ILLUSTRATED STUDIES IN THE GENUS OPUNTIA— III. 171 



by 24 cm., slightly elevated at areoles when young; areoles at first 

 white, almost cottony, turning gray and finally black, small, 2 or 3 

 mm. in diameter; leaves long, prominent, circular in section, subu- 

 late, cuspidate, soon recurved, 12 to 15 mm. in length; spicules yellow, 

 but never prominent except on fruit where there are only a few in 

 upper areoles, all but absent from joints; spines entirely absent; 

 flowers deep yellow, changing to orange, reddish when closed, some 

 of the outer perianth segments tinged with dull greenish red in bud, 

 about 6 cm. in diameter when fully open, filaments and style white, 

 stigma very light greenish yellow, 7 parted; fruit pyriform, deep 

 reddish purple. 



The species is known only in cultivation and only from 

 southern Texas. It is rather common in gardens at Corpus 

 Christi and Brownsville, especially. It was received first 

 through Mr. James Anderson, Jr., and Professor J. Cos- 

 well Ellis, from Corpus Christi, and afterwards collected 

 there by myself. It is only remotely related to any other 

 snineless onuntia described. It is about as smooth as any 



much more hardy than the 0. fi 



cold weather at Corpu: 



Christi 



com 



upon a cultivated plant. The type is a specimen 



from 



m 



at Corpus Christi, Texas, on 1907.— Plate 25. 



Opuntia Wootonii sp. nov. 



A very open spreading, ascending species, about 6 dm. high (3 years 

 old) and H to 2 meters in spread of branch, the main limbs horizontal, 

 ascending or resting on edge on ground, the secondary ones erect from 

 them; joints widest near the middle, pointed at either end, about 18 

 by 32 cm., glaucous, light blue-green becoming more yellow in age; 

 areoles broadly oval, about 5 to 7 mm. in length and 3£ to 4 cm. 

 apart, increasing in size with age, at first tawny and then gray, leaves 

 large, slightly flattened, erect, but recurved at tip in age, subulate, 

 cuspidate-pointed, 15 to 20 mm. long; spicules long, formidable, in an 

 unequal, hemispherical tuft in upper portion of areole, often 1$ cm. 

 long above and on edges of joints, increasing with age and often fill- 



very 



twisted 



and shortest about 1 cm. , but the long ones greatly predominating and 

 more commonly about 7 cm. , 4 to 6 on last year's joints and increasing 



