Monographs Details: Strychnos javariensis Krukoff
Authority: Krukoff, Boris A. 1965. Supplementary notes on the American species of Strychnos VII. Mem. New York Bot. Gard. 12: 1-94.
Family:Loganiaceae
Description:Distribution and Ecology - Distribution: This species is known from the western part of the Amazon basin and its range probably is more or less similar to the range of S. Castel-naeana. In the State of Amazonas, Brazil it has been collected in the basins of the upper Rio Solimoes, of Rio Iça, of the lower Rio Javari and of the middle Rio Jurua. Found also in Colombia (Putumayo; Amazonas). Doubtless occurs in adjacent Peru.

Discussion:The species was described on the basis of sterile material and we suggested its affinity to S. diaboli (1: 280). Flowers were described later and it is satisfying that its position in the genus and its affinity to S. diaboli, which we suggested, have been fully confirmed (3: 64). Mature fruits and seeds were described by Ducke (31: 25, 56). They resemble somewhat those of S. Barnhartiana. Now that S. Froesii is known, I agree with Ducke (31: 36) that sterile Ducke s.n. (Aug. 8, 1941) collected near Manaos is best placed with S. Froesii rather than with S. javariensis. The bark of this species is used occasionally as a secondary ingredient of curare by the Javas in Peru and Brazil (1: 280). According to Schultes the roots (probably the bark of roots) are used also in Kofán curare (Rio Putumayo, Colombia) (7: 6). This species was studied by Folkers and Unna in 1937 (39: 692, 693) who demonstrated the presence of alkaloids which cause curare-like action in frogs. This work was done on stem bark of Krukoff 7654 collected in the basin of the lower Rio Javari, Amazonas, Brazil. The plant was referred to by them as “Strychnos sp. nov., related to S. diaboli Sandw.” and I described this species as S. javariensis Krukoff a few years later.
Distribution:Brazil South America| Colombia South America|