SYNOPSIS OF THE CACTACEA OF THE UNITED STATES. 153 
Cerei (fifteen Hchinoceret, fourteen of which are peculiar, and one Lucereus, common also to other 
regions): and twenty-two Opuntie ; of these twelve are flat-jointed, four clavate, and five cylindrical 
ones; seventeen of these species are peculiar. 
6. THE Gita Recion, comprising the whole valley of the Colorado south of lat. 36°, [314] 
and the country of the Gila, its large southern tributary. This has thus far furnished 
thirty-six Cactacez, namely: five Mamillarie, three of them peculiar species: six Echinocacti, none 
of them found elsewhere: seven Cerei, representatives of each of our four subgenera, and five of them 
peculiar: eighteen Opuntie, of which six (all peculiar) belong to the Platopuntie, two to the clavate 
and ten to the cylindric Cylindropuntie ; one of the former and nine of the latter peculiar. 
7. THe CaLirorNIAN ReGion — namely, California west of the Sierra Nevada, and comprising 
the southwestern part of the present State of California — produces six Cactacew, five of which are 
peculiar. They are one Mamillaria: one Echinocactus: one Cereus of the section Hucereus: and 
three Opuntia, one of them a Platopuntia, — probably only a form of a more eastern species, — and 
two peculiar Cylindropuntie. . 
THE NORTHWESTERN REGION, comprising the northern parts of the State of California, the 
Territories of Utah, Oregon, and Washington. This region has so far furnished fey a single Opuntia 
(from eastern Oregon), common also to the Missouri region.— Mr. Geyer, in his account of his 
expedition to Oregon in 1843, mentions two Mamillarie and a “ Melocactus” 0, which latter he has 
not seen himself, nor are there any known specimens in existence. 
CORRECTIONS AND ADDITIONS. 
Page 267 =131. Mamillaria scolymoides has been collected by Mr. Wright, on the Pecos, in western Texas 
= 139. Cereus Berlandieri is very near C. pentalophus, DC., but Prince Salm, who has cultivated "hohk 
side by side, considers them well distinguished. 
300 = 146. a Missouriensis has been sent from Clear Water, on the Kooskooskie, in Oregon, by 
the Rev. Mr. Spalding 
CORRECTIONS AND ADDITIONS TO THE SYNOPSIS OF THE CACTACEZ OF THE UNITED STATES. 
On p. 279=136 the var. minor of Cereus dasyacanthus should be cancelled, and after C. longisetus, [345] 
p. 280 = 137, the following added :— 
93. C. Raerrert, E. in B. C. R.: ovato-cylindricus, 10-12-costatus ; areolis ovato-orbiculatis; aculeis e 
basi bulbosa subulatis-rubellis apice obscuris exterioribus 10-15, interioribus 2-5 robustioribus sub-brevioribus; [346] 
floribus subterminalibus magnis purpureis ; bacca subglobosa ; seminibus tuberculatis. 
El Paso, southward to the Sandhills: flowers April.— Stem 5-6 inches high ; spines 4-8 lines long; flower 
23-3 inches long. Similar to C. dasyacanthus, from which it is distinguished ties the fewer ribs, fewer and stouter 
spines, purple flowers, smaller fruit, and larger seed. This species is intermediate between the Pectinati and 
Decalophi. 
After Opuntia setispina, p. 294 = 143 : — 
O. Pes Corvi, Le Conte, mss.: articulis parvis teretiusculis ; pulvillis subconfertis setas paucas breves graciles 
flavidulas gerentibus plerisque armatis ; aculeis binis ternisve gracilibus sepe basi compressis tortisque; flore flavo 
minore. 
Sandy coast of Georgia (Major Le Conte), and Florida (Dr. Chapman). — Joints not much over an inch long, 
and half as thick ; spines 1-1} inches long, straight and slender. Flower 1} inches in diameter. Ovary only with 
5 areole ; stigmas 5.—In the shape of the joints this curious little species resembles O. fragilis, but in other respects 
it seems ‘neal between O. vulgaris and 0. tenwispina. 
20 
