36 UNITED STATES AND MEXICAN BOUNDARY. 
wider, appearing very full from the broad (8-12 lines) and numerous petals of a bright purple 
or deep pink color, inclining to crimson. Ovary with only few spines (2-4 lines long) on each 
pulvillus; the spines on the tube more numerous and about twice as long. These spines increase in 
number and length during the growth of the fruit, so that at maturity we find 8 or 10 in each 
fascicle, 4 to 1 inch in length. Fruit 14-2 inches long, 1} inch thick, readily shedding the 
spines, purple, of a delicious taste, safatmediate between a strawberry and a gooseberry. The 
small seeds (0.5-0.7 line long) cannot be distinguished from those of the last species. The 
tubercles are large for the size of the seed and very distinct. 
12. C. pusrus (sp. nov.): ovato-cylindricus, pallide viridis, caspitosus ; costis 7-9 obtusis 
tuberculatis ; sinubus latis parum profundis; areolis orbiculatis remotis ; aculeis albidis subpel- 
lucidis, radialibus 5-8 teretibus seu subangulatis, superioribus sepe deficientibus, centralibus 
1-4 bulbosis angulatis elongatis rectis seu incurvis ; floribus lateralibus ; ovarii pulvillis 20 in 
squame triangularis axilla parce villosa aculeolos paucos breves gerentibus ; sepalis tubi inferi- 
oribus 16-20 ovato-lanceolatis cum aculeolis 1-3 longioribus; sepalis superioribus sub-10 
oblongo-spathulatis ‘obtusis ; petalis sub-10 spathulatis obtusis pallide purpureis ; stigmati- 
bus 8—10,; bacca subglobosa virescente-purpurea fasciculis aculeolorum 8-12 elongatorum 
deciduis armata ; seminibus globoso-obovatis obliquis confluento-tuberculatis, hilo circulari. 
(Tab. L.) 
Sandy bottoms of the Rio Grande, and from El Paso, Wright, Bigelow, to below Presidio, pve 
with Algarobia, Fouquiera, and Larrea; fl. June and July.—Stems 5-8 inches high, not so 
densely ceespitose as the last one, of a pale green color and soft flabby texture ; ribs few, broad ; 
grooves shallow; radial spines 6—12 or 15 lines long, lower ones longer than upper ones, or 
the upper spines very commonly entirely wanting, and replaced by the three upper central ones ; 
central spines 14-3 inches long, the lower one somewhat stouter and longer than the upper 
ones. Flower 24 inches long, of the same diameter ; petals fewer and narrower than in the last 
species, only 6 lines wide, paler, (rose-colored,) and anostly quite obtuse and almost entire. 
Ovary in this, as in the last species, remarkably small and undeveloped, while the flower is fully 
open; its spines few and short, growing afterwards in length and numbers more than is noticed 
in any other species. Ripe fruit 1-1} inch long, with 20-24 pulvilli, on each of them 
9-12 bristly spines, 4-9 lines long ; fruit green or rarely purplish, insipid or pleasantly acid. 
Seed larger than in the two last species, 0.6—0.7 line long, subglobose-obovate, with a circular 
hilum ; the tubercles not distinct as in the others, but confluent, and forming pits in the inter- 
_Stices.—These three species are very nearly allied, but are said to be easily distinguished in 
their wild state ; the characters given above are said to be quite constant, and. seem to establish 
them as good species. 
13. C. Eneenmannt, Parry in Sill. Journ. 1852: ovato-cylindricus, e basi parce ramosus ; 
costis 11-13 interruptis; areolis orbiculatis subconfertis, junioribus villosis ; aculeis radiali- 
bus 13 sub-angulatis albidis apice adustis rectis seu paullo curvatis, lateralibus 6 longioribus, 
inferioribus 3 vix brevioribus, superioribus sub-4 parvis; aculeis centralibus 4 angulatis gra- 
cilibus rectis multo longioribus, inferiore longiore albido porrecto seu deflexo, superioribys fulvis 
arrectis ; floribus sub apice lateralibus; ovarii pulvillis sub 30 aculeolos rigidos 8-14 gerenti- 
bus ; sepalis tubi inferioribus 15-20 ovato-lanceolatis ad axillam villosam aculeiferis ; petalis 
purpureis ; stigmatibus 12 erectis viridibus ; bacca ovata ; seminibus oblique obovatis tubercu- 
lato-foveolatis, hilo subbasilari oblongo. (Tab. LVII.) 
