OF ARTS AND SCIENCES. 123 



Ipomcea costf.llata, Torr. In the mountains northeast of Mon- 

 clova, Coahuila (2095). 



Ipomcea stans, Cav. At San Lorenzo de Laguna, Coahuila, at 

 San Luis Potosi (1050 Schaffner), and at Guanajuato (Duges) ; 627 

 Parry & Palmer. Duges gives the popular name " Espantolobos." 



Ipoikea heterophylla, Ort. (?) Near Morales, San Luis Potosi 

 (619 Schaffner). Resembling /, Lindheimeri, but with smaller 

 flowers ; the same as 389 Gregg. 



Ipomcea coccinea, Linn., var. hedep.ifolia, Gray. At San Luis 

 Potosi (622 Schaffner) ; 625 Parry & Palmer. 



Ipomcea versicolor, Meissn. At San Luis Potosi (111 Schaff- 

 ner), and Guanajuato (Duges), where it is known as " Palmira." 



Ipomcea Llaveana, Meissn. At Guanajuato (Duges) ; " Trom- 

 petilla." 



Ipomcea Schaffneri. Annual, twining, 3 to 5 feet high, sparingly 

 pubescent with short strigose hairs : leaves thick, round-cordate, with 

 rounded or slightly angled approximate basal auricles, acute, coarsely 

 sinuate- toothed, 1 or 2 inches in diameter, exceeding the petioles : 

 pedicels shorter than the leaves, 1-flowered : calyx-lobes hispid, oblong- 

 ovate, acute, 4 lines long; corolla 2 inches long, rose-color and white, 

 funnelform with a rather broad tube, the stamens and style two-thirds 

 as long : capsule depressed-globose to ovate, 4 lines long, 3-celled. — 

 In sandy places about San Luis Potosi (621 Schaffner) ; peculiar in 

 its round-cordate sinuately toothed leaves. 



Ipomcea ? In sandy places about San Luis Potosi (620 



Schaffner) ; not identified. A slender twining annual, 2 feet high, 

 glabrous or slightly puberulent : leaves 9 to 18 lines long, broad-cor- 

 date to narrowly lanceolate, acuminate, often obscurely sinuate, the 

 short basal lobes rounded or angled ; peduncles about equalling the 

 petioles and shorter than the leaves, 1-2-flowered : sepals lanceolate 

 becoming oblong-ovate and obtuse or acute, 2 lines long; corolla 9 

 lines long, narrowly funnelform, purple above : capsule broadly ovate, 

 3 lines long, 2-celled. 



Convolvulus incanus, Vahl. At Monterey, Nuevo Leon (911), 

 and about San Luis Potosi (618 Schaffner) ; 629 Parry & Palmer. 



EvoLVULUS DISCOLOR, Beuth. At Lerios in the high mountains 

 east of Saltillo, Coahuila (912), Scarcely more than a very villous 

 form of the next. 



EvoLVULUS SERICEUS, Swartz. At Sutherland Springs, Texas 

 (913, 914), and near San Luis Potosi (615" Schaffner); 628^ Parry 

 & Palmer. 



