153 



stout, dark-green; ribs 10-12, acute, often 

 oblique, with areolae 2-3 cm apart; radial 

 spines about 12, irregular, 1-1.5 cm long; 

 centrals 3, the lower one 5-10 cm long and 

 deflexed; flowers near the summit, white, 

 10 cm long; fruit 'as large as a goose 

 egg', dark purplish-red, bearing wool and 

 spines. Type Weber specimens in hb Mo 

 bot gard. Common about Tehuacan, Pue- 

 bla. Important for its wood, which forms 

 long, straight rods used for poles in hedg- 

 es and vineyards."— Coulter, Cont Na hb 

 3:411. 

 OPUNTIA LARREYI Weber. 



"Plant only 9-12 dm high, with large or- 

 bicular glaucous jo.nls; fruit 'as large as 

 a goose egg', juicy, pulpy, and with pur- 

 ple pulp; se»cis small much liks thoaa of 

 O. ficus indica . Type unknown. A Mex- 

 ican species, found by Dr. Weber about 

 Querebaro, and tron'ounced by h:m tih« 

 most de.i^ious of a.l the fru.ts he had 

 tasted. Known as 'camuessa'. — Coulter, 

 Cont Na hb 3:4i3. 

 OPUNTIA TESAJO Engelm. 



"Wi/t'h very short woody stem, and 

 growing in little clumps 3 dm or less in 

 diameter; joints slender and not distinctly 

 tuberculate; flowers simple, bell-shaped, 

 yellow. Type, Gabb 26 in hb Mo bot gaird. 

 'Among rocks, especially toward the west 

 coast and in the more central portions', 

 L/ower California."— Coulter, Cont Na hb 

 3-448. 

 OPUNTIA PALMERI Enge m. 



"Joints oval, smooth (not tuberculated), 

 pale glaucous, 20-25 cm long by 15-20 cm 

 broad; pulvini 2.5-3 cm apart, with pale 

 brownish or gray pers. stent wool, a few 

 very slencer itraw-coiored bristles, aad 

 slender flattened or compressed straw- 

 colored spines 2.5-3 cm long c5-7 on upper 

 pulvini with some srria.-er a d tional 

 ones, 1-3 on lower tulv.ni), erecc or 

 spreading, or the upper ones (from upper 

 part of pulvinus) mostly deflexed. Type, 

 Palmer of 1877 in hb Mo bot gard. Near 

 St. Gecrge, Utah."— Coulter, Cont Na hb 

 3-423. 

 OPUNTIA RUBRIFOLIA Engelm. 



'PiOS.iate, with thi>.k ovate jo nts 12-15 

 cm long by 10 cm broaJ, not tubercu ated; 

 leaves spreading, somewhat recurved, 

 reddish, 8-10 mm long; pulvini 2-2.5 cm 

 apart, with brownish-grdy persistent 

 wool and numerous yeliowish bristles (es- 

 pecially on the upper edge); spines often 



The West American Scientist. 



154 



twisted, 2.5-6 cm long, often a few addi- 

 tional smaller ones, all de"exed (almost 

 appresstd ; lO^e s and f uit un'.tnown. 

 Type. Palmer 3 n hb Mo b.t gard. St. 

 George, Utah."— Coulter, Cont Na hb 3:424. 



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