36 
species. The mature spine is very slender, red or brown, more 
or less banded. It consists of a very close spiral. 
Since describing this species from the specimens collected by 
the writer on Cape Sable, a specimen collected on Boot Key, 
Florida, in April, 1909, by Dr. N. L. Britton, has been found in 
the herbarium of the New York Botanical Garden, where it was 
associated with another plant. In July, 1918, Dr. J. N. Rose 
discovered the plant on Key West, whence he sent us joie and 
mature fruits. 
In addition to the herbarium specimens cited above, living 
specimens of the original collection are growing in the cactus 
garden at Buena Vista and in the conservatories of the New 
York Botanical Garden. As the plants grow at Buena Vista, 
they appear to last individually for at least several years, as up 
to the present there is no sign of the original plants breaking 
down. 
10. OpuntiA Drexwonpit Graham, The Botanist 5: pi. 246. 
1841 
Opuntia frustulenta Gibbes, Proc. Ell. Soc. Nat. Hist. I: 273. 
1850. 
Opuntia Pes-Corvt Le Conte; Chapm. FI. S. St. 145. 1860. 
Plant prostrate or diffusely sprawling, sometimes forming de- 
pressed mats, tuberous: joints ellipsoid, usually narrowly so, of 
slightly broadest above the middle or below it, very turgid, 3-12 
cm. long, light-green or pale-green, loosely attached to each 
other: leaves ovoid, 3-6 mm. long, green: areolae inconspicuous, 
the upper ones, at least, armed: spines very slender, solitary or 
2, 3, or 4 together, pink, reddish, or red, at maturity gray or even 
whitish, sometimes darker at the tip, nearly terete: flowers 
solitary or few on a joint: sepals lanceolate to ovate, acute oF 
acutish: corolla lemon- rellow, 5-6 cm. wide: petals rather few, 
the inner ones broadly cuneate to obovate, mucronate to emargi- 
nate at the apex: berries turbinate-obovoid, 2-3.5 cm. long. 
purple: seeds few, about 4 mm. in diameter. 
Pinewoods and sand-dunes, near the coast, North C arolina 
to Florida and Alabama. 
The history of Opuntia Drummondii, together with some notes 
