OP ARTS AND SCIENCES. 357 



line between them. It would seem that this species is always more 

 or less villous, and the capsule larger and more broadly winged 

 and more abruptly contracted at top. The calyx-tube is usually 

 shorter in proportion to the ovary, and the capsule with its pedicel 

 often 1 to 1 1 inches long. 



CEnothera rosea, Ait. At Monterey, Nuevo Leon (34G), in 

 swampy places near Morales (170 Schaffuer), and Guanajuato (Duges), 

 where it is called " Yerba del Golpe." 



OENOTHERA BRACHTCAKPA, Gray. At Saltillo (2120), and a form 

 with extremelj' narrow leaves (342). This species appears to include 

 CE. Wri'ffhtii, Gray. 



OENOTHERA (Megapterium) dissecta, Gray, in herb. Stems 

 slender, herbaceous, from an underground rootstock, branching, decum- 

 bent or erect, sparingly pubescent: leaves narrow, 1 or 2 inches long, 

 pinnatifidly lobed, the linear lobes very unequal : flowers axillary, 

 sessile, the calyx-tube Ih inches long, slightly dilated above, the tips 

 free in the bud ; petals rose-color, an inch long : capsule oblong-ovate, 

 narrowed at each end, half an inch long, strongly winged at least 

 toward the top and with a prominent thick rib between the wings. 

 — In sandy localities near San Luis Potosi (168 Schaffner) ; 249 

 Parry & Palmer. 



CEnothera Hartwegi, Benth. In the mountains east of Saltillo 

 (337, 341), and at Saltillo a form with somewhat smaller flowers 

 (344). At Lerios a low form was sparingly collected, with linear 

 leaves, and nearly corresponding to the variety lavandulcsfolia. 248 

 Parry & Palmer is a similar but still more reduced form with small 

 flowers. 



LoPEziA ruMiLA, Bonpl. In the mountains near San Luis 

 Potosi (640 Schaffner), and at Guanajuato (Duges). The smaller 

 specimens from the latter locality accord with the original description. 

 The much larger ones from Dr. Schaffner are still more pubescent, 

 and with leaves an inch long or more. 



Lopezia trichota, Schlecht. ( ?) In swamps about San Luis Potosi 

 (641 Schaffner), and at Guanajuato (Duges) ; 256 Parry & Palmer. 

 Not agreeing wholly with the description of the original specimens, 

 which were found in rocky localities. The herbaceous stems are from 

 a very thick perennial root, the lower leaves opposite, broadly ovate, 

 rounded or subcordate at base, obtuse or acutish, obsoletely toothed, 

 the upper oblong-ovate to lanceolate, acute and more acutely toothed ; 

 the narrow petals and the style pilose, the stamens glabrous. 



Gaura parviflora, Dougl. At Saltillo (2119). 



