strikingly, by the peculiar round shape of the long-stipi- 
tate samara. 
Cotompra: Comisaria del Amazonas, trapecio amazénico, Loretoyacu 
River. Alt. about 100 m. ‘*Extensive vine. Fruit red.’’ September— 
November 1944, Richard Evans Schultes 6070 (Tyrer in Herb. Gray). 
STYRACACEAE 
Styrax Tessmannii Perkins in Notizbl. 10 (1928) 
459, 
This species, described from material collected along 
the Rio Ucuyali in the Departamento de Loreto, Pert, 
has hitherto not been reported from Colombia. Schultes 
7144 has larger leaves than those described from the type, 
but all other reported characters appear to agree. 
Cotompra: Comisaria del Amazonas, trapecio amazénico, Amazon 
River watershed, Loretoyacu River. Alt. about 100 m. ‘“Small tree 
on highland,’’? March 1946, Richard Evans Schultes 7144. 
APOCYNACEAE 
Couma utilis (Wart.) Mueller-Argoviensis in Mar- 
tius Fl. Bras. 6, pt. 1 (1860) 19, t. 5. 
The collections cited below are apparently the second 
and third known from the Comisaria del Vaupés in Co- 
lombia (J. Monachino in Lloydia 6 (1948) 237, ibid 9 
(1946) 801). It would seem that this species is associated 
only with the granitic ‘‘Brazilian shield’’ portion of east- 
ern Colombia. It is known also from the Amazon of 
Brazil (especially the Rio Negro and Rio Madeira basins) 
and Venezuela. 
Cotomsra: Comisaria del Vaupés, Rio Negro, Cocui. ‘‘Sorva. Col- 
umnar tree, 24 feet in diameter, 75 feet tall. In flood-bank. Bark 
very thick, smooth but checked outside, grey and black, soft, reddish 
inside. Latex extremely thick, abundant, white, very sticky. Leaves 
dark green above, pale beneath. Flowers fragrant, pinkish to white.”’ 
December 26, 1947, Richard Evans Schultes & Francisco Lopez 9467 .— 
Same locality and date. ““Small columnar tree, 15 ft. diameter, 50 
feet tall. Crown wide. Flowers pink, fragrant. Latex very abundant, 
thick, white. Bark smooth, black-grey.’’ Schultes & Lopez 9485. 
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