6i 



Cacti.— Orcutt. 



(>2 



OPUNTIA LEUCOTRICHA P DC, 



Opuntia lindheimeri E, is Bngelmannii. 

 OPUNTIA MACROCENTRA Engelm. 

 OPUNTIA MACRORHIZA Engelm. 

 CPI NT1A MACULtAOANTHA F. 

 OPUNTIA MICRODASYS Pfeiff. 

 OPUNTIA MICRODISCA Web. 

 Oj UNTIA MICjaObCARPA K S. 

 i PI T TIA > ISSOURiUNSIS P DC. 

 OPUNTIA MONACANTHA Haw. 

 OPUNTIA NIGIUCANS Haw. 

 OPUNTIA OCC1DEN TALIS Engelm. 

 OPUNTIA OLIGACANTHA S. 

 OPUNTIA PALMERI Enge m. 



•' o nts oval, smooth (not tuberculatcd), 

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

 bread; puhini 2.5-3 cm apart, with pale 

 brownish or ^ray persistent wool, a few 

 very s'ender fctraw-colored bristles, and 

 f lender flattened or compressed straw-, 

 colored spines 2.5-3 cm long (5-7 on upper 

 pulvini with some srna.,er a Id.tional 

 ones. l-€ on lower i ulvini), erect or 

 Si. reading, 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 

 8-423. 



OPUNTIA PE^-CCRVI Le Cmte. 

 OPUNTIA Ph/iEAuANTHA Engelm. 

 OPUNTIA PiLIFERA Web. 

 OPlNTIA POi-YANTHA Haw. 

 OPUiviTIA PROCUMBENS E-B. 

 OPT 'NT I A PUBERUT A Pf. 

 OPUNTIA PYRRHACANTHA KS. 

 OP H NTT A QUIMILO KS. 

 OPUNTIA QUriENSIS WEb. 

 OPUNTIA RAFINESQUII Engelm. 

 OPUNTIA RHODANTHA KS. 

 OPUNTIA ROBUST A Wendl. 

 OPUNTIA RUtESCENS S. 

 OPUNTIA RUBRIFOLIA Engelm. 



'Pos'rate, with thick ovate jo nts 12-15 

 cm kng by 10 cm broad, not tuberculated; 

 leaves spreading, somewhat recurved, 

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

 apart, with brownish-gr^y persistent 

 wool and numerous yellowish bristle® (es- 

 pecially on ihe upper edge); spires often 

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

 tional smaller oner, all deflexed (almost 

 appress d ; lowers and fruit unknown. 

 Tyre, Palmer 3 ; n hb Mo bot gard. St. 

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

 OPUNTIA RUFIDA Engelm. 

 OPUNTIA RUTILA Nutt. 

 OPUNTIA SCHEERI Web. 

 OPUNTIA SENILIS Roezl. 

 OPUNTIA SETISPINA E. 

 OPUNTIA bPHAEROCARPA E-B. 

 OPUNTTA SPINULIFERA S. 

 OPUNTIA STREPTACANTHA Lem. 

 OPUNTIA STRIGILIS E. 

 OPUNTTA SULPHUREA Gill. 

 OVTJ-KTTA t-WNTTTPTTNA Engelm. 

 OPUNTIA TOMENTOPA S. 

 OPUNTTA " ORTISPINA E-B. 

 OPUNTIA TRE LEASH Coulter. 



"Erect, diffusely branching: joints or- 

 bicular ^o obmate, fl shy, with terete 

 base, 15-25 cm long: pulvini not depressed, 

 with long (5- cm) dense dirty-yellow bris- 

 tles: Paves on young shoots 5 mm long, 

 sr reading (m.o^e than twice as long as 

 th f s.e of I asi aris and darker-red): flower 

 and fruit not eeen. — Type, growing in Mo. 

 Rot Gard. P98, from collection made by 

 Trelease m 1892. At Caliente, in the Te- 



hachapl Mountains, California. Speci- 

 mens examined: California (Trelease of 



ix!2». Tins species is near 0. basilarls, 

 but differs In Its -rounder more fleshy 

 jelnts (terete below), pulvini not depress- 

 ed (iii o. basharis i here s a depn i Blon 

 Cor the pulvlnus with a furrow on either 

 side n Ihe genera surface), yellowish 

 I ri- ties, and esp cially In Its much larger 

 leaves," — Coulter i ontr > a hb 3:434-435. 

 OPUNTIA TIMACANTJIA P DC. 

 OPUNTIA TUNA Mill. 

 OPUNTIA. URSINA Weber. 



Opuntia ursina is a name given by 

 Albert Weber to a 'curious and beauti- 

 ful plant of the Mohave desert, adver- 

 tised as the Grizzly Bear cactus. The 

 joints are about 3 by 5 inches, densely 

 covered with slender ' fiexuous ivory 

 white spines, £he longest over 6 inches 

 long, and completely hiding the plant. 

 A cutting reminds one of the "Old 

 Man" cactus of Mexico, but this be- 

 longs among the prickly * pears — form- 

 ing low wide spreading masses of in- 

 terlacing snow white spines. 

 OPUNTIA VULGARIS Mill. 

 OPUNTIA XANTHOSTEMMA KS. 



Subgenus Peireskiopuntia. 



OPUNTIA BRANDFGEEI KS. 

 OPUNTIA GOLZIANA KS. 

 OPUNTIA PITITACHB Web. 



Subgenus Brasilopuntia. 



OPUNTIA BRASILIENSIS Haw. 



RHIPSALIS LUMBRIOOIDES Lem. 

 RHIPSALS MADAGASCARIENSIS Web. 

 R. MESEMBRIANHENOIDETS Haw. 

 RHIPSALIS MICRANTHA DC. 

 RHIPSALIS MINUTIFLORA KS. 

 RHIPSALIS MONACANTHA Gris, 

 RHIPSALIS MYOSURUS KS. 

 RHIPSALIS NEVES'-ARMONDII KS. 

 RHIPSALIS PACHYPTERA Pf. 

 Varie + y crassiohr S. 

 RHIPSALIS PARADOXA S. 

 RHIPSALIS PENDULTFLORA NEBr. 

 RHIPSALIS PENTAPTERA Pf. 

 RHIPSALIS PLATYCARPA Lem. 

 RHIPSALIS PULVINIGERA Lindb. 

 RHIPSALIS PUNICEO-DISCUS Lindb. 

 RHIPSALIS RA.MULOSA Pf. 

 RHIPSALIS REGNELLII Lindb. 

 RHTPSAT IS RHOMBEA Pf. 

 Variety CRISP ATA KS. 

 RHIPSALIS ACULEATA Weber. 

 RHIPSALIS AT ATA KS. 

 RHTPSALIS ANCFP9 Weber. 

 RHIPSALIS CAPILLIFORMIS Weber. 

 RHIPSALIS CAVERNOSA Lindb. 

 RHIPSALIS CLAVATA Weber. 

 RHIPSALIS COMORENSIS Weber. 

 RHIPSALIS CONFERTA S. 

 RHIPSALIS DISSIMILIS KS. 

 RHIPSALIS ELLIPTICA Lindb. 

 RHTPSALIS ELLTPTICA Lindb. 

 RHTPSALIS ERYTHROCARPA KS. 

 RHIPSALIS FLOCCOSA S. 

 RHIPSALIS GIBBERULA Weber. 

 RHIPSALIS GONACARPA Weber. 

 RHTPSALIS GRANDIFLORA Haw. 

 RHIPSALIS HADROSOMA Lindb. 



