166 PROCEEDINGS OF THE AMERICAN ACADEMY 



87. NicoTiANA Mexicana, Schlecht. in Linnaea, 15, litt. p. 95 ? 

 Belongs to the section Tabacum ; perhaps the same as N. caudata, 

 Nutt. PL Gamb. 



88. NicoTiANA iPOMOPSiFLORA, Dunal. (M09. and Sesse. Ic. Mex.) 

 in DC. Prodr. 13, p. 559. K Tahacam, var.?? Benth. PL Hartw. 

 no. 205. N. trigonophylla, DunaL in DC. L c. p. 562. "i\r. midti- 

 jlora, Nutt. PL Gamb. ? " (sed ubi ?) Torr. in Pacif. R. R. Rep. 5, p. 



362? — A common North Mexican species extending into the United 

 States, rather variable, but well marked. When fully developed the 

 fruiting racemes are long, virgate, and unilateral, and the corolla (6 or 

 8 lines long) is white or greenish-white, or yellowish, with a small five- 

 angled border. The whole plant is viscid. It is no. 579 of Coulter's 

 Californian, and 1255 of his Mexican collection. It occurs in Wright's 

 first Texan-New-Mexican collection without a number (unless the num- 

 ber is lost from my set), in his later collection it is no. 1607. Wright 

 also collected it in Texas as early as the year 1848 ; also Lindheimer, 

 in his coll. 1850 (300), "iV. rupicola, Lindh. rascr. "; Dr. Gregg in 

 Mexico (no. 61, and without a number) ; Thurber in Sonora (no. 

 987) ; and Dr. Bigelow in the interior of California. I believe it is 

 also Berlandier's no. 1361, from San Louis Potosi ; but the specimens 

 (in fruit) are too poor to determine. No. 75 of Xantus's Fort Tejon 

 collection is of a different but allied species, perhaps N. sordida, 

 Lehm. I cannot find any " iVi muUiflora " in Nuttall's paper on Gam- 

 bell's collection. 



89. Lycium brevipes, Benth. Bot. Voy. Sulph. p. 40 ; Miers, IlL 

 S. Amer. PL 2, p. 117, t. 69. 



90. Yallesia dichotoma, Ruiz & Pav. ex Benth. Bot. Voy. 

 Sulph. p. 33. Leaves lanceolate-oblong, even the nascent ones gla- 

 brous. 



91. AscLEPiAS suBULATA, Dccaisnc ? ; Torr. in Pacif. R. R. Rep. 

 5, p. 362, t. 7, & Bot. Mex. Bound, p. 164. 



92. BoERHAAViA ERECTA, Linn. A slender form, not uncommon 

 in Sonora, Western Texas, &c. 



93. BoERHAAViA SPiCATA, Chois. ? ; ToiT. in Bot. Mex. Bound, p. 

 171. This is most allied to B. Wrightii. The lowest leaves are ovate 

 or oblong and obtuse, but the upper ones narrower and cuspidate-acute, 

 often attenuate-acuminate, the margins mostly very undulate, the sur- 

 faces brown-dotted. Nothing is more variable than the size of the 

 perianth in this genus. Instead of being small, as in the specimens 



