Stem simple, slender, dull green, about 3 dm. high and 9 cm. thick; ribs 12 to 14, low, slightly crenate; radial spines 7 or 8, straight, subulate, brown; central spine one, a little curved, much longer than the radials, 2 cm. long; flowers lateral, from near the middle of the plant, 15 to 17 cm. long; perianth-segments short, broad, acute, white; scales on ovary and tube small, very hairy in their axils.
This species which was found near Mendoza, Argentina, was first identified as Echinopsis salpingophora by Von Preinreich (Monatsschr. Kakteenk. 3: 163. 1893) and later as E. campylacantha by R. Meyer (Monatsschr. Kakteenk. 5: 27. 1895), both erroneously.
Illustrations: Monatsschr. Kakteenk. 3: 161, as E. salpingophora; Schumann, Gesamtb. Kakteen f. 46, as E. campylacantha.
Figure 88 is from a photograph contributed by Dr. Spegazzini.
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