is called Yauiyabu: in linga geral yaut is the name of 
this Anacardium and ya-bi is river. It is said that the 
tree is more abundant in the Yauiyabti than in the Dimiti 
itself. The cajutt here in the Dimiti is a stout tree often 
attaining a height of 75 feet, but usually less, with a very 
heavy and spreading crown. It loses its leaves yearly 
after the fall of the fruit and is now with light green 
leaves of the new flush — probably coming out in Feb- 
ruary.”’ 
J 
Brazit: Estado do Amazonas, Upper Rio Negro basin, Rio Negro, 
ot . A ° ae €é . . 
Sao Marcelino opposite mouth of Rio Xié. “Low tree with spreading 
crown; very stout, gnarled trunk. Old leaves very thick, coriaceous. 
Cajuti.’? January 5, 1948, Richard Evans Schultes & Francisco Lopez 
9564. — Estado do Amazonas, Upper Rio Negro basin, Rio Dimiti. 
““Cajutt. Medium-sized tree in dense forest, standing in flooded hum- 
mocks. Leaves coriaceous.’’ May 12-19, 1948, Richard Evans Schultes 
§ Francisco Lopes 9976. 
Senefelderopsis Steyermark gen. nov. 
Arbores vel frutices lactiferi. Stipulae nullae. Folia 
penninervia integerrima petiolata supra basin limbi 
maculari-glandulosa. Flores monoici apetali. Discus 
nullus. Inflorescentiae terminales vel axillares simplices 
vel paniculatim ramosae. Rami spiciformes, bracteis basi 
biglandulosis obsiti, e quarum axillis inferioribus flores 
foeminei 1-2 solitarii, e reliquis flores masculi ternati vel 
geminati parvi. Calyx masculus 8-partitus imbricatus, 
foemineo 8-partito imbricato. Stamina 2-8. Ovarii rudi- 
mentum nullum. Antherae biramosae, loculis longitror- 
sum adnatis. Ovarium 8-loculare. Ovula in loculis pen- 
dula solitaria. Semina carunculata. 
Type species: Senefelderopsis Croizatii Steyermark. 
This genus combines some of the characters found in 
Sapium, Sebastiania and Senefeldera. Except for the 
abundant latex found in all parts of the plant, the deeply 
3-parted staminate calyx, the 2-8 stamens of the stami- 
nate flower, and the bilobate tips of the style branches, 
[ 45 ] 
