. Carnegie Institution of Washington publication. 234 THE CACTACEAE. Illustrations: Bliihende Kakteen 2: pi. 92, as Melocactus caesius; Mus. Bot. Leide 3: pi. 5, io, A; Versl. Kon. Akad. Wetensch. Amst. 6: opp. p. 192. pi. [4]; Gartenflora 46: pi. 1439; 52: 61. f. 8, as Melocactus humilis. Figure 245 shows the Surinam plant growing on a mass of rock on the nearly bare sum- mit of a hill; figure 246 is from a photograph of a plant obtained by Mr. Pittier near La Guayra in 1913; figure 247 was also obtained by Mr. Pittier at Barquisimeto in 1913; figure 244 shows a plant of Patos Island, Trinida
. Carnegie Institution of Washington publication. 234 THE CACTACEAE. Illustrations: Bliihende Kakteen 2: pi. 92, as Melocactus caesius; Mus. Bot. Leide 3: pi. 5, io, A; Versl. Kon. Akad. Wetensch. Amst. 6: opp. p. 192. pi. [4]; Gartenflora 46: pi. 1439; 52: 61. f. 8, as Melocactus humilis. Figure 245 shows the Surinam plant growing on a mass of rock on the nearly bare sum- mit of a hill; figure 246 is from a photograph of a plant obtained by Mr. Pittier near La Guayra in 1913; figure 247 was also obtained by Mr. Pittier at Barquisimeto in 1913; figure 244 shows a plant of Patos Island, Trinidad, taken by Professor Tracy E- Hazen in 1921. 14. Cactus townsendii nom. nov. Melocactus peruvianus Vaupel, Bot. Jahrb. Engler 50: Beibl. in: 2S. 1913. Not Cactusperuvianus Lin- naeus, 1753- Usually solitary, but sometimes several plants together forming a clump, nearly globular, 1 to dm. in diameter; ribs usually 12 or 13, prominent; areoles 1 to cm. apart, somewhat elliptic; spines usually 8 or 9, brown or brownish, long and spreading or recurved; central spine, if present, porrect, sometimes 4 cm. long; cephalium usually 6 to 8 cm. high, composed of reddish brown bristles and white wool; flowers pinkish, cm. long, persistent on the ovary; fruit red, narrowly clavate, 12 to 16 mm. long; seeds black, Fig. 245.—Cactus caesius Type locality: Chosiea, on the Lima and Oroya Railroad, central Peru. Distribution: Mountains of western central Peru, from above Lima to above Eten. Some years ago Dr. C. H. Tyler Townsend sent us a specimen of Cactus from Peru which we studied and described, but before our description could be printed Dr. F. Vaupel published his Melocactus peruvianas. His specific name can not be used under Cactus and we have, therefore, substituted the one which we first gave the plant. This is the most southern species of the genus Cactus on the west coast of America. Although described as a distinct species only in 1913, the presence of a so-
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