332 PROCEEDINGS OF THE AMERICAN ACADEMY 



Colorado, the S. stellata, Torr. & Gray. This is marked especially 

 by having the rather smaller carpels more or less rostrate, at least 

 when young, and their sides strongly reticulated toward the base. 

 It seems impossible, however, to draw a clear line between the two. 

 The leaves are usually serrate and mostly somewhat hastately lobed ; 

 mountains near Saltillo (94, 95, 9G, 98, 99, 100, 101), and at 

 Monterey, Nuevo Leon. A form with entire and less undulate leaves 

 was collected at Parras (97). The flowers vary in size, and in color 

 from salmon to pink and magenta. It is popularly known to the 

 Mexicans as " yerba del negro." 



Pavonia LASiOPETALA, Scheele. (P. Wrightii, Gray.) At Uvalde, 

 Texas (89), and a form with more acutely and deeply-toothed leaves 

 at Monclova, Coahuila (90). 



Malvaviscus Drummondii, Torr. & Gray. At San Antonio, 

 Texas (115). Known as "May-apple," and the scarlet fruit eaten, 

 both raw and cooked. 



Hibiscus cardiophtllus, Gray. At Soledad, Coahuila (107). 



Hibiscus Coulteri, Harv. At Saltillo, Coahuila (83). 



Hibiscus denudatus, Benth., var. involucellatus. Gray. At 

 Monclova, Coahuila (84). Tliis is much the more common form. 



GossYPiUM Barbadense, Linn. At San Lorenzo de Laguna, 

 Coahuila (116). " Considered by some to be indigenous." 



Hermannia Texana, Gray. At Juraz (113). 



Melochia pyramidata, Linn. At Laredo, on the Rio Grande 

 (117). 



Ayenia microphylla, Gray. At Juraz, Coahuila (114). 



CoRCHORUS piLOLOBus, Link. At Guadalupc, Texas (119), and 

 at Juraz, Coahuila (120.) 



TiLiA Mexicana, Benth. On Caracol Mountains, near Mon- 

 clova, Coahuila (118). 



LiNUM rupestre, Engelm. In the Sierra Madre, east and south 

 of Saltillo. 



LiNUM Greggii, Engelm. At Monterey, Nuevo Leon. A single 

 specimen. 



LiNUM RiGiDUM, Pursh. At Monterey (122). More glaucous 

 than L. Berlandieri, with narrower leaves and shorter calyx. 



LiNUM Cruciata, Planch. At Guajuco, Nuevo Leon (121). 

 Lower leaves very obtuse or slightly apiculate, only the uppermost 

 glandular-toothed. 



LiNUM lecheoides. Erect, leafy, hispid throughout, the stout 

 purplish stems fastigiately branched toward the top, a foot high: 



