Selaginella producta Baker in Journ. Bot. 21 
(1888) 243. 
Selaginella producta was collected several times by 
Spruce along the entire Rio Negro. Schultes & Lépez 
9219 is the sixth collection of this curious caatinga 
species. 
Brazi_t: Estado do Amazonas, Rio Negro basin, Rio Xié, Cachoeira 
Cumati. December 3, 1947, Richard Evans Schultes & Francisco Lopes 
9219. 
Selaginella revoluta Baker in Journ. Bot. 21 
(1883) 14. 
Selaginella revoluta has been known from the upper- 
most parts of the Rio Negro Valley in Brazil and from 
the distant Rio Ucayali in Peru (Alston |.¢. 315). 
Brazit: Estado do Amazonas, Rio Negro, Jucabi near mouth of Rio 
Curicuriari. April 23, 1948, Richard Evans Schultes & Francisco Lopez 
9839. 
Selaginella stellata Spring in Martius F]. Bras. 1, 
pt. 2 (1840) 129. 
Selaginella stellata was described from material from 
the lower course of the Amazon. These recent collections 
extend our knowledge of the distribution of this species. 
Brazit: Estado do Amazonas, Rio Negro basin, Rio Xié, near 
mouth. December 2, 1947, Richard Evans Schultes & Francisco Lopez 
9202.—Estado do Amazonas, Rio Negro basin, Rio Dimiti. “On 
mountain side.’’ May 12-19, 1948, Richard Evans Schultes & Fran- 
cisco Lépez 9950. 
Selaginella subarborescens Hooker in Sec. Cent. 
Ferns (1861) t. 84. 
This large species of Selaginella has been known only 
from the type collection which was made by Spruce on 
the Rio Uaupés in Brazil. Schultes & Pires 9056 is the 
second collection and is from the type region. Since the 
type was collected on the Colombian- Brazilian boundary, 
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