WILCOXIA. 



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Herbarium of the Museum of Paris, where it was examined 



It is 



same 



specimens 



Mexico 



The plant is remarkable among Cereeae in having puberulent stems. We include i 

 Wilcoxia, but are uninformed as to the characters of the roots, which are tuberous in 



other species. 



Figure 163 shows pieces of the stem, from an herbarium specimen collected by C 



Purpus at the type locality. 



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2. Wilcoxia 



12: 434 



1909 



Cereus tuberosus Poselger, Allg. Gartenz. 21: 135. 1853- Not Pfeiffer, 1837 

 Echinocereus poselgeri Lemaire, Cact. 57. 1868. 

 ^Echinocereus tuberosus Riimpler in Forster, Handb. Cact. 

 Cereus poselgeri Coulter, Contr. U. S. Nat. Herb. 3: 398. 



ed. 2. 783. 1885. 

 1896. 



Roots tuberous, black, several, near the surface of the ground; stems 60 cm. high or less, 6 to 

 10 mm. thick, with 8 to 10 inconspicuous ribs, the lower and older parts naked, spiny above, the 



almost 



ntermixed with 



linear, acuminate, about 2,5 cm. long, widely spreading or strongly recurved; style pale green; 

 stigma-lobes slender, green; seeds pitted or rugose, 8 mm. long. 



Type locality: Texas. 



Distribution: Southern Texas and Coahuila. 



This cactus does not grow well on its own roots in green- 

 house cultivation, but gradually loses its vitaHty; we have had 

 plants, however, to persist in cultivation for ten years. If 

 grafted on cuttings of Selenicereus pteranthus,_ very vigorous 

 plants can be developed, which will flower each year. It 



IS 



sometimes 



^^ f 



The flowers open in the afternoon, but close at night, 



from 



They 



have a pleasing odor. 



Illustrations: Monatsschr. Kakteenk. 13: 771 Knippel 

 Kakteen pi. 15; Bliihende Kakteen i: pi. 38; Schelle, Handb 

 Kakteenk. f. 53, as Echinocereus tuberosus; Engelmann, Cact 

 Mex. Bound, pi. 59, f. 12; Goebel, Pflanz. Schild. i: pi. 4. f- i 

 Blanc, Cacti 38. f. 348, 349, as C. tuberosus. 



Figure 1 64 is from a photograph of a flowering plant in the 

 collection of the New York Botanical Garden; figure 165 shows 

 the cluster of tuberous roots of a plant grown at Floral Park, New York, m 1890. 



* 



3. WUcoxia striata (Brandegee) Britton and Rose, Contr. U. S. Nat. Herb, i?: 434- 1909 



Fig. 165. 



Cluster of tuberous 

 W. poselgeri. Xo.6. 



Cereus striatus Brandegee, Zoe 2:19- 1891. 



"Weber ^ '^ "' ^ "'"' ""^"^ 



1895. 



Roots brownish, deep-seated ; stem vine-like, very slender usually with 9 i^fj^f^^^^;,^^^; %^ \ 

 spines about 9, 1.5 to 3 mm. long, acicular, weak, pressed, brownish the areolesr^^^^^^^ 

 flowers 10 to I2 cm. long, purple, the areoles bearing slender, ^nstle^tke pmes andjong wool, fruit 

 pyriform, 3 to 4 cm. long, scarlet, spiny, the spmes deciduous; seeds minutely pitted. 



: - f 



Typ 



Jose del Cabo, Lower 



4 



Distribution: Lower California and Sonora, Mexico. ;..,^pt^pn 



The natives call it pitayita, pitahayita, sacamatraca, ^^'^^^''""'l^^^t^^^^ 



'Tt-- j-rf.„_ r„_... .i,„ ^' .^.^;oc r.f fViP (Tonus n its much larger, funnelform flowers. 



This differs from 





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