568 PROCEEDINGS OF THE AMERICAN ACADEMY, 
strongly veiny, 3 to 3.5 cm. long. — Mextco, Sierra de las Cruces, alt. 
3,080 m., Sept. 19, 1899 (C. G. Pringle, no. 8225); Vera CRvtzZ, 
Orizaba (Botteri, no. 207): Oaxaca, slopes of Mt. Zempoaltepee, alt 
2,400 to 3,080 m., July 5-10, 1894 (#. W. Nelson, nos. 587, 681): 
Jaisco, between Huejuilla and Monte Escobedo, Aug. 25, 26, 1897 
(J. VV. Rose, nos. 2577, 2606). Nearly related to P. arenicola, 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 rhombie- 
obovate, coarsely and bluntly angulate-sinuate, 1 to 3 cm. long, 1 to 2 
cm. wide, broadly subcuneate below to a broad long-pilose petiole 
to 1.5 em. long: peduncles 1 cm. long, pilose: calyx during anthesis 
about 8 mm. long, white-pilose, cleft into narrowly ovate acutish 0 
blunt lobes: corolla short-campanulate, 1.5 em. long, 2 to 2.0 om 
broad, whitish or pale yellow, with very broad purplish markings: ? 
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 (0. G. Pringle, 20 
5621). pe 
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 em. long, 1 to 3 em. broad, on slender glandular-pilose petioles | 
to 3 cm. long: peduncles short, barely 1 cm. long in fruit: calyx : 
anthesis 6 or 7 mm. long, sordid-pubescent, with triangular-lanceolaté 
acute lobes: earlier corollas 1.5 cm. broad, sulphur-yellow, with small 
drab or brownish patches at base: filaments somewhat unequal; ant ee 
yellow and green, narrowly oblong, 3 or 4 mm. long: fruiting caly® 
broadly short-ovate, glandular-pilose, not conspicuously angled, oe 
2 cm. long. — Apparently in sand (the entire plant coated with fine § 995 
Oaxaca, Boca de Leon, Telixtlahuaca, alt. 2,310 m., Aug. 8, 10° 
(Albert L. Smith, no. 637). Nearest related, apparently, to P- rotundatt, — 
Rydberg, of the southwestern United States. J 
P. saltillensis. Puberulent throughout with fine white stellate ba 
branches slender, terete below, sub-angulate above: leaves ellipticovay, 
coarsely and bluntly sinuate-dentate, the upper unequal and geminal: 
to 6 cm. long, 2 to 4 cm. wide, unequally subcuneate or rounded at = 
