SYNOPSIS OF THE CACTACEA OF THE UNITED STATES. 149 
said to be large. — Closely allied to the foregoing species. Can this be Nuttall’s Cactus Californicus (Cereus, 
Torr. & Gr. Fl.), with cylindric branches, yellow flower, and spiny fruit ? 
tt Decidue: arborescentes: articuli tumidi, perfragiles: tubercula depressa: flores purpurei: bacce sepissime 
steriles, proliferee. 
38. O. protirEeRA, E. 1. c.: ramis divaricatis ; articulis ovatis seu ovato-cylindricis perviridibus versus ramorum 
apicem congestis ; tuberculis obovato-oblongis prominulis; aculeis 8-10 obscuris stramineo- seu rufo-vaginatis, singulo 
centrali, cxwteris patulis; flore rubro ; bacca ovata aculeolata soni sterili prolifera 
n arid hills about San Diego, California, forming extensive thickets. — Stein 2-4, and sometimes even 
6-7 inches in diameter, 3-10 feet high ; joints 3-6 inches long a a 13-2 in diameter ; tubercles about 6 lines long; 
spines 6-14 lines long, the lower ones shorter. Flowers red, salver-form, 14 inches in diameter 
O. FuLGIDA, E. in-B. C. R.: ramis divaricatis ; articulis ovatis seu ovato-cylindricis samme versus 
morum apicem congestis; tuberculis ovato-oblongis prominulis 5 ; aculeis 5-9 subequalibus laxe vaginatis undique 
stellato-porrectis ; flore purpureo parvo ; bacca ovata inermi vix tuberculata ; seminibus parvis rostratis. 
Mountains of western Sonora: flowers July and August. — Plant 5-12 feet high; joints 3-8. inches 
long; tubercles rather elongated, 6-7 lines long; spines 1-1} inches “a hiding the whole plant with their [307] 
Tusteue sheaths. Flower about an inch or less in diameter. Fruit fleshy, 1-1} inches long, usually sterile. 
Seeds smaller than in any other th examined, 1-14 lines lon 
40. O. BiaeLovu, E. in P. R. R.: ramis erectis adscendentibusve ; articulis ovato-cylindricis pallide virescentibus 
congestis ;_ tuberculis oa eersenstia depressis confertis ; aculeis 6-10 robustioribus et totidem gracilioribus 
oe ovario tuberculato ; bacca tuberculata subinde (sterili?) aculeolata; seminibus parvis. 
illiame’s River, of the Californian Colorado, — Stem 3-4 inches thick and 10-12 feet high, the branches 
ian dense contracted head, with joints 2-6 inches long; tubercles 3-4 lines long ; larger spines about an inch 
long, smaller ones 4~7 lines lon ng. 
The three foregoing species represent. this subsection west “of the California mountains, and east of them both 
south of the Gila and north of it, and seem to be well distinguished from one another by the characters indicated. 
ttt Cristate: frutescentes vel arborescentes: articuli cylindrici: tubercula ee cristata prominula: flores 
purpurei : baccze inermes seu rarius aculea 
41. O, Wuippiei, E. & B. in P. R. R.: caule erecto seu rarius se ae divaricato-ramoso ; articulis 
cylindricis ; tuberculis ovatis Pasi ad aculeis brevibus cinereo- seu stramineo-vaginatis, 1-4 majoribus, 2-8 breviori- 
bus deflexis vel aig ; flore rubro ; subg one tuberculata flava inermi; seminibus regularibus 
ar. vior : humilior, wala paucis deflexi 
Var, 8. SPINOSIOR : elatior, aculeis plurimis a a 
From Zuni westward to Williams’s River. (a.), and south of the Gila (8.): flowers in June. — The first state 
is from a few inches to 3-6 feet high ; the second forms small trees 8-10 feet high. Joints 4-} inch in diameter ; 
tubercles about 5 lines long ; spines very variable, between 3 and 9 lines long. Flower (of var. 8.) 13-14 inches in 
diameter. Fruit about an inch long. 
42. QO. ARBORESCENS, E. in Wisliz. Rep. (0. stellata, Salm): arborescens ; ramis verticillatis horizontalibus vel 
pendulis ; articulis bearer cylindricis ; tuberculis cristatis prominentibus ; aculeis 8-30 os ; flore 
purpureo magno ; subhemispherica tuberculato-cristata flava inermi ; seminibus regulari 
From north its east of Santa Fé and the Llano Estacado, to Zuni; extending iat deep into Satis 
Mexico: flowers May-July. — Norhwart 5-6, south 10-20 or more feet high ; easily characterized by th 
horizontal and verticillate branches, etc. 
43. O. acantHocaRpa, E. & B. in P. R. R.: arborescens; ramis alternis adscendentibus ; articulis cylin- 
dricis ; tuberculis elongatis; aculeis aa stellato-divaricatis ; bacca subglobosa tuberculata aculeata; seminibus 
aoe 3. 
untains of Cactus Pass, between Santa Fé and the western Colorado. — Stems 5-6 feet high; branches few, 
Socata. and separating from the stem at an acute angle. Joints (as in the preceding) 4-6 or 8 inches long, about 
an inch in diameter ; tubercles 9-10 lines long ; interior spines 1-1} inches, exterior ones 4-10 lines long. Spines of 
fruit on the depressed tubercles 3-6 lines long. Seeds large, unlike those of any other Opuntia seen by me. 
O. MamiLiata, A. Schott in litt., B. C. R.: arborescens, divaricato-ramosissima ; articulis crassis abbreviatis 
Sencar ; tuberculis tumidis ; aculeis 4-6 brevibus plerisque deflexis; fiore parvo purpureo; bacca obovata 
inermi; seminibus parvis. 
