518 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 



Placed tentatively in the Pubescentes by Schumann although 

 glabrous. Berger suggests other relationships. 1 



OPUNTIA VELUTINA Weber 



Opuntia velutina WebEr, Bull. Mus. Nat. Hist. Paris 10: 389. 1904. 



Type locality : In Guerrero. 



Distribution : Only known from the type locality. Not seen by us. 



OPUNTIA ATROPES Rose, sp. nov. 



Plant 1 to 3 meters high, much branched ; joints oblong to obovate, 

 20 to 30 cm. long, deep green, softly pubescent; young joints some- 

 what glossy; leaves 4 to 5 mm. long, terete in section, acuminate, 

 pubescent, the tips reddish, standing almost at right angles to the 

 joints; areoles circular, filled with short tawny wool; young spines 

 white or yellowish ; old spines 3 to 6 cm. long, somewhat angled, 

 standing almost at right angles to the joints, dark yellow or brown 

 at the base, much lighter, often white above; glochides numerous, 

 long, yellow ; petals reddish ; ovary pubescent, covered with large 

 cushion-like areoles, with few spines or none, truncate at apex. 



Type in U. S. National Herbarium, no. 452,103, collected by J. N. 

 Rose and Jos. H. Painter on the lava beds (pedregal) near Yautepec, 

 Morelos, Mexico, July 12, 1905 (no. 8608). 



OPUNTIA DURANGENSIS Britton & Rose, sp. nov. 



Joints broadly obovate, about 20 cm. long and two-thirds as wide, 

 pale green, glabrous ; areoles 1 to 2 cm. apart, elevated, about 5 cm. 

 wide; spines 3 to 5 at each areole, yellow, stiff, pungent, 1.5 cm. long 

 or less, spreading ; glochides brown, 2 to 3 mm. long ; flowers yellow, 

 about 5 cm. wide ; petals obovate, subulate-tipped ; ovary 3 to 4 cm. 

 long, finely puberulent, bearing numerous areoles with many glo- 

 chides and few terete spines; "fruit white or red;" seeds turgid, 

 about 3 mm. wide. 



Type in herbarium of N. Y. Botanical Garden, collected in the 

 vicinity of Durango, Mexico, by Dr. E. Palmer, 1896 (no. 212). 



OPUNTIA LEUCOTRICHA DC. 



Opuntia leucotricha DC. Mem. Mus. Paris 17: 119. 1828. 



Type locality: Mexico. 

 Distribution: Central Mexico. 



We place this species in the Pubescentes rather than in the Chaeto- 

 phorae to which it was referred by Prof. Schumann. 



1 Monatsschr. Kakteenk. 17: 71. 



