114 PROCEEDINGS OF THE AMERICAN ACADEMY 



PniLIBERTIA LINEARIS, Benlll. & Ilook., Var. HETEROniYLLA, 



Gray. At Parras, Coaliuila (822). 



Philibertia elegans, Benth. & Hook. In tlie San Miguelito 

 Mountains, San Luis Potosi (649 Schaffner), and at Guanajuato 

 (Duges) ; 589 Parry & Palmer. 



AsCLEPiODORA DECUMBENS, Gray. At Sutherland Springs, Texas 

 (817), and in the Sierra Madre, south of Saltillo (818). The Mexican 

 specimen is referred by Fournier (Ann. Sci. Nat. 6. 14. 369) to A. 

 asperula, Fourn. (Acerates asperula, Decaisne), which it may be, 

 though it seems to differ in no respect from ordinary A. decumbens. 

 A. viridls is not certainly known from Mexico, as Andrieux' and 

 Bourgeau's specimens so named by Ilemsley are referred by Fournier 

 to Asclepias auriculata. 



AsCLKPiODORA ciRCiNALis, Fournier, 1. c. 369. (^Acerates circina- 

 lis, Decaisne.) At Saltillo (815) ; in fruit only and in every way 

 resembling Asclepias bracltystephana, Engelm., but in the glabrous 

 leaves and the umbels sessile in the upper axils. Fournier describes 

 the follicles as 3 inches long, but in these specimens they do not 

 exceed half of that, as in A. hrachystephana. 



Acerates viridiflora. Ell. Sparingly collected at Sutherland 

 Springs, Texas, and in the Caracol Mountains, Coahuila. 



Asclepias verticillata, Linn. At Parras, Coahuila (809, in 

 part), and at San Luis Potosi (Schaffner) : 584 Parry & Palmer. — 

 Also var. subverticillata, Gray, at Guadalupe (810) and Suther- 

 land Springs (2093), and at Parras with the typical form (809). 



Asclepias Linaria, Cav. At Lerios, Coahuila (811), and at 

 Guanajuato (Duges), where it is known as " Venenillo " ; 585 Parry 

 & Palmer. 



Asclepias perennis, Walter, var. parvula, Gray. At Suther- 

 land Springs, Texas (2092), and in the Caracol Mountains, Coahuila 

 (812). The Mexican specimens are referred by both Flemsley and 

 Fournier to A. nivea, Linn., which has greener flowers, with longer 

 hooils, and the horns not exserted. 



Asclepias brachystephana, Engelm. At Parras (813), and in 

 the mountains east of Saltillo (814); 576 Parry &, Palmer. 



Asclepias glaucescens, HBK. {A. data, Benth.) In the 

 Sierra Madre, south of Saltillo (816) ; 579 Parry & Palmer. 



Asclepias longicornu, Benth. At Sutherland Springs, Texas 

 (819, 2094) ; 587 Parry & Palmer. 



Asclepias setosa, Benth. At Guanajuato (Duges); popularly 

 known as " Taraumara." 



