222 



TH^ CACTAC^Ai;. 



161 a. Opuntia zebrina vSmall, Journ. N. Y. Bot. Gard. 20: 35. 1919. (See page 155, ante.) 



Plant erect, more or less branched throughout, fully i meter tall or less, the roots fibrous, 

 joints oval or obovate, thickish, mostly i to 2 dm. long, deep green, sometimes obscurely glau- 

 cous; leaves ovoid, 2 to 3 mm. long, bright green; areloes scattered, some of them, usually the lower 

 ones, unarmed, the upper ones irregularly armed; spines slender, solitary or 2, 3, or 4, together, 

 red-brown, finely banded, nearly terete, closely spirally twisted; flowers few on a joint, or soli- 

 tary; sepals deltoid to deltoid-reniform or nearly reniform; corolla yellow, rotate, -6 to 7 cm. wide; 

 petals rather numerous, the inner ones broadly obovate, undulate, minutely mucronate or notched 



many, 6 to 7 mm. in diameter. 



base 



^4»-* ^ t ^ '.^ 



Fig. 295. — Opuntia zebrina. 



Middle 



Di 



Key 



Coastal sand-dunes, Cape Sable, Florida, and the lower 



909 



most 



Key 



from 



The spe- 



the United States. 



member 



species were observed grc 

 Illustration: Journ. N. Y 

 Figure 20'; is from a nhot 



resembles O. dillenii, and on Key West 



FtG. 296. — Fruit of 

 O. zebrina. X0.5. 



Florida, in 191 8. 



Miami, Florida; figure 296 shows a fruit collected by Dr. Rose on Key West 



J 



r 



1919- (See p. 162, ante.) 



Plant erect, much branched, sometimes forming clumps 3 meters tall, with long fibrous roots- 

 joints elliptic, oval, obovate, or spatulate, thick, i to 3 dm. long, bright g^een; leavL ovoM 2 to .' 



T.r^:^\Z^'Zf:\'"''''\ ^TfP'-°-' °^" relativel/ larg? and prominent? apparently 

 unarmed spines stout 4 to 13 together, very short, mostly hidden in the bristles- at first nink 

 at maturity salmon-colored, slightly flattened; flowers solitary or 2 or 3 on a ioint sepals dehoid 

 to subreniform, acute or acutish; corolla salmon-colored, cup-like, or shorlcampanuate fto 3 tcm 

 wide ; petals rather few. thinner ones broadly obovate or orbicular-obovate undulate' scarcelv^f 

 at all. mucronate; berries obovoid, 4 to 6 cm. long, purple; seeds numerous' ""^'^^^^'' ''^'""^>^' '^ 





