442 
EXPLORATIONS ACROSS THE GREAT BASIN OF UTAH. 
0. rutila, Nutt, in Torr. & Gray Flor. 1, p. 555. Joints 5 inches long, half as wide, 
obovate; leaves 1 i lines long; areolae closely set with long straw-colored bristles; 
lower ones with few and short white spines, upper ones with numerous grayish-red" 
spines, 1^-2 inches in length. Flowers pale straw-colored, 2<]-8 in diameter; ovary 
1 inch long, with 20—30 white woolly aculeolate areolae; exterior sepals oblanceolate, 
squarrose, or recurved at the elongated tip; petals obovate, obtuse, crenulate; style 
with 8 or 10 short erect stigmas, longer than the stamens. The squarrose tips of the 
sepals are particularly conspicuous on the bud. 
Opuntia Missoubiensis, De Card. Prod. 3, p. 472; Torr. & Gray, FI. 1, p. 555 ( in 
part)-, Cactus ferox, Nutt. Gen. 1 , p. 296. 
From the deserts of Salt Lake Yalley to Rush Valley; specimens without flower 
or fruit. Joints small (2—3 inches long), broadly obovate or circular; areolae closely 
set; spines numerous, stiff, stout, angular, white, mostly deflexed. 
Opuntia Missoubiensis, var. albispina, Engelm. & Bigelow, l. c.. p. 46; t. 14, fs. 
8-10; Syn. Cact. p. 44. 
Smith Creek, Lookout Mountains, in Western Utah; flowering in July. By their 
slender flexuous spines, the specimens approach to var. trichophora. Flowers 3-3 
inches in diameter, bright golden-yellow; ovary 1 inch long, with 20 or 25 areolae, 
scarcely spiny; exterior sepals obovate, cuspidate; petals about 8, obtuse, crenulate; 
style shorter than the stamens; stigmas about 5, very short, erect. Some flowers have 
elongated and very spiny ovaries, evidently abortive. 
Opuntia feagilis, Haworth, Suppl. p. 82; Torr. & Gray, FI. 1, p. 555; Synops. Cact. 
p. 45; Cactus fragilis, Nutt. Gen. 1, p. 296. . 
Fort Kearny to the North Platte country; in flower in June and July. This is, 
I believe, the first time that the flowers of this species were collected since Nuttall’s 
discovery of it in 1813. Travelers report that the plant is very frequently seen in the. 
sterile prairies east of the Rocky Mountains, but that it is rare to find them in flower 
and rarer still in fruit. Since many years I have the plant in cultivation from speci¬ 
mens brought down by Dr. Hayden, but have not been able to get it to flower. 
Nuttall only informs us that the flowers are solitary and small. In the specimen 
before me, they are yellow, scarcely 2 inches in diameter; ovary 8-9 lines long; the 
13-15 areolse are densely co-wed with thick white wool; the upper ones bear a few 
white spines; lower sepals broadly oval, with a short cusp; petals 5, obovate, rounded, 
crenulate; style longer than the stamens; stigmas 5, short, erect, cuspidate.* 
Through the kindness of Dr. A. W. Chapman, of Apalachicola, Fla., I have received living specimens and fruit 
of 0. Pes Corvi, so that I can now complete the description of this very distinct southern species. 
Opuntia Pes Corvi, Le Conte in herb. Engelm.] Append, to Synops. Cact. in Proceed. Am. Acad. Arts $ Sc. 8, p. 346; Chap¬ 
man, FI. South. U. S. p. 145: diffusa, laete viridis; articulis parvis ovatis seu obovatis tumidis sa?pius teretiusculis con- 
catenatis fragilibus; pulvillis subdistantibus pulvinatis; foliis teretiusculis ovatis cuspidatis incurvis ; areolis junioribus 
albo-tomentosis setas parcas brevissimas pallidas et plerisque aculeos 1-3 rectos rigidos stepe basi compressos tortosve 
obscuros gerentibus, infimis inermibus; floribus flavis miuoribus; ovario obovato pulvillos perpaucos fusco-villosos ge- 
rente; sepalis extenoribus ovato-lanceolatis,interioribus obovatis cuspidatis; petalis sub-5 obovatis spatulatis obtusis; 
stylo stamina aequante, stigmatibus 4-5 erectis; seminibus paucissimis anguste obtuseque marginatis in pulpa viscosa 
baccae parva? rubra? saepe floris rudimentis coronata? nidulantibus. 
Barren sandy places along the coast of Georgia and Florida. Joints 1-3 inches long, obovate tumid, or narrower 
