FEROCACTUS. 



125 



Echinocactus piliferus Lemaire (Labouret, Monogr. Cact. 186. 1853) is usually referred 

 here, but was not described in the place 

 cited. 



Illustrations: Schumann, Gesamtb. 

 Kakteen f. 52; Monatsschr. Kakteenk. 22: 

 39, Mollers Deutsche Gart. Zeit. 25: 484. 

 f. 16; Schelle, Handb. Kakteenk. 147. f. 72; 

 Gartenwelt 7: 277, as Echinocactus pilosus; 

 Rev. Hort. II. 4: 1 ; Belg. Hort. 4: pi. 2, as 

 Echinocactus stainesii. 



Figure 128 is copied from the first 

 illustration above cited. 



Figs. 129 and 130. Flower and cluster of spines of 

 Ferocactus pringlei. X0.5. 



Fig. 131. Ferocactus 



Fig. 131 a. Ferocactus wislizeni. Natural size. 



2. Ferocactus pringlei (Coulter). 



Echinocactus pilosus pringlei Coulter, Contr. U. S. Nat. Herb. 3: 365. 1896. 

 Echinocactus pringlei Rose, Contr. U. S. Nat. Herb. 10: 127. 1906. 



Growing in clumps, becoming cylindric, sometimes 3 meters high and 3 to 4 dm. in diameter; 

 ribs usually 16 to 18, more or less compressed; areoles numerous, closely set or contiguous, the outer 

 margin with a row of white or straw-colored hairs, 2 to 4 cm. long; spines red, various, the three 

 lower ones slender, almost acicular, the innermost much stouter, somewhat flattened, angular, 

 curved or nearly straight; flowers red without, yellow within, 2.5 cm. long; scales on the ovary 

 numerous, orbicular, imbricated; inner perianth-segments oblanceolate, obtuse or apiculate; fruit 

 yellow, somewhat succulent, dehiscing by a basal pore, 3 to 4 cm. long, crowned by the persisting 

 perianth; seeds 1.5 mm. long, brownish, pitted, with a small basal hilum. 



