172 



THE CACtACEAE. 



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188. Opuntia velutina Weber in Gosselin, Bull. Mus. Hist. Nat. Pans lo: 389. 1904. 



0/?M/i//a ne/5onn Rose, Smiths. Misc. Coll. 50: 516. 1908. 



Stems I to 4 meters high; joints flattened, oblong to pear-shaped in outline, 15 to 20 cm. long 

 by 10 to 15 cm. broad near the top, pubescent, pale yellowish green in herbarium specimens; areoles 

 2 to 3 cm. apart; spines 2 to 6, yellow, becoming wliite in age, very unequal, the longer ones 3 to 4 

 cm. long; bristles many, yellow, becoming brownish; flowers rather small; petals yellow, i to 3 cm. 

 long; ovary pubescent, bearing many yellowish brown bristles; filaments red; stigma-lobes pale green; 

 fruit "dark red." ^- ^ ^ 



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Type locality: In Guerrero, Mexico. 

 Distribution: Southern Mexico. 



Plate XXXII, figure 3, represents a flowering joint of a plant collected at Tehuacan, 

 Mexico, by Dr. MacDougal and Dr. Rose in 1906, 



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189. Opuntia wilcoxii sp. nov. 



A tall, bushy plant, i to 2 meters high, very much branched; joints oblong, thinnish, large, 2 cm. 

 long, dark green, more or less purplish about the large areoles, finely puberulent ; glochids numerous, 

 long, yellow; spines i to 3, one very long (5 to 6 cm. long), porrect, white or somewhat yellowish; 

 flower, including ovary, 6 cm. long, yellow; petals oblong, mucronate; ovary bearing few large 

 areoles, these filled with brown wool and yellow glochids; filaments short; style thick, 2 cm. long, 

 with 10 stigma-lobes; fruit pubescent, 4 cm, long. 



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Very common on the hills in the coastal plain of west- 

 ern Mexico from southern Sonora to southern Sinaloa, 

 Mexico, where it was frequently collected by Rose, 

 Standley, and Russell in 1910; their No. 13546, with 



flower, from 

 the species. 



:e, Sinaloa, is selected as the type of 

 named for Dr. Glover B. Wilcox, who 



first sent in living specimens in 1909. 



specimen 





To this series belong two plants which we have not 

 been able to identify but are here briefly characterized : 



The first, a very pecuHar species, collected by Rose, 



Standley, 



March 14, 1910 (No. 12853), on 

 the dry hills near Alamos, Sonora, Mexico, is unUke any of 

 the described species. It is living both in Washington 

 and New York, but it has not done well in cultivation. 



may 



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short puberulence, nearly or quite spineless; glochids yellowish 



or greenish, numerous; young areoles brown in the center I'lo. 211.— Opimtia wilcoxii. X0.4. 



white- woolly in the margin; flowers and fruit not known. 



Dr. H. H 



It comes from the region of O. velutina, but we do not know its flowers. 



Mexico 



as follows: 



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^ Joints oblong, i8 cm. long, but cultivated specimens smaller, usually obovate, dark green; 

 spines few short, at first white; young areoles large, bordered with white wool, bearing the 

 and glochids from the center. 



spines 



Living specimens 



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TOMENTOSAE 



^ Tall, erect, pubescent or puberulent species, w 

 white. We know three species, natives of Mexico 



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