



ILLUSTRATED STUDIES IN THE GENUS OPUNTIA — III. 173 



ules with yellow tips, all Anally fading to a dull dirty gray or brown; 

 flowers yellow changing to orange, about 4 or 5 cm. in diameter when 

 fully opened, greenish within with filaments yellowish above and 

 greenish below, style white, stigma yellowish, small, 7 parted; fruit 

 small, pyriform, slightly to quite deep pitted above, reddish purple 

 without and greenish yellow within, rind quite succulent and pulp 

 small in amount having a slight aroma when first cut, covered with 

 small, sub-circular areoles not over 1 mm. in diameter and 5 or 6 mm. 

 apart. ■ 



The species is more closely related to 0. phaeacantha than 

 any other species, but differs decidedly in many character- 

 istics as indicated above. Well matured plants are quite 

 different in habit. Although always greenish yellow within, 

 the fruits differ decidedly in size. 



The description was drawn in the type locality and has 

 been amended by subsequent notes secured near Devil's 

 River, Texas. The type is No. 9411 D. G., collected near 

 Devil's River, Texas, July 20, 1908.— Plate 26, lower figure. 



Opuntia Sinclairii sp. nov. 



An erect or ascending, open branching species making a shrub 12 

 dm. ihigh and 1£ to 2 meters in diameter; joints broadly obovate and 

 broadly rounded above, commonly 20 by 22 cm., although often larger 

 and smaller, blue-green, mostly somewhat glaucous, especially when 

 young; areoles sub-circular to obovate, 5 to 6 mm. in length, at first 

 brown, becoming dirty black; leaves 6 to 8 mm. long, sub-circular in 

 section, subulate, cuspidate-pointed, mostly recurved; spicules reddish 

 brown, numerous, scattered, unequal, 5 to 6 mm. long, the tips often 

 fading to yellow and even dirty grayish; spines yellowish, bonelike to 

 chalky white with light brown bases, mostly 3 or 4, often 2 to 5, 

 erect, divergent, increasing with age to often about 8, the longest 4 

 to 4£ cm. long, flattened, usually not twisted, faintly when at all 

 annular; flowers yellow, fading to orange, filaments yellow, style 

 white, stigma bright green, 8 to 9 parted; fruit reddish purple through- 

 out; seed small. 



This species is rare in the type locality and is rather 

 closely related to Opuntia Lindheimeri, from which it dif- 

 fers in having reddish-brown spicules and spines colored at 

 base, these characters being constant and distinct. It has 

 been in cultivation with us now for the past 6 years and 

 usually produces flower and fruit in abundance the third 

 year from single joint cuttings. 



