OP ARTS AND SCIENCES. 107 



Thelesperma gracile, Torr. & Gray. At Saltillo (639), and 

 Parras, Coahuila (2061"'^). 



BiDENS CHRYSANTHEMOiDES, Michx. At Uvalde, Texas (G33). 



BiDENS HETEROPHYLLA, Oi't. At Parras, Coahuila (634). 



Galinsoga parviflora, Cav. At the same locality (652) ; a 

 variety without pappus iu the ray. 



Tridax procumbens, Linn. In Mexico (629, 2061). 



RiDDELLiA ARACHNOiDEA, Gray. In Mexico, localities uncertain 

 (678, 679, 2082). 



Hymenopappus flavescens, Gray. In the Sierra Madre, south 

 of Saltillo (650). 



Hymenopappus artemisi^folius, DC. At Uvalde (2081). 



Bahia absinthiifolia, Benth. In Coahuila and Nuevo Leon, a 

 narrow-leaved form, answering to the original (674), and a slightly 

 broader-leaved form (672, 673). Also var. dealbata. Gray, from 

 near Monclova. 



Florestina Tripteris, DC. In Western Texas (653), and Coa- 

 huila (654). 



PoLYPTERis Tex ANA, Gray. {Palafoxia Texana, DC.) In West- 

 ern Texas (642, 644, 2060), and at Soledad, Coahuila (645). 



PoLYPTERis HooKERiANA, Gray. {Palofoxia Hookeriana, Torr. 

 & Gray.) In Western Texas (655). 



PoLYPTERis CALLOSA, Gray. [Palafoxia callosa, Torr. & Gray.) 

 At Bluffton, Texas (656). 



Palafoxia linearis. Lag. At Monclova, Coahuila (643). Ap- 

 parently an annual-rooted form. 



Sartwellia Mexicana, Gray; new sp. At Monclova and San 

 Lorenzo de Laguna, Coahuila (683, 687). 



Flaveria longifolia, Gray. ( Gymnosperma (?) oppositifoUum, 

 DC.) At Parras, Coahuila (681, 685); 498 Parry & Palmer. The 

 specimens with smaller heads come very near F. linearis, Lag., of the 

 coast of Cuba, the Bahamas, and Florida. 



Flaveria chlor.efolia, Gray. At Juraz and Parras, Coahuila 

 (682, 2083). 



Flaveria angustifolia, Pers. At San Lorenzo de Laguna, 

 Coahuila (684). A low and narrow-leaved variety. 



Flaveria (Broteroa) repanda. Lag. Near Parras (686). 

 Sometimes confounded with F. Contrayerha. 



PoROPHYLLUM FiLiFOLiUM, Gray ; new sp. In the Sierra Madre, 

 south of Saltillo (688). The specimens may be found mixed with a 

 little Thelesperma suhsimplicifolium. 



