6i 



Cacti.— Orcutt. 



62 



op: NTIA LETCOTRICHA P DC. 

 Opuntia lindnelmeri E. is iiirgelmannii. 

 OPUNTIA AIACROCENTRA Engelm. 

 OPUNTIA MACROKHIZA Engeim. 

 > PTNTIA MACULACANTHA F. 

 OPUNTIA Ml' RC'DASYS Pfeiff. 

 OPUNTIA MICRODISCA Web. 

 O-UNTIA MICi OPCARPA KS. 

 I Pr TIA J- ISSOURlENSIS P DC. 

 OPUNTIA MONAOANTHA Haw. 

 OPUNTIA NIGRICANS Haw. 

 OPUNTIA Ol'/^D-NTALIS Engeim. 

 OPUNTIA OLIGACANTHA S. 

 OPUNTIA PALMERI Enge m. 



". o nts oval, smozth (not tubercula-ted), 

 pale glaicous, 2U-25 cm long by 15-20 cm 

 bread; pulvini 2.5-3 cm apart, with pa-le 

 brownish or Lf^y persistent woo!, a few 

 very s'encer ttr£.w-colorcd bristles, and 

 ! 1. ndf r f?a lencd or connt)r£ssecI straws 

 colored spinec 2.5-3 cm long (5-7 en upper 

 pulv.ni with tome sma.er a :d tional 

 ones, 1-3 on lower 1 ulv'ni), erect or 

 s. read.rg, or the urper ones (from upper 

 jiart of pulvinus) mostly deflexed. Type, 

 Palmer of IS77 in hb Mo bot gard. Near 

 St. Ge:rg?, Utah."— Coulter, Cant Na hb 

 3-42'. 



OPUNTIA PE3-CCRVI Le C:nte. 

 OPUNTIA Ph/.EA-^ANTHA Engeim. 

 0?U>TIA iiLIFERA Web. 

 OPiNTIA PC" YANTHA Haw. 

 OPl.nTIA PROCUMBENS E-B. 

 OPT NTIA PUBERULA Pf. 

 OPI'NTIA PYRRHACANTHA KS. 

 OPTNT^A QUIMIUO KS. 

 OPU^ T a QUIIENSIS WEb. 

 OPUNTIA B m^TNESQUII Engeim. 

 OPUNTIA RHODANTHA KS. 

 OPUNTIA ROBUS^A Wendl. 

 OPT 'NT I A RUiiESCENS S. 

 OPT'NTI\ RUBRIFOLIA Engeln. 



'Pros'rate, with ^hick ovate 30 nts 12-15 

 cm 'ng 1 y 10 cm broal, not tube- culated; 

 Tea'ces sr.rear?ing, somev.'hat recurved, 

 reddish, 8-10 n-m Icng; pulvini 2-2.5 cm 

 apart, with brownish-gr^y persistent 

 wo:l and numerous ye', owish bristles (es- 

 pec'ally on ^hs upper edge); spires often 

 '" is' d. ?.?-6 cm long, often a few addi- 

 tional ■ smaller one=, all deflexeil (almost 

 a-opressd ; 'or, e s and fruit unknown. 

 Tyre, Pfilmer 3 n hb Mo bot gard. S-t. 

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

 OPUNTIA RUFIDA Engeim. 

 OPUNTIA RUTID.\ Nutt. 

 OPUNTIA SCHEERI Web. 

 OPUNTIA SENILIS Roezl. 

 OPUNTIA SETISPfNA E. 

 OPUNTIA JL PHAEROC M^PA E-B. 

 OPUNTIA SPINULIFERA S. 

 OPU-NTIA STREPTACANTHA Lem. 

 OPT'NTI.A. STRIGILIS E. 

 OPUN'TJA SULPHUREA Gill. 

 o-pTj— riA T-RXT-i'^^TNA Engeim. 

 OPTNTIA TOMENTO?A S. 

 OPUNT'A " ORTI3PINA E-B. 

 OPUNTIA TREI.EASII Coulter. 



"E ect. diffusely branching: joints or- 

 bicular to olcvate, fl shy, with terete 

 ba=e, ]j:-25 cm long: puivini not depressed, 

 with 'ong (5- cm) dense dirty-yellow bris- 

 tles: leaves nn young shoots 5 mm long, 

 sTead'ng (more than twice as long as 

 th' se of lasi aris and darker-red): flower 

 and fruit net 'een. — Type, growing in Mo. 

 Bot Gard. 1^93, from cillection made by 

 Trelease in 1892. At Caliente, in the Te- 



hachapi Mountains, California. Speci- 

 mens examined: California (Trelease of 

 1S;2>. This species is rear O. basila-is, 

 but differs in its rounder more fleshy 

 joints (terete below), pulvini not depress- 

 ed (in O. basi'aris there s a depression 

 for the pulvinus with a furrow on either 

 side 'n the genera surface), yellowish 

 Vri ties, and esp cially in its much larger 

 leav( s.'— Coulter (^ontr ^ a hb 3:431-435. 

 OPUNTIA TRIACANiHA 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 flexuous ivory 

 white spines, fhe 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 XANTHObTEMMA KS. 



Subgenus Peireskiopuntia. 



OPt'NTIA BRANDFGEEI KS. 

 OPUNTIA GOLZIANA KS. 

 OPUNTIA PITITACHB Web. 



Subgenus Brasilopuntia. 



OPUNTIA BRASILIENSIS Haw. 



RHIP9ALIS LUMBRICOIDES Lem. 

 RHIPSALS MADAGASCARIENSIS Web. 

 R. MESE!MBRI.\NHKNOIDETS Haw. 

 RHIPSALIS MiCRANTHA DC. 

 RHIPSADIS MINUTIFLORA KS. 

 RHIPSALIS MONACANTHA Gris. 

 RHIPSALIS MYOSUKUS KS. 

 RHIPSALIS NEVES-ARMONDII KS. 

 RHIPSALIS PACHYPTERA Pf. 

 Variety crassiohr S. 

 RHlPriALIS PARADOXA S. 

 RHIPSALIS PENDULIFLORA NEBr. 

 RHIPSALIS PENTAPTERA Pf. 

 RHIPSALIS PLATYCARPA Lem. 

 RHIPSALIS PULVINIGERA Lindb. 

 RHIPSALIS PUNICEO-DISCUS Lindb. 

 RHIPSALIS RAMULOSA Pf. 

 RHIPSALIS REGNELLII Lindb. 

 RHIPSAT IS RHOMBEA Pf. 

 Variety CRISPATA KS. 

 RHIPSALIS ACULBATA Weber. 

 RHIPSALIS AT ATA KS. 

 RHIPSALIS ANCFPS Weber. 

 RHIPSALIS CAPILLIFORMIS Weber. 

 RHIPSALIS CAVERNOSA Lindb. 

 RHIPSALIS CLAVATA Weber. 

 RT^IPSALIS C(^MORENSIS Weber. 

 RHIPSALIS CONFERTA S. 

 RHIPSALIS PISSIATILIS KS. 

 RHIPOALIS ELLIPTICA Lindb. 

 RHIPSALIS ELLIPTICA Lindb. 

 RHIPSALIS ERYTHROCARPA KS. 

 RHIPSALIS FLOCCOSA S. 

 RHIPSADIS GIBBERUDA Weber. 

 RHIPSALIS GONACARPA Weber. 

 RHIPSALIS GRANT>IFLORA Haw. 

 RHIPSALIS HAX>R090MA Lindb. 



