200 
THE CACTACEAE. 
although we are aware that Schumann refers it first to Malacocarpus polyacanthus and 
afterwards to Echinocactus erinaceus. 
Illustrations: Link and Otto, Icon. PI. Rar. pi. 40, as Echinocactus langsdorfii; Nov. 
Act. Nat. Cur. 16: pi. 13, as Cactus langsdorfii. 
Figure 217 is copied from the second illustration cited above. 
19. Malacocarpus mammulosus (Lemaire). 
Echinocactus mammulosus Lemaire, Cact. Aliq. Nov. 40. 1S38. 
Echinocactus hypocrateriformis Otto and Dietrich, Allg. Gartenz. 6: 169. 1838. 
Echinocactus submammulosus Lemaire, Cact. Gen. Nov. Sp. 20. 1839. 
Echinocactus pampeanus Spegazzini, Contr. FI. Vent. 27. 1896. 
Echinocactus acuatus arechavaletai Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 494. 1905. 
Echinocactus mammulosus submammulosus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 496. 1905. 
Echinocactus mammulosus pampeanus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 496. 1905. 
Echinocactus mammulosus hircinus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 496. 1905. 
Echinocactus mammulosus typicus Spegazzini, Anal. Mus. Nac. Buenos Aires III. 4: 496. 1905. 
Echinocactus floricomus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 183. 1905. 
Echinocactus pampeanus charruanus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 193. 1905. 
Echinocactus pampeanus rubellianus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 194. 1905. 
Echinocactus pampeanus subplanus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 194. 1905. 
Echinocactus arechavaletai Schumann in Arechavaleta, Anal. Mus. Nac. Montevideo 5: 208. 1905. Not 
Spegazzini, Jan. 1905. 
Simple, nearly globose, about 8 cm. high, light shining green; ribs 18 to 25, strongly tuberculate, 
almost covered by the numerous interlocking spines; radial spines 20 to 30, 5 cm. long; central spines 
2 to 4, about 2 cm. long; flowers yellow, 3.5 to 4 cm. long; scales of the ovary woolly and setose in 
their axils. 
Type locality: Not cited. 
Distribution: Brazil, Uruguay, and Argentina. 
Labouret (Monogr. Cact. 228, 229. 1853) mentioned three varieties of this species as 
follows: spinosior Haage, cristatus Monville, and minor Monville. 
Echinocactus hypocrateriformis spinosior Haage probably should be referred here. 
Spegazzini (Anal. Mus. Nac. Buenos Aires III. 4: 496. 1905) referred the species pam¬ 
peanus and submammulosus as varieties of this species. 
Illustrations: Schelle, Handb. Kakteenk. 181. f. x 15; Knippel, Kakteen pi. 9; Cact. 
Journ. 2: 102; Anal. Mus. Nac. Montevideo 5: pi. 3, as Echinocactus mammulosus; Martius, 
FI. Bras. 4": pi. 51, f. 2, as Echinocactus hypocrateriformis; Anal. Mus. Nac. Montevideo 5: 
