16, 1936. (Herb. Arn. Arb.; Herb. Field Mus. 902328; Herb. Mo. 
Bot. Gard. 1158515; Herb. N.Y. Bot. Gard.; U.S. Nat. Herb. 
1693155, 1694262; Herb. Jard. Bot. Rio 35437; Herb. Kew).— 
Manaos, Estrada do Aleixo, ‘‘Silva non inundabili. Arbor magna flor- 
ibus albidis.’? 4. Ducke 848, December 18, 1941. (Herb. Mo. Bot. 
Gard. 1255541; U.S. Nat. Herb. 1875676; U.S. Nat. Arb. Herb. 
167007).—Manaos, Igarapé do Crespo. “‘Ad marginem igapo. Arbor 
magna floribus albidis. 4. Ducke 1087, December 12, 1942. (Herb. 
Mo. Bot. Gard. 1263939; U.S. Nat. Herb. 1832363; U.S. Nat. Arb. 
Herb, 167008, 167009).—Tonantins. ‘‘Mata da terra firme, logar um- 
ido. Arvore muito grande; flor. brancacenta. Arbor maxima floribus 
albidis.’? 4. Ducke 1554, February 10, 1944. (Herb. Arn. Arb.; U.S. 
Nat. Herb, 1906514; U.S. Nat. Arb. Herb. 167213).—Manaos. 
‘*arvore. Mata.’’ Ricardo de Lemos Frées 20505, Feb. 22, 1945 (U.S. 
Nat. Arb. Herb. 182200).—Sao Paulo de Olivenca. “‘ Mata, caatinga. 
Arvore.’’ Ricardo de Lemos Frées 20697, April 1945. (U.S. Nat. Arb. 
Herb. 182201). 
Cunuria Spruceana var. bracteosa is one of the most 
widespread concepts of the genus. It is found in the 
upper Rio Negro in close proximity to Cunuria Spruce- 
ana; it is apparently frequent in the vicinity of Mandos; 
and it is known from the Rio Solimdées. On the highland 
forest floor near San Pedro on the Rio lea (Putumayo), 
between the Colombian boundary and the mouth of the 
river, Schultes, in 1946, saw fruit and seed of what ap- 
parently is C. Spruceana var. bracteosa. This is the west- 
ernmost known locality for the variety. 
Cunuria Spruceana var. bracteosa is very easily recog- 
nized and separated from C. Spruceana by having re- 
markably large floral bracts and large foliaceous stipules 
which are extremely persistent. In herbarium specimens, 
the leaves of the variety invariably dry a glossy straw- 
color, while those of the species always turn a dull, dark 
brown. Furthermore, the nerves of the former are yel- 
low when dry and are not elevated; those of the latter 
are dark brown when dry and are very prominently ele- 
vated. The capsule and seed of var. bracteosa are very 
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