MALACOCARPUS. 205 



neither flowers nor fruit. We have taken it up in Malacocarpus since its relation- 

 ship appears nearer to species of this genus than to those of other described 

 genera. 



The name Echinocactus leninghausii cristatus is given by Schelle (Handb. Kakteenk. 

 178. 1907). 



Illustrations: Cact. Journ. 2: 4, as Pilocereus leninghausii; Schelle, Handb. Kakteenk. 

 178. f. 1 10; Mollers Deutsche Gart.Zeit. 25: 474. f. 6, No. 5; 27; Haage and Schmidt, Haupt- 

 Verz. 1919: 169; 1920: 127. f. 10779; De Laet, Cat. Gen. f. 7, as Echinocactus leninghausii. 



28. Malacocarpus graessneri (Schumann). 



Echinocactus graessneri Schumann, Monatsschr. Kakteenk. 13: 130. 1903. 



Stems simple, depressed, 5 to 6 em. high. 9 to 10 cm. in diameter, somewhat umbilicate at 

 apex; ribs very numerous (more than 6o), low, usually arranged in spirals, tuberculate; areoles 

 bearing numerous bright yellow spines, 2 em. long, the 3 to 6 central spines stouter and darker 

 yellow; flowers small, narrow, from near the center of the plant. 



Type locality: State of Rio Grande do Sul, Brazil. 



Distribution: Southern Brazil. 



This species must be a near relative of M. haselbergii, but with more ribs and slightly 

 different spines and flowers. Both species are referred to this genus only tentatively. 

 They very much resemble Rebutia fiebrigii in their form, ribs, and spines. Echinocactus 

 graessneri is offered in the trade catalogues of Europe, but we know it only from descrip- 

 tions and illustrations and from some small plants sent us by Haage and Schmidt. 



Illustrations: Monatsschr. Kakteenk. 23: 3; Gartenwelt 15: 536; Mollers Deutsche 

 Gart. Zeit. 25: 474. f. 6, No. 20; 489. f. 23, as Echinocactus graessneri. 



29. Malacocarpus escayachensis (Vaupel). 



Echinocactus escayachensis Vaupel, Monatsschr. Kakteenk. 26: 125. 1916. 



Globose, 12 cm. in diameter, very woolly at apex; ribs about 15; areoles approximate, short - 

 tomentose; spines about 20, unequal, some curved, others straight; flower 2.5 cm. long. 



Type locality: Escayache near Tarija, Bolivia. 

 Distribution: Southern Bolivia. 



Malacocarpus sp. 



Simple, or in clusters, short-cylindric, 1 dm. high; ribs about 15, low, broad, somewhat tuber- 

 cled; radial spines 10 to 12, acicular, ascending, 2 to 3 cm. long, brownish, darker toward the tip; 

 central spine usually solitary and hooked, a little stouter than the radials; flowers dull red, small, 

 extending only a short distance beyond the spines. 



Collected by Juan Sohrens in Tacna, Chile, altitude 3,000 meters, in 191 1. Dr. Rose 

 obtained a few clusters of spines from Mr. Sohrens's specimen in 1914. Mr. Sohrens has a 

 photograph of it also. 



The above species does not agree with any of the known species of South America. 

 It is the only one of the Echinocactus relationship on the Pacific side of South America which 

 has hooked spines. Mr. Sohrens believed it was a new species of Echinocactus. 



PUBLISHED OR RECORDED SPECIES, PROBABLY REFERABLE TO THIS GENUS. 



Echinocactus elachisanthus Weber, Bull. Mus. Hist. Nat. Paris 10: 387. 1904. 



Stem cylindric, 25 cm. high, 12 cm. in diameter; ribs very numerous, 45 or more, spiraled, divided 

 into tubercles; radial spines 12 to 15, setaceous, white, 5 to 12 mm. long; flowers very small, 12 to 

 15 mm. long; flower-tube very short; perianth-segments yellowish green; oVary green, small, spiny; 

 fruit greenish, 5 to 6 mm. in diameter; seeds small, dark brown. 



Type locality: Northeast of Maldonado, Uruguay. 

 Distribution: Uruguay. 



