ECHINOPSIS. 75 



2: 133. 1920) from which it is very distinct although the flowers resemble very much 

 those of a Trichocereus. 



27. Echinopsis mamillosa Giirke, Monatsschr. Kakteenk. 17: 128. 1907. 



Stem simple, depressed-globose, 6 cm. high, 8 cm. in diameter, shining dark green, tubercled 

 and unarmed at the apex; ribs 17, divided by deep furrows into acute tubercles ; areoles 8 to 12mm. 

 apart, irregularly orbicular; radial spines 8 to 10, subulate, 5 to 10 mm. long; central spines 1 to 4, 

 somewhat stronger and longer than the radials, all yellowish, brown at the apex; flowers 15 to 

 18 cm. long, white, rose-colored towards the apex of the segments; flower-tube funnelform, some- 

 what curved, green, bearing small ovate scales, these hairy in their axils ; outer perianth-segments 

 linear, brownish, spreading; inner perianth- segments oblong, apiculate; stigma-lobes yellow, 

 linear, about 10. 



Type locality: Bolivia. 



Distribution: Bolivia. 



We have not seen this plant, but have a colored sketch of the type made by Mrs. 

 Giirke, July 16, 1907. Through some error, the Kew Bulletin (Kew Bull. Misc. Inf. 

 App. 87. 1908) describes the flower as only three-fourths of an inch in length. 



Although this species is formally described on page 135 of the Monatsschrift fur 

 Kakteenkunde, it is technically described a month earlier (p. 128). In fact, the flowers 

 are much better and more fully characterized here than in the formal description. 



Illustration: Monatsschr. Kakteenk. 31: 153. 



28. Echinopsis formosa (Pfeiffer) Jacobi in Salm-Dyck, Cact. Hort. Dyck. 1849. 39. 1850. 



Echinocactus formosus Pfeiffer, Enum. Cact. 50. 1837. 



Echinopsis formosa spinosior Salm-Dyck in Labouret, Monogr. Cact. 303. 1853. 

 Echinopsis formosa laevior Monville in Labouret, Monogr. Cact. 303. 1853. 

 Echinopsis formosa rubrispina Monville in Labouret, Monogr. Cact. 303. 1853. 



Simple, oblong, 3 dm. high, pale green; ribs 15 to 35, vertical; areoles 8 to 10 mm. apart; spines 

 acicular, reddish, 2 to 4 cm. long; radial spines 8 to 16, yellowish; central spines 2 to 4, brown; 

 flowers golden-yellow, 8 cm. long, 8 cm. broad. 



Type locality: Mendoza, Argentina. 



Distribution: Western Argentina. 



We know the species only from descriptions and from some very poor illustrations. 

 H. J. Elwes (Gard. Chron. III. 70: 199. 1921) states that there is a specimen in the Darrah 

 Collection at Manchester that is 2 feet high. It has added but one inch to its height 

 in the last 10 years. The specimen has been in England for 60 years. 



Cereus gilliesii Weber (Diet. Hort. Bois 471. 1896) was given as a synonym of Echinop- 

 sis formosa. 



Melocactus gilliesii (Otto, Allg. Gartenz. 1: 364. 1833) and Echinocactus gilliesii and 

 Echinopsis formosa gilliesii (Salm-Dyck, Cact. Hort. Dyck. 1844. 22. 1845) are usually 

 referred to Echinopsis formosa. 



Echinocactus formosus crassispinus Monville (Labouret, Monogr. Cact. 303. 1853) 

 was published as a synonym of Echinopsis formosa spinosior and therefore doubtless 

 belongs here. 



Echinopsis formosa albispina Weber is mentioned by Schelle (Handb. Kakteenk. 118. 

 1907). 



Illustrations: Schelle, Handb. Kakteenk. f. 51; Monatsschr. Kakteenk. 4: 187. f. 1; 

 Knippel, Kakteen pi. 16. 



UNCERTAIN OR UNDESCRIBED SPECIES. 

 Echinopsis miecklevi R. Meyer, Monatsschr. Kakteenk. 28: 122. 1918. 



Simple, ellipsoid to short-columnar, pale grayish green, 16 cm. high, 10 cm. in diameter; 

 ribs 14, high, somewhat sinuous; radial spines usually 10, but sometimes 9 or 11, straight, 2.5 cm. 

 long; central spine solitary, stouter than the radials, pale brown, sometimes whitish at tips, 5 cm. 

 long; flowers and fruit unknown. 



