444 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



root, spreading or ascending, 6 to 20 cm, long; stem leaves 3 to 8, 

 ovate, 1.5 to 3.5 cm. long, shallowl}^ cordate, acute, dark green, paler 

 beneath, the margins irregularly but not conspicuously crenate-dentate, 

 petioles longer than the blades, the lower ones longest; root leaves 

 few or none, small, rounded-ovate, crenate; stipules somewhat toothed, 

 ovate or ovate-lanceolate, obtuse or acute, 4.5 to S mm. long; pedicels 

 filiform, equaling oi" exceeding the blades, 3 to 9 cm. long, bibracteo- 

 late above the middle with linear bractlets; sepals glabrous, linear- 

 lanceolate, acute, 6 to 7 mm. long, 1 to 1.5 mm. broad at the base, the 

 auricles very short, rounded or subtruncate; petals bright yellow, 

 veined and the two upper strongl}' tinged with reddish-brown, equal, 

 8 to 10 nmi. long, the odd petal broadh^ spatulate and trun(;ate or 

 somewhat emarginate, the paired petals obovate-lanceolate, the lateral 

 pair with truncate ends, the upper pair with rounded ends; capsules 

 subglobose-ovoid, 8 to 9 mm. long, slightly exceeding the spreading 

 sepals. 

 Specimens examined: 



Hidalgo: Sierra de Pachuca, Rose & Painter, September 1, 1903 

 (no. 6731), sheet no. 450286 in the U. S. National Herbarium (type); 

 Rose & Hay, 1901 (no. 5580); Rose & Hough, 1899 (no. 4470). 



Mexico: Sierra de las Cruces, under firs, 3,030 meters, C. G. Pringle, 

 1892 (no. 4193) and 1903 (no. 11373); near Salazar, Rose & Painter, 

 1903 (nos. 6999 and 8028); near Cima, Rose &. Painter, 1903 (no. 7161). 



All of the specimens examined are from an altitude of about 3,000 

 meters or more in the States of Mexico and Hidalgo. The species is 

 usually found under firs. 



Explanation of plate IV. — Fig. rt, plant two-thirds natural size; 5, 

 petals, natural size. 



VIOLA PRINGLEI Rose & House, nom. nov. 



Y. r(?7J';'«n.*? Robinson, Proc. Am. Acad. 27: 165.1892, not Y. reptans 

 Presl. in Reichb. Fl. Germ. Excurs, 705.1830-32. 



From its stoloniferous character and white flowers, Y. pringlei is 

 related, but by no means closely, to Y. hlanda Willd.'^' of the north- 

 ern United States and Canada. The type of Y. reptans Robinson, and 

 therefore of Y. pringlei^ was collected b}^ C. G. Pringle near Patzcuaro, 

 Michoacan, November, 1890 (no. 3591) and is in the Gray Herbarium. 

 Pringle's no. 4148, 1892, from the same locality is identical. 



a Willdenow, Hort. Berol. pi. 24. 1806. 



