192 



THE CACTACEAE. 



7. Malacocarpus apricus (Arechavaleta). 



Echinocactus apricus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 205. 1905. 



Cespitose, in clusters of 2 to 10, subglobose, 3 to 5 cm. in diameter, umbilicate at apex, densely 

 covered with interlocking spines ; ribs 1 5 to 20, somewhat curved, more or less tuberculate ; areoles 

 orbicular, 3 to 4 mm. apart, tomentose when young, becoming naked in age; radial spines 18 to 20, 

 grayish yellow, flexible; central spines several, 4 of the larger ones reddish at base; flowers yellow, 

 8 cm. long; flower-tube densely woolly and setose on the outside, very stout. 



Type locality: Punta de la Ballena, Uruguay. 

 Distribution: Uruguay. 



We know this plant only from description and illustration, from which the above 

 description has been drawn. 



Illustration: Anal. Mus. Nac. Montevideo 5: pi. 10, as Echinocactus apricus. 

 Figure 204 is copied from the illustration above cited. 



KiG. 204. Malacocarpus apricus. 



8. Malacocarpus concinnus (Monville). 



Fig. 205. Malacocarpus tabularis. 



Echinocactus concinnus Monville, Hort. Univ. 1: 222. 1839. 

 Echinocactus joadii Hooker in Curtis's Bot. Mag. 112: pi. 6867. 1886. 

 Echinocactus concinnus joadii Arechavaleta, Anal. Mus. Nac. Montevideo 5: 204. 



190s. 



Simple, globular or somewhat depressed, 5 to 7.5 cm. in diameter; ribs about 16 to 20, somewhat 

 tuberculate, light green; young areoles white-felted; spines 10 to 12, spreading, setaceous; radial 

 spines 5 to 7 mm. long; central spines 1 to 4, one much longer, spreading or turned downward; 

 flowers large, 7 cm. long; outer perianth-segments narrow, acute, reddish; inner perianth-segments 

 oblong, yellow, except the reddish tips, acute; stigma-lobes bright red; scales on the ovary hairy in 

 their axils; perianth-tube slender. 



Type locality: Not definitely cited. 



Distribution: Southern Brazil and Uruguay. 



We know this species only from description and illustrations. 



