190 



THE CACTACEAE. 



3. Malacocarpus grossei (Schumann). 



Echinocactus grossei Schumann, Monatsschr. Kakteenk. 9: 44. 1899. 



Globose to depressed or sometimes cylindric, sometimes up to 1.7 meters high; ribs usually 16, 

 acute, somewhat crenate; areoles small, circular; spines 3 to 7, spreading, acicular, curved, white, the 

 longer ones 4 cm. long; flower large, funnelform, citron-yellow, 4 cm. long, when fully expanded 

 broader than long; perianth-segments oblanceolate to spatulate, obtuse, serrate above; stamens 

 numerous, short ; style slender, longer than the stamens ; stigma-lobes 1 2 to 1 7, linear, white, recurved ; 

 scales on the ovary numerous, linear, purplish, with wool and bristles in their axils; fruit short- 

 oblong, 2.5 cm. long, 2 cm. in diameter; seeds black, 2 mm. long. 



Fig. 200. Malacocarpus grossei. 



Fig. 201. M. napinus. 



Type locality: Paraguay. 



Distribution: Paraguay, between Carepegua and Acaay. 



The species is known to us only from illustrations and description ; it and the pre- 

 ceding one are much the largest of the genus, as known to us. The Bliihende Kakteen 

 shows the spines as yellow, but they were originally described as white. 



Illustrations: Bliihende Kakteen 2: pi. 89; Mollers Deutsche Gart. Zeit. 25: 474. f. 6, 

 No. 18; Monatsschr. Kakteenk. 9: 44; Schumann, Gesamtb. Kakteen Nachtr. f. 19, as 

 Echinocactus grossei. 



Figure 200 is copied from the first illustration cited above. 



4. Malacocarpus nigrispinus (Schumann). 



Echinocactus nigrispinus Schumann, Monatsschr. Kakteenk. 9: 45. 1899. 



Cespitose, globose to short-columnar, green; ribs 20 or more, acute; spines 9 or 10, somewhat 

 curved, slender, reddish when young, afterward silvery; flowers yellow, funnelform; scales of the 

 ovary filled with hairs and bristles. 



Type locality: Between Carepegua and Acaay, Paraguay. 

 Distribution: Paraguay. 



We have had small plants of this species growing which do not differ very much, if any, 

 from Malacocarpus schumannianus. 



