47 3 
scabrellis, interioribus 4-7 complanatis, inferioribus deflexis latioribus 
supra striatis subtus carinatis, superiore triangulato erecto; aculeis 
exterioribus 8 - 10 gracilioribus undique radiantibus ; bacese pulvillis 
setosissimis ; seminibus rostratis. 
Santa Fe and Albuquerque, on the plateaux: fl. iii June and July. 
— Dense spreading masses, with joints 1J--2 inches long; tubercles 
6-8 lines long; larger spines 6-15 lines long, and the broadest one 
f- 1 J- lines wide. Flower 2 inches in diameter. Fruit yellow, lj-- 
lf inches long, an inch in diameter, covered with 30 - 50 large pul- | f 
villi. Seed 2£- 3 lines in the longest diameter. Cotyledons mostly 
oblique, or, as in most other Opuntice , 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. Parryi, E. in Sillim. Journ. 1852 : prostrata ; articulis ova- 
tis basi clavatis ; tuberculis oblongo-elongatis; setis paucis ; aculeis 
angulatis scabris rubellis demum cinereis, interioribus sub -4 validi- 
oribus compressis, exterioribus 4-8 divergentibus, extimis 6 -10 
gracilibus radiantibus; bacca ovata pulvillis sub-40 setosissimis stipa- 
ta ; seminibus erostratis. 
On the Mojave, west of the great Colorado. — Joints 2J- - 3 or 4 
inches long, attenuated below and somewhat so above; tubercles 9 
lines long ; inner spines 12 - 16 lines long, and the larger ones some¬ 
what flattened, but less than a line wide; exterior spines 3-8 lines 
long, in two series. Fruit 1J 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 by the shape of the joints, the 
narrower, darker-colored, more numerous spines, and the smaller and 
more regular seeds. 
31. O. Emoryi, E. in B. C. R.: articulis cylindricis basi clavatis 
glaucis; tuberculis oblongo-linearibus elongatis; setis paucis; aculeis 
plurimis rufis, interioribus 5-9 validioribus triangulatis, compressis, 
exterioribus 10-20 pi uriseriatis undique radiantibus ; floribus flavis 
extus rubellis ; bacca pulvillos 35- 50 setosissimos inferiores aculeo- 
latos gerentibus ; seminibus valde insequalibus irregularibus. 
Arid soil, from El Paso through Sonora to the desert of the Colo¬ 
rado : fl. August and September. — The stoutest species of this sec- 
411k. 
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