Echinopsis pygmaea R. E. Fries, Nov. Act. Soc. Sci. Upsal. IV. 1: 120. 1905.
Simple, ovoid to short-cylindric, 1 to 3 cm. long, 1.2 to 2 cm. in diameter, or sometimes branched with 2 to many short joints from a much thickened root; tubercles small, more or less arranged into 8 to 12 spiraled rows; areoles narrow, somewhat lanate; spines all radial, 9 to 11, short, appressed, 2 to 3 mm. long, acicular, somewhat swollen at base; flowers from the lower part of the plant, somewhat curved at base, becoming nearly erect, 18 to 25 mm. long, rose-purple; scales on ovary and flower-tube small, hairy in their axils; fruit globular, 6 mm. in diameter.
Type locality: Yavi, province of Jujuy, Argentina.
Distribution: Bolivia and northwestern Argentina.
We have studied living plants collected by Dr. Rose at Oruro, Bolivia.
Illustrations: Nov. Act. Soc. Sci. Upsal. IV. 11: pl. 8, f. 1 to 3, as Echinopsis pygmaea.
Figure 60 is copied from the illustration above cited.
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