212 



THE CACTACEAE. 



numerous, conspicuous on account of the densely crowded long bristles, especially on the older 

 joints, the marginal ones, at least, armed; spines very slender, solitary or 2 together, reddish or 

 red, at maturity gray, mostly 2 to 6 cm. long, nearly terete, scarcely spirally twisted; flowers sev- 

 eral on a joint; sepals lanceolate, acute or slightly acuminate; buds sharply pointed; corolla bright 

 yellow, 5 to 8 cm. wide; petals obovate, cuneate, notched, and prominently apiculate, 3 cm. long, 

 scarcely erose; stigma-lobes cream-color; berries obovoid, 2 to 3 cm. long, more or less flushed with 

 reddish purple, many-seeded; seeds about 4 mm. in diameter. 



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■^ ' " '-^^'V'^-'^iK'Tf'- ■ -^^. ^'^v^ v^>.^**^/■ 



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Fig. 274. — Opuntia argentina. 



Type l0C( 



Distribut 



Fig. 275. — Opuntia chaffeyi. Photograph 

 by Senor Don Teodoro Chairez. 



Inland sand-dunes (scrub), peninsular Florida. 



Small 



more 



He 



most conspicuous native prickly pear of Florida, always viciously armed 



acteristically unjointed trunk. 



Illustration: J 



many sle 

 pi. 224. 



