. Carnegie Institution of Washington publication. 196 THE CACTACEAE. Echinocactus ottonis paraguayensis Heese, Gartenwelt 9: 266. 1905. Echinocactus ottonis uruguayus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 213. 1905. Echinocactus arechavaletai Spegazzini, Anal. Mus. Nae. Buenos Aires III. 4: 496. 1905. Echinocactus spegazzinii Gurke, Monatsschr. Kakteenk. 15: no. 1905. Echinocactus ottonis brasiliensis Haage jr., Monatsschr. Kakteenk. 24: 41. 1914. Simple or cespitose, globular or somewhat depressed, more or less glossy green, 5 to 6 cm. in diameter; ribs 10, broad and rounded below; areo
. Carnegie Institution of Washington publication. 196 THE CACTACEAE. Echinocactus ottonis paraguayensis Heese, Gartenwelt 9: 266. 1905. Echinocactus ottonis uruguayus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 213. 1905. Echinocactus arechavaletai Spegazzini, Anal. Mus. Nae. Buenos Aires III. 4: 496. 1905. Echinocactus spegazzinii Gurke, Monatsschr. Kakteenk. 15: no. 1905. Echinocactus ottonis brasiliensis Haage jr., Monatsschr. Kakteenk. 24: 41. 1914. Simple or cespitose, globular or somewhat depressed, more or less glossy green, 5 to 6 cm. in diameter; ribs 10, broad and rounded below; areoles few, usually distant, 1 em. apart or more, small, circular; spines acicular, brown, 1 cm. long or less; flowers from the uppermost areoles, one or more appearing at a time, 5 to 6 cm. long, bright yellow; perianth-segments linear-oblong, acute; sta- mens about half the length of the perianth-segments; style yellow; stigma-lobes red; axils of scales filled with long brown wool and brown bristles. Typelocality: Supposed to be Mexico, but the species was described from a garden plant. Distribution: Southern Brazil, Uruguay, and adjacent parts of Argentina. The varietal name, Echinocactus ottonis paraguayensis, is usually credited to .Schumann who used it in 1900 (Monatsschr. Kakteenk. 10: 179). The name Cereus ottonis appears in Pfeiffer's Enumeratio (47. 1837) as a syn- onym of Echinocactus ottonis, but it does not occur thus where Pfeiffer cites it (Nov. Act. Nat. Cur. 16: 316. 1828), but as Cactus (Cereus) ottonis. The following varieties are sometimes met with: E. ottonis brasiliensis (Monatsschr. Kak- teenk. 18: 48. 1908), pfeifferi Monville (Salm-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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