SYNOPSIS OF THE CACTACEA OF THE UNITED STATES. 147 
Fertile prairies, or sterile places, on the upper Missouri and Yellowstone, to the mountains and south to [302] 
Santa Fé.— Size and shape of the joints variable; fruit-bearing joints compressed, 14-2 inches long, 1-1} wide, 
and 3-3? thick; others smaller and more tumid. Leaves a line long, hadly longer than the large pulvilli,red. Pulvilli 
4-6 lines apart, bristles very few, short, whitish, on the old joints a little more numerous, coarser, r, dirty yellow. 
Lower radiating spines 2-4 lines long ; central spines 6-10 lines long, the other interior spines 3-8 lines long, often 
similar to the smaller lower spines. Fruit rather fleshy through the winter, getting dry in spring, seats an inch long, 
with 20-25 pulvilli, of which only the upper ones bear a few short spines. Seeds few, usually only 5 or 6 in each 
fruit, 3 lines in diameter, with a wide and thick obtuse corky margin. — Often sterile, but abundantly propagated by 
the fragile joints. 
. O. BracnyarTHRA, E. & B. 1c. : adscendens ; articulis ovatis orbiculatisve tumidis seepe subglobosis tuber- 
culatis ; pulvillis confertis parce setulosis; aculeis 3-5 validioribus 1-2 fuscatis ae s vel suberectis, ceteris deflexis; 
floris parvi ovario subgloboso pulvillos 12-15 vix aculeolatos gerente ; stigmatibus 
Inscription Rock near Zuni.— The short and tumid joints (10-15 lines a resemble the joints of a finger; 
the pulvilli 2-4 lines apart, even in the oldest eo of the plant with very few bristles; longer spines 9-12 lines 
long, terete. Ovary less than half an inch long. wer apparently an inch in diameter. — Perhaps too near O. fra- 
gilis ; but in the absence of good flowers and fruit, it is iat to say whether it does not belong to even a different 
section, perhaps to the Glomerate, Salm. 
Subgen. 3. Cytrnpropuntia, E. in B. C. R. Articuli cylindracei: flores magni vel parvi: bacca plerumque 
sicca: semina immarginata seu vix marginata: embryo circa albumen copiosius subcircularis; cotyledones contrarie 
seu oblique, subinde parallele. 
§ 1. CLavat#: prostrate : articuli breves, clavati, adscendentes, textura lignosa laxe reticulata : flores flavi majusculi : 
acca sicca, pulvillis numerosis setosissimis stipata, floris rudimentis persistentibus coronata. 
. O. cLAvaTA, E. in Wisliz. Rep. : articulis breviter clavatis lete viridibus ; tuberculis ovatis ; foliis 
subniatis minutis ; aculeis albidis scabrellis, interioribus 4-7 complanatis, inferioribus deflexis naeniiex supra [303] 
striatis subtus carinatis, epee triangulato erecto ; aculeis exterioribus 8-10 gracilioribus undique radiantibus ; 
bacce pulvillis setosissimis ; seminibus rostratis. 
é and ‘Soarcane on the plateaux: flowers in June and July. — Dense spreading masses, with joints 
1}-2 inches long; tubercles 6-8 lines long; larger spines 6-15 lines long, and the broadest one 3-14 lines wide, 
Flower 2 inches in diameter. “esi yellow, 13-1} inches long, an inch in diameter, covered with 30-50 large pulvilli. 
Seed 23-3 lines in the longest diameter. Cotyledons mostly oblique, or, as in most other Opuntia, incumbent. 
(The expression is not etymologically correct, but I use it to designate the direction of the face of the cotyledons 
towards the radicle 
30. O. Parry, E. in Sillim. Journ. 1852: prostrata ; articulis ovatis basi clavatis ; tuberculis oblongo- 
elongatis ; setis paucis; aculeis angulatis scabris rubellis demum cinereis, interioribus sub-4 vididiosibias compressis, 
exterioribus 4-8 divergentibus, extimis 6-10 gracilibus radiantibus; bacca ovata pulvillis sub-40 setosissimis stipata ; 
—— erostratis 
On dere west of the great Colorado. — Joints 23-3 or 4 inches long, attenuated below and somewhat so 
above ; He 9 lines long ; inner spines 12-16 lines long, and the larger ones somewhat flattened, but less than a 
line wide; exterior spines 3-8 lines long, in two series. Fruit 14 inches long. Seeds about 2 lines in diameter. — 
The original specimens of Dr. Parry were found farther south, near San Felipe. He describes the joints as 4-8 inches 
long, with shorter whitish spines or tubercles 6-12 lines long, and the flower as greenish-yellow. The Mojave plant is 
nearly allied to the last species, but may be distinguished ty the shape of the joints, the narrower, darker-colored, 
more numerous apis, and the smaller and more regular seeds. 
oryI, E. in B. C. R.; articulis lind basi clavatis glaucis ; tuberculis oblongo-linearibus elon- 
B; Peta; aculeis plurimis rufis, interioribus 5-9 validioribus triangulatis, com pressis, exterioribus 10-20 
Pa ebtidss undique radiantibus ; floribus aaice extus rubellis; bacca pulvillos 35-50 setosissimos ‘inferiores aculeo- 
latos gerentibus ; seminibus valde ineequalibus irregularibus. 
Arid soil, from El Paso through Sonora to the desert of the Colorado : flowers August and September. — 
The stoutest species of this section. Joints 4-6 inches long, curved, 1-14 inches in diameter; tubercles [304] 
1-1} inches long ; longest spines 1}-2} inches long, 3-1 line wide; the exterior spines gradually soustler, and 
less angular. Fruit 2-2} inches oe partly armed ‘with spines 4-8 lines long. Seeds from 2} to 3} lines in diameter. 
Cotyledons oblique or accum 
32. O. Scnortu, E. 1. c.: articulis clavatis; tuberculis elongatis ; pulvillis pauci-setosis; aculeis rubellis 
