57 



Cacti.— Orcutt 



58 



ally fewer on the under side of the 

 branchlets; spines horn-colored, with 

 straw-colored loose sheaths, from 3-10 

 lines, generally about 6 lines long. Flow- 

 ers purple, 3^ in diam; stamens red; fruit 

 about i' long, yellow. 



' On Waggon-mound the first (flower- 

 less) specimens of a strange Opuntia 

 were found, with an erect, ligneous 

 stem, and cylindrical, horridly spinous 

 horizontal branches. The plant WcS here 

 only 5 ft high, but grows about Santa Fe 

 to the height of 8 or 10 ft, and continues 

 to be found as far as Chihuahua and Par- 

 ras. In the latter more favorable ciimite 

 it grows to be a tree of 20 or 30, and 

 perhaps even 40 feet high, as Dr. Wisli- 

 zenus informs me, and offers a most 

 beautiful aspect when covered with its 

 large red flowers. It is evidently the 



plant which Torrey and James doubtful- 

 ly, though incorrectly, refer to Cactus 

 Bleo HBK. It is nearly allied to Opun- 

 tia furiosa, Willd. but well distinguished 

 from it; * * * the tree cactus, or Focon- 

 oztle, as called by the Mexicans, accord- 

 ing to Dr. Gregg. The stems of the 

 dead plant present :i most singular ap- 

 pearance; the soft parts having rotted a- 

 way. a net-work of woody fibres re- 

 mains, forming a hollow tube, with very 

 regular rhombic meshes, which corre- 

 spond with the tubercles of the living 

 plant." — E Wislizenus' report, 90. 

 OPUNTIA ARBUSCULA E. 

 OPUKTIA AUSTRALIS Web. 

 OPUNTIA BERNARDINA Engelm. 

 OPUNTIA BIGELOVII Engrelm. 



"Ramis erectis adscendentibusve; ar- 

 ticulis ovato-cylindricis pallide virescen- 

 tibus congestis; tuberculis subhemi- 

 sphsericis depressis confertis: aculeis 6- 

 10 robustioribus et totidem gracilioribus 

 inferioribus; ovario tuberculato; bacca 

 tuberculata subinda (sterili!) aculeolata; 

 seminibus parvis. 



"On William's river of the Californian 

 Colorado. Stem 3-4' thick and 10-12 ft 



high, the branches forming a dense con- 

 tracted head, with joints 2-6^ long; tu- 

 bercles 3-4 lines long; larger spines are 

 about \' long, smaller ones 4-7 lines 

 long." — E Am ac pr 3:307. 



OPUNTIA BRACHYARTHRA E. & B. 

 OPUNTIA BULBISPINA E. 

 OPUNTIA CEREFORMIS Web. 

 OPUNTIA CHOLL.A Vveb. 

 OPUNTIA CIRIBE E. 

 OPUNTIA CLAVARIOIDES L-O. 

 OPUI\TIA CLAVATA E. 

 OPLNilA CORRUGa'IA S. 

 OPUNTIA CLKASfeAVICA Mill. 

 OPUNTIA CYLINDRICA DC. 

 OPUNTIA DARWINII Hensl. 

 OPUNTIA DAVISII E. & B. 

 OPl NTIA MADEMATA Lem. 

 OPUNTIA ECHINOCARPA E. & B. 

 OPUNTIA EMORYI Engelm. 

 OPCNTIA PLOCCOSA S. 

 OPUNTIA FRAOlLi8 Haw. 

 OPUNTIA FULGIDA Engelm. 

 OPUNTIA GEISSEI R A Phil. 

 OPUNTIA GRAHAMII Engelm. 

 OPUNTIA GRATA R A Phil. 

 OPUNTIA IMBRICATA P DC. 

 OPUNTIA INVICTA Brandegee. 

 OPUNTIA KUEINIAE P DC, 

 OPUNTIA LEONINA H-S. 

 OPUNTIA LEPTOCAULIS D C. 

 OPUNTIA LURIDA Hort. 

 OPUNTIA MAMILLATA Schct. 

 OPUNTIA MIQUELII Monv. 

 OPUNTIA MOL.ESTA Brandegee, 

 OPUNTIA NiGRISPINA KS. 

 OPUNTIA OVATA Pf. 

 OPUNTIA PARISHII Orcutt. 

 OPUNTIA PARRYI E. 

 OPUNTIA PENTLANDII S. 

 OPUNTIA PLATYACANTHA S. 

 OPUNTIA PROLIFEPA Engelmann. 

 OPITNTIA PULCHELL.A E. 

 OPUNTIA PYCNACAN'i'HA B. 

 Opuntia ramosissima E, is tessellata. 

 OPUNTIA ROSEA DC. 

 OPUNTIA ROSIFLORA KS. 

 OPUN^'IA ROTLNDIFOLIA KS. 

 OPUNTIA SALMIANA Parm. 

 OPUNTIA 9CHICKENDANTZII Web. 

 OPUNTIA SCHOTTII E. 

 OPUNTIA SERPEiNTINA Engelmann. 

 OPUNTIA SPEGAZZINII Web. 

 OPUNTIA SPINOSISSIMA Mill. 

 OPUNTIA STAPBLIAE P DC. 

 OPUNTIA SUBU..ATA Engelm. 

 OPUNTIA TARAPACANA R A Phil. 

 OPUNTIA TERES Cels. 

 OPUNTIA TESAJO Engelm. 



"WWJh 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 gard. 

 'Among rocks, especially toward th"e west 

 coast and in the more central portions'. 

 Dower California."— Coulter, Cont Na hb 

 3-448. 



OPUNTIA TESSELLATA Engelm. 

 OPUNTIA THURBERI E. 

 OPUNTIA TUNICATA L-O. 

 OPUNTIA VBRSCHAPFELTII Cels. 

 OPUNTIA VERSICOLOR E. 

 OPUNTIA VESTITA S. 



