174 



THE CACTACKAE 



Plate XXXIII, figure i, represents a fruiting joint of a plant raised from seeds received 

 by the United States Department of Agriculture. Figure 212 is from a photograph of a 

 plant near St. Georges, Bermuda, taken by Stewardson Brown in 191 2. 



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191. Opuntia tomentella Berger, Monatsschr. Kakteenk. 22: 147. 1912. 



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Bushy; joints obovate to oblong, 20 to 30 cm. long, 9 to 15 cm. broad, light green, somewhat 

 shining, finely puberulent; areoles about 3 cm. apart, small; spines i or 2, acicular, white, short 

 (7 to 10 mm. long), porrect, sometimes wanting; glochids few; flowers numerous, 5 to 6 cm. long; 

 petals obovate, reddish yellow; filaments yellowish green; style rose-colored; stigma-lobes white; 

 ovary tomehtose, armed with numerous black glochids; fruit oblong, red, sour. 



Type locality: In Guatemala. 



Distribution: Guatemala. 



This species was distributed by the late F. Kichlam, who sent 

 plants both to Washington and to I^a Mortola, those sent to I^a 

 Mortola being used by Mr. Berger for his description. The species 

 is perhaps near the common Mexican species O. tomentosa, but 

 does not grow so tall, and the tomentum'is not so dense nor so 



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soft. 



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Figure 213 represents a joint of a plant collected in Guatemala 



by F. Eichlam in 1909. 



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192. Opuntia guilanchi GrifFiths, Rep. Mo. Bot. Gard. 19: 265. 1908. 



Becoming 1.5 to 2 meters high, often with a distinct trunk 1.5 to 

 2.5 cm. in diameter; joints broadly obovate, 14 to 16 cm. wide, 20 to 

 24 cm. long, minutely pubescent; spines at first white, shghtly flat- 

 tened, the longest 2 cm. long; glochids light yellow; fruit subglobose, 4 

 cm. in diameter, pubescent, variously colored, aromatic. 



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Type locality: Near the city of Zacatecas, Mexico 



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Distribution 



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Mexico. 



LEUCOTRICHAE 



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This series is restricted to a single species. Schumann grouped as 

 Chaetophorae, 0. leucotricha with 0. ursina, the latter a species with simi- 

 lar long bristles on the stem but otherwise very different, it being dry- 

 fruited. Opuntia leucotricha is characterized by its long, weak, hair- 

 like or bristle-like spines on many of the joints, especially the stem and 

 very old joints. The fruit qf this plant is very different from that of 



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Fig. 213 



Optxntia 

 X0.4. 



tomentella 



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mature 



193. 



leucotricha De Candolle. Mem. Mus 



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Salm-Dyck in Pfeiffer, Enum. Cact. 164. 1837. 

 fulvispina Weber in Schumann. OeRamth TCaVt. 



119 



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1828. 



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1903. 



Often 3 to 5 meters high, with a large top; trunk as well as the older joints covered with long 

 white bristles; joints oblong to orbicular, i to 2 cm. long, pubescent; areoles closely set, the upper 

 part filled with yellow glochids, the lower part at first with only i to 3 weak white spines; flowers, 

 including ovary, 4 to 5 cm. long ; petals yellow, broad ; ovary with numerous areoles, the upper ones 

 bearing long, bnstly glochids (i cm. long); style red; stigma-lobes green; fruit variable, 4 to 6 cm. 

 long, white or red, the rind not easily coming off from the pulp, aromatic edible 





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Type locality: In Mexico 



Distribution: 



Mexico 



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Opuntia erythrocentron I^emaire 

 synonym of O. fulvispina. 



Handb. Cact. 492. 1846) was given as a 



Opuntia Icucosticta Wendland (Pfeiffer, Enum. Cact. 16; 

 Opuntia leucacantha Link and Otto (Salm-Dvck Hort 



first in 1834 



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name 



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