338 Dr. Engelmann on the Cereus giganteus of California. 
matibus 3; bacca —- pyriformi ; seminibus nigris hilo spon- 
SS. fusco auctis 
an Diego to the junction of the Gila with the Colorado. 
: enbe: Goodrichii, Scheer, obtained on the island of Cerro on the 
coast of California, is distinguished by the lower central spine 
aq being oo by much smaller tubercles, etc. 
Th INocactus virmpEscens, Nutt. Depressed ; berry sub- 
slat 5 gileat coated with lunate membranaceous ‘scales, On 
dry hills and ridges near San Diego. - + 
3. E. vinipescens, 2? CYLINDRACEUS, » is distinguished by its 
Se or cylindrical shape, larger size, longer spines. Found near 
ipe, on the eastern.slope o of the California mountains. 
raised from seed in Europe. 1 am informed that neither the 
iva nor the native Srealty of these seedlings is satisfactorily 
know 
4. On rus Emoryi, n. sp.: caule prostrato; ramis erectis cyl- 
indraceis 15-costatis; aculeis aang 0-60, centrali singulo 
robustiore porrecto; bacca globosa spinv 4 
In thick patches, on dry hills near ike sea shore, about the’ 
boundary line. Erect branches 6-9 inches high. 
eLMANNI, Parry in litt.: caulibus pluribus pe 
bus; costis 13 tuberculatis ; aculeis 4 centralibus eset se 
diales tenuiores superantibuss ; bacca ovali aculeata pulpo 
Mountains about San Felipe, on the eastern deeliggty ja the 
Cordilleras. 
Note.—C.? Cautrornicus, Nutt. in Torr, and Gray’s Flora, 
is most probably a cylindraceous eigen with “small yellow 
flowers,” which [ cannot now iden 
. Opuntia Ence_mannt, Salm. ste Diego, on oy 7 hillsides, in 
patches, 410 6 feet high. Originally discovered abont Chihua- 
hua, this species appears to extend westward to the Pacific. 
7. O. Tuna, Mill., is cultivated for fences, and naturalized — 
abont the pager called “Tuiia.” It is 10-15 2 high ; ies 
fruit large and edible. 
O. PROLIFERA, 0. sp.: caule erecto ligneo smulis eylindri 
cis aerate divaticans ; aculeis avid vaginatis ; bacca spin- 
San Diego, on arid hills and in dey creek beds. Plant 3-8 
feet high, forming impenetrable thickets. Near O. arborescens of 
New Mexico; but the red flowers ae the berry spinous, etc. 
9. O. seRPenTiNA, n. sp.: procumbens; articulis cylindricis 
elongatis tuberculatis ; aculeis 7~9 vaginsities bacea sicca hemis- 
rica aculeatissima. 
hillsides, San Diego. 
