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low shrub, 6-18 inches high; joints 1 - 2^ inches long ; tubercles 
4 - 5 lines long ; spines not over an inch in length. Flower appar¬ 
ently yellow, about 1J inches in diameter and somewhat persistent on 
the fruit. Fruit very shallow, saucer-shaped, with few large seeds. 
Yar. /3. is 4 or 5 feet high ; joints 8 - 10 inches long; interior spines 
1 - If inches long. Fruit globose or even ovate, with 25 pulvilli. 
Seeds the same in both. 
37. O. serpentina, E. in Sill. Journ. 1852 : erectiuscula seu sub¬ 
prostrata ; articulis elongatis cylindricis; tuberculis ovatis ; aculeis 
7-9 albido- seu rufido-vaginatis; flore flavo extus rubello; bacca 
subhemisphserica late et profunde umbilicata villosa aculeatissima. 
Near the sea-coast about San Diego, California. — Sometimes 4-5 
feet high, but often prostrate ; joints 6-12 inches long ; spines less 
than one inch long. Flower cup-shaped, 1J- inch wide. Fruit ap¬ 
parently like that of the last species, but “ long woolly ” and with 
fewer pulvilli, also often crowned with the persistent flower.. Seed 
unknown ; said to be large. — Closely allied to the foregoing species. 
Can this be Nuttall’s Cactus Californicus (Cereus, Torr. fy Gr. FZ.), 
with cylindric branches, yellow flower, and spiny fruit ? 
ft Decidua : arborescentes : articuli tumidi, perfragiles: tubercula 
depressa : flores purpurei: baccse saepissime steriles, proliferae. 
38. O. prolifera, E. l. c. : ramis divaricatis; articulis ovatis seu 
ovato-cylindricis perviridibus versus ramorum apicem congestis; tu¬ 
berculis obovato-oblongis prominulis; aculeis 8-10 obscuris strami- 
neo- seu rufo-vaginatis, singulo centrali, cseteris patulis ; flore rubro ; 
bacca ovata aculeolata plerumque sterili prolifera. 
On arid hills about San Diego, California, forming extensive thick¬ 
ets. — Stems 2-4, and sometimes even 6-7, inches in diameter, 3- 
10 feet high ; joints 3-6 inches long and 1^-2 in diameter ; tuber¬ 
cles about 6 lines long; spines 6-14 lines long, the lower ones 
shorter. Flowers red, salver-form, 1| inches in diameter. 
39. O. fulgida, E. in B. C. B,.: ramis divaricatis ; articulis ovatis 
seu ovato-cylindricis glaucescentibus versus ramorum apicem conges¬ 
tis ; tuberculis ovato-oblongis prominulis ; aculeis 5-9 subaequalibus 
laxe vaginatis undique stellato-porrectis ; flore purpureo parvo; bac¬ 
ca ovata inermi vix tuberculata ; seminibus parvis rostratis. 
Mountains of Western Sonora : fl. July and August. — Plant 5-12 
feet high ; joints 3- 8 inches long ; tubercles rather elongated, 6-7 
8 9 10 Missouri 
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