57 



Cacti. -Orcutt 





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 Ion;;. 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 wes 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 climate 

 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 1 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. 

 OPUNTIA AUSTRALIS Web. 

 OPUNTIA BERNARDINA Engelm. 



OPUNTIA BIGELOVII Engelm. 



"Ramis erectis adscendentibusve; ar- 

 ticulis ovato-cylindricis pallide virescen- 

 tibus congestis; tuberculis subhemi- 

 sphaericis 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 branch* s foi nun.", a dense con 

 traded head, with [oints 2-6 / long; tu- 

 bercles 3 4 lines long; large! spines are 



about \ f long, sftialler ones ,| y lines 



long " — E Am ac pr 3:307. 



OPUNTIA BRACHYARTHRA JO. & B. 

 OPUNTIA m J Li : 1 SPIN A E. 

 OPI nti A CEREFORM IS Web. 

 OPUNTIA C'HOLi A Web. 

 OPUNTIA CIRIBB E. 

 OPUNTIA CLAVARXOIDE'S L-O. 

 OPUNTIA ( LAV ATA 10. 

 OPLN'LIA ( ORKIJGa'JA S. 

 OPUNTIA CUHASSAVICA Mill. 

 OPUNTIA CYLIN DRICA DC. 

 OPUNTIA DARWINII Hensl. 

 OPUNTIA DAVIS.II E. & B. 

 OPUNTIA DIADPOMATA Lem. 

 OPUNTIA ECHINOCARPA E. & B. 

 OPUNTIA EMORYI Engelm. 

 OPUNTIA FLOCCOSA S. 

 OPUNTIA FRAGILIS 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 KLEINIAE P DC. 

 OPUNTIA LEONINA H-S. 

 OPUNTIA LEPTOCAULIS D C. 

 OPUNTIA -LURIDA Hort. 

 OPUNTIA MAMILLATA Schct. 

 OPUNTIA. MIQUELII Monv. 

 OPUNTIA MOLESTA Brandegee. 

 OPUNTIA NiGRISPINA KS. 

 OPUNTIA OVATA Pf. 

 OPUNTIA PARISHII Orcutt. 

 OPUNTIA PARRYI E. 

 OPUNTIA PENTLANDII S. 

 OPUNTIA PLATYACANTHA S, 

 OPUNTIA PPOTIFEPA Engelmann. 

 OPUNTIA FULCHELLA E. 

 OPUNTIA PYCNACANTHA B. 

 Opuntia ramos'ssima B, is tessellata. 

 OPUNTIA ROSEA DC. 

 OPUNTIA ROFIFLORA KS. 

 OPUNTIA ROTUNDIFOLIA KS. 

 OPUNTIA SALMIANA Parm. 

 OPUNTIA SCmCKENDANTZII Web. 

 OPUNTIA SOHOTTII E. 

 OPUNTIA SERPENTINA Engelmann. 

 OPUNTIA SPEGAZZINII Web. 

 OPUNTIA SPINO'SISSTMA Mill. 

 OPUNTIA STAPBL1AE P DC. 

 OPUNTIA SUBUuATA Engelm. 

 OPUNTIA TARAPACANA R A Phil. 

 OPUNTIA TERES Cels. 



OPUNTIA TESAJO Engelm. 



"With very short woody stem, and 

 growing in little clumps 3 dm or less in 

 diameter; joints slender and not distinctly 

 tuberculate; flowers simple, bell-shared, 

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

 Among rocks, especially toward the west 

 coast and in the more central portions', 

 Lower Calif oirnia." — Coulter, Cont Na hb 

 3-448. 



OPUNTIA TESSELLATA Engelm. 

 OPUNTIA THURBERI E. 

 OPUNTIA TUNICATA L-O. 

 OPUNTIA VERSCHAFFELTII Cels. 

 OPUNTIA VERSICOLOR E. 

 OPUNTIA VESTITA S. 



