seems advisable to quote the notes on Allen 3050 and 3061. The 
collection Allen 3061 has been identified erroneously as M. 
minor Benth. 
Micrandra Spruceana (Bai/llon) R. E. Schultes in Bot. Mus. 
Leafl., Harvard Univ. 15 (1952) 217. 
COLOMBIA: Comisaria del Vaupés, Rio Papuri, Santa Teresita Mission. Alt. 
c. 200 m. “Tall trees, averaging 35 m. in height and 80 cm. in diameter above 
the conspicuously developed, nearly unique stilt buttresses which are 
produced to a height of 3-4 m. as laterally compressed board-like flanges 
which act as ‘flying-buttresses’ often high enough to allow a man to stand 
beneath them. Leaves simple, with two basal disk-like glands. Inflorescen- 
ces of small green flowers from axillary new growth. Large tri-spermate 
seed capsule typical of Hevea. Bark very thin (6-8 mm.) with scanty latex 
which coagulates with difficulty, producing a non-elastic gum. Seeds 
collected for food. Known locally as wak-puh (Tucano).” August 15, 1943. 
P. H. Allen 3063. 
PERU: Departamento de Loreto, Provincia de Maynas, Rio Ampiyacu, Pebas 
and vicinity. April 10, 1977. 7. Plowman, R. E. Schultes et O. Tovar 
6735, Puca Urquillo and vicinity. “Tree 65 m. tall with large buttresses, 
forming interwoven props at base. Growing in upland pri mary forest. Latex 
white, sparse. Fruit green. Seeds brilliant, smooth, red-brown.” April 27, 
1977. Plowman, Schultes et Tovar 695]. 
Although a very abundant element of the flora of the north- 
west Amazon, little has been known about the latex of 
Micrandra Spruceana. Allen 3063 has an unusually detailed set 
of notes which have not hitherto been published. 
The two Peruvian collections appear to be the first from Peru. 
They were made during Phase VII of the Alpha Helix Amazon 
Expedition 1976-1977. 
Plowman, Schultes et Tovar 6951 is the voucher collection for 
Dragendorff spot test for alkaloids made in the Alpha Helix 
laboratory during the expedition: the species was found to be 
alkaloid-negative. 
Micrandra Sprucei (Mueill.-Arg.) R. E. Schultes in Bot. Mus. 
Leafl., Harvard Univ. 15 (1952) 218. 
COLOMBIA: Comisaria del Vaupés, Rio Papuri, vicinity of Piracuara Mission. 
Alt. c. 200 m. “Tall trees, slightly buttressed, averaging 30 m. in height 
and 60 cm. in diameter. Bark thin, averaging less than 1 cm. Latex 
yellowish, scant, coagulating to a non-elastic gum. Tri-spermate, Hevea- 
like capsule. Known locally as wak-so-ne-ne (Tucano).” August 18, 1943. 
P. H. Allen 3068. 
106 
