ECHINOPSIS. 
71 
Illustrations: Bliihende Kakteen 2: pi. 100; Monatsschr. Kakteenk. 16: 27; Mollers 
Deutsche Gart. Zeit. 25: 475. f. 7, No. 10. 
Figure 90 is copied from the first illustration above cited. 
19. Echinopsis rhodotricha Schumann, Monatsschr. Kakteenk. 10 : 147. 1900. 
Echinopsis rhodotricha robusta R. Meyer, Monatsschr. Kakteenk. 24; 113. 1914. 
Cespitose, dull grayish green, with 8 to 10 erect or ascending cylindric stems, 3 to 8 dm. high, 
9 cm. in diameter, or sometimes simple in cultivation; ribs 8 to 13, rather low, a little sinuate; areoles 
15 to 25 mm. apart; radial spines 4 to 7, widely spreading, a little curved, yellowish with brown tips, 
2 cm. long; central spine one, 2.5 cm. long, shorter than the radials, or wanting, somewhat bent up¬ 
ward; flowers 15 cm. long; inner perianth-segments white, oblong, acute; stigma-lobes linear, n, 
green. 
Fig. 90 — Echinopsis fiebrigii. Fig. 91. —Echinopsis rhodotricha. 
Type locality: Arroyo La Cruz, near San Salvador, Rio Tagatiya-mi, Paraguay. 
Distribution: Paraguay and northeastern Argentina. 
Spegazzini states (Anal. Mus. Nac. Buenos Aires III. 4 : 488. 1905) that Schumann 
first named this species Echinopsis spegazzinii, but as such it has not been formally pub- 
fished. 
The variety Echinopsis rhodotricha argentiniensis R. Meyer (Monatsschr. Kakteenk. 21: 
188. 1911) seems to differ from the type in its shorter, darker stems with radial spines. 
It was introduced from Argentina and is now offered in the trade. 
The variety Echinopsis rhodotricha roseiflora Schumann (Bull. Herb. Boiss. II. 3: 251. 
1903) comes from near Concepcion, Paraguay, and is described as having pale rose-colored 
inner perianth-segments. 
The variety robusta is offered for sale by R. Grassner. 
The plant is known to us only from description and illustrations. 
