Gray, Proc. Am. Acad. xv. 35, is now re- 

 ceived from Dr. Schaffner, the specimens in a more advanced state, 

 showing the obpyramidal-triquetrous fertile akenes of the ray, the 

 inner angle usually aristellate ; and the akenes of the disk, though 

 seemingly well formed, are infertile. 



II. Some Species of Asdepias. 



In the conspectus of the species of Asdepias published in these 

 Proceedings (vol. xii.), and in the Synoptical "Flora of North America, 

 two undescribed species lurked undetected, one under A. longicornUy 

 the other under A. hrachystephana. Both of them were brought to 

 light and are named by the Rev. Edward L. Greene, one of our 

 keenest observers, who collected and examined the living plants in the 

 interesting field where he is now stationed in New Mexico. The main 

 characters of these species are appended. 



AscLEPiAS Wrightii, E. L. Greene, in litt. A. longicornu & A. 

 nyctaginifoUce affinis, hirto-puberula, viridiflora : caulibus e radice 

 crassa decumbentibus spithama^is et ultra foliosis ; foliis lato-lanceo-' 

 latis ovatisve e basi acuta petiolatis ; umbellis ad plerosque iiodos sub- 

 sessilibus plurifloris; cucullis erectis lineari-oblongis antheris triplo 

 longioribus basibus rotundatis columnam brevissimam obtegentibus 

 praiter margines albidas akBformes superne dilatatas solidis infra 

 medium vix constrictis intus sub apice crista parva bifida, lobo postico 

 obtusissimo, antico in cornu breve falcatum subinclusum producto ; 

 antherarum alls semi-ovatis. — Near Santa Rita, New Mexico, C. 

 Wright, 1851-2. In the same district between Silver City and Lone 

 Mountain, July 10, 1880, E. L. Greene. Mr. Wright's specimens, in 

 fruit and with flowers in poor condition, were mixed with those of 

 A. longicornu and remained unnoticed until the species was collected 

 and well described as a new one by Mr. Greene, who assigns to it 

 the present name. The follicles are like those of A. longicornu; 

 those of A. nyctaginifolia are not known, but are probably of the 

 same character. A. Wrightii is wholly related to the latter, but the 

 two should be brought into proximity with A. longicornu, which thus 

 becomes less isolated in the genus. 



