41 * 2 ^/ 
O. fusiformis, E. & B. 1. c.: subprostrata ; radicibus elongato-fusi- 
formibus ; articulis orbiculatis ; pulvillis setas elongatas yirescenti- 
fusees gerentibus, plerisque yel solum superioribus armatis; aculeis 
2-3 gracilibus albidis deflexis seu patentibus; floribus minoribus ; , 
stigmatibus 8; bacca ovata ; seminibus majusculis subregularibus. 
Kansas and Nebraska, in the regions of the Cross-Timbers, from the 
Canadian to the Big Bend of the Missouri. — Boots elongated tubers 
1 inch in diameter; joints about 3-4 inches long; spines an inch 
or a little more in length, slenderer and paler than in O. Rafinesquii. 
Flowers 2 - 2| inches in diameter. Seed 2 j lines wide. This plant 
has been distributed by me under the name of Opuntia bulbosa. 
17. O. fusco-atra, E. i n diffusa; articulis orbiculato- 
obovatis tuberculatis; pulvillis subremotis magnis griseo-tomentosis, 
inferioribus solum inermibus; setis numerosis robustis longiusculis 
fqscis; aculeis subsingulis robustis fusco-atris suberectis, altero bre- 
viore deflexo ssepe adjecto; floris flavi ovario conico pulvillos 12-18 
fulvo-villosos et fusco-setosos gerente ; stigmatibus 5. 
Sterile places in prairies, west of Houston, Texas : fl. May. — The 
stout brown, or above almost black spines, and the thick bunches of 
unusually stout brown bristles on the small joints, give this plant a 
very distinct appearance. Joints 2J-3 inches long; pulviiii 6-9 
lines apart; bristles 2-3 lines long; spines 1-1J inches long, the 
lower one, when present, about half as long, but hardly less stout. 
Flower nearly 3 inches in diameter ; ovary an inch long, rather slen¬ 
der, its pulviiii covered with long grayish-brown wool, and the upper 
ones with a few bright-brown bristles. 
18. O. vulgaris, Mill.: diffusa, prostrata ; radice fibrosa; articulis 
obovatis seu suborbiculatis crassis lsete seu pallide viridibus plerumque 
inermibus ; foliis ovatis cuspidatis fere adpressis ; pulvillis subremo¬ 
tis parvis subimmersis setas paucas abbreyiatas virescenti-stramineas 
gerentibus ; aculeis rarissimis singulis robustis variegatis suberectis; 
alabastro subgloboso obtuso; ovario olavato pulvillis sub-10 stipato ; 
petalis sub-8 ; stigmatibus 5 ; bacca obovata clavata; seminibus regu- 
laribus crassis crasse marginatis. 
From the southeastern coast of Massachusetts to Georgia and Flor¬ 
ida ; apparently only in the low countries east and southeast of the 
Alleghany Mountains, generally not far from the sea-coast: fl. May and 
June. —-Joints 2-4 inches long and 2- 2J- in diameter, rather thick 
and fleshy. Leaves 2 -2J lines long, generally appressed, only in 
6 
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BOTAN ICAL 
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