568 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Strongly veiny, 3 to 3.5 cm. long.- — Mexico, Sierra de las Cruces, alt. 

 3,080 m., Sept. 19, 1899 (C. G. Pringle, no. 8225); Vera Cruz, 

 Orizaba {BoUeri, no. 207): Oaxaca, slopes of Mt. Zempoaltepec, alt. 

 2,400 to 3,080 m., July 5-10, 1894 (K W. Nelson, nos. 587, 681): 

 Jalisco, between Huejuilla and Monte Escobedo, Aug. 25, 26, 1897 

 (J. N. Hose, nos. 2577, 2606). Nearly related to P. areiiicola, Kear- 

 ney, of the southeastern United States. 



P. philippensis. Freely branching from a stout woody caudex ; the 

 slender branches somewhat ligneous at base, about 2 dm. in length, long- 

 pilose with crisp white jointed hairs : leaves appressed-pubescent above, 

 pilose beneath on the veins and ciliate on the margins, broadly rhombic- 

 obovate, coarsely and bluntly angulate-sinuate, 1 to 3 cm. long, 1 to 2.5 

 cm. wide, broadly subcuneate below to a broad long-pilose petiole 1 

 to 1.5 cm. long: peduncles 1 cm. long, ^jilose : calyx during anthesis 

 about 8 mm. long, white-pilose, cleft into narrowly ovate acutish or 

 blunt lobes: corolla short-campanulate, 1.5 cm. long, 2 to 2.5 cm. 

 broad, whitish or pale yellow, with very broad purplish markings : 2 

 filaments longer than the others, 7 mm. long ; anthers short-oblong, 

 purple and yellow, 3 or 4 mm. long : fruit not seen. — Oaxaca, 

 Sierra de San Felipe, alt. 2,617 m., June 1, 1894 ( C. G. Pringle, no. 

 5621). 



P. sordida. Perennial, densely pubescent all over with short sordid 

 glandular-pilose hairs : the stems depressed, 4 or 5 dm. long, freely 

 branching : leaves from suborbicular to ovate, coarsely but bluntly 

 sinuate-dentate, subcordate or truncate below, pubescent on both faces, 



1 to 5 cm. long, 1 to 3 era. broad, on slender glandular-pilose petioles 1 

 to 3 cm. long: peduncles short, barely 1 cm. long in fruit: calyx in 

 anthesis 6 or 7 mm. long, sordid-pubescent, with triangular-lanceolate 

 acute lobes: earlier corollas 1.5 cm. broad, sulphur-yellow, with small 

 drab or brownish patches at base : filaments somewhat unequal ; anthers 

 yellow and green, narrowly oblong, 3 or 4 mm. long: fruiting calyx 

 broadly short-ovate, glandular-pilose, not conspicuously angled, 1.5 to 



2 cm. long. — Apparently in sand (the entire plant coated with fine sand), 

 Oaxaca, Boca de Leon, Telixtlahuaca, alt. 2,310 m., Aug. 8, 1895 

 {Albert L. Smith, no. 637). Nearest related, apparently, to P. rotundata, 

 Rydberg, of the southwestern United States. 



P. saltillensis. Puberulent throughout with fine white stellate hairs : 

 branches slender, terete below, sub-angulate above : leaves elliptic-ovate, 

 coarsely and bluntly sinuate-dentate, the upper unequal and geminate, 3 

 to 6 cm. long, 2 to 4 cm. wide, unequally subcuneate or rounded at base 



