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17SER1902 



Sample copy free— please subscribe. 



The West American Scientist 



Vol. XII. No. /4. 



Jiilij, I go 2. 



Whole No. us 



CACTUS NOTES. 



The following- have been described by 

 Coulter under the generic name Cactus— 

 those which prove to be valid species we 

 will name as Mammillarias, but will not 

 yet make the transfer, as some are 

 known to be synonyms only of old spe- 

 cies : 

 CACTUS ALTERNATUS Coulter. 



"Subglobose, 10 cm. in diameter, simple: 

 tubercles long (15-20 mm) and spreading, 

 with woolly axils: radial spines 3, rigid 

 and| recurved, 5 mm long; central spines 

 3, very stout and much recurved, 20-30 mm 

 long, alternating with the radials; all 

 ashy colored and often twisted: flower 

 and fruit unknown: Type, in Herb. Coul- 

 ter. San Luis Potosi (Eschauzier of 

 1891)."— Coulter Cont U S Nat Hb 3:95 

 CACTUS ESCHAUZIERI Coulter. 



"Depressed-globose, 3 cm in diameter, 

 simple: tubercles broader at base, 6-8 mm 

 long, with naked axils: spines all pubes- 

 cent; radials 15-20, with dusky tips, thfc 

 lateral 10-12 mm long, the lower weakei, 

 shorter and curved, the upper shorter, 

 solitary central spine reddish, slender, 

 somewhat twisted, usually hooked up- 

 wards, 15-20 mm long: flowers red (?): 

 fruit reddish (?), ovate, about 10 mm 

 long; seeds reddish, oblique-obovate, 1.2 

 mm long, pitted, with subventral hiluni. 

 Type in Herb. Coulter. San Luis Potosi 

 (Eschauzier of 1891)."— Coulter Cont U S 



Nat Hb 3:104. 



CACTUS PRINGLEI Coulter. 



."Globose (?), 5 cm in diameter: tuber- 

 cles short-conical, about 6 mm long, with 

 very woolly axils: radial spines lS-20, se- 

 taceous-bristly and radiant, 5-8 mm long, 

 central spines 5-7 (usually 6), stout ana 

 horny, more or less recurved, spreading 

 20-25 mm long; all straw-colored, but the 

 centrals darker: flowers deep red (dark 

 er, even brownish outside), 8-10 mm long: 

 fruit unknown. Type, Pringle of 1891 la 

 Herb. Gray."— Coulter, Cont U S Nat Hb 

 3:109. 



CACTUS MACULATUS Coulter, 

 cm, simple: t 



"Obovate-cylindrical, 6 by 8 cm, some- 

 what oespitose: tubercles ovate, terete, 10 

 mm long, grooved to the base, with na- 

 ked axils: radial spines 10 or 11, straight 

 and spreading, rigid, blackish (becoming 

 ashy with age), black-tipped, 12 mm long; 

 central spine large, more or less spotted, 

 erect, 25-35 mm. long: flower 13 mm long, 

 pinkish: fruit unknown. Type in Herb. 

 Coulter, San Luis Potosi (Eschauzier of 

 1891)."— Coulter Cont U S Nat Hb 3:117. 

 CACTUS BRUNNEUS Coulter. 



"Obovate-cylindrical, 3 by 6 cm, simple, 

 tubercles ovate, grooved to the base, 5-b 

 mm long, with woolly axils: radial spines 

 11-15, spreading, rather rigid and brown- 

 ish (lighter with age), 8-10 mm long; cen- 

 tral spine much larger, 20 mm long, 

 hooked: flower and fruit unknown. Type 

 in Herb. Coulter. San Luis Potosi (Es- 

 chauzier of 1891)."— Coulter Cont U S Nat 

 Hb 3:117. 

 CACTUS DENSISPINUS Coulter. 



"Globose, 7.5 cm in diameter, simple: 

 tubercles short, with woolly axils: radiai 



