cessful search. In late January, however, L6pez and I 
again penetrated to the base of Serra Tukano and were 
rewarded with flowering material. It happened to be the 
height of the flowering period, and a century set was 
made of one tree which was abundantly blossoming. It 
is significant to note in passing that, although the flowers 
of Micrandra Lopez have no odor perceptible to man, 
the trees, when in blossom, are frequented by literally 
thousands of large, black, stinging bees or wasps. AI- 
though we felled trees to collect material, the persistence 
of these insects made the task extremely unpleasant. 
In February, we found Micrandra Lopezii in the ca- 
atinga at Ipanoré, farther upstream from Serra Tukano. 
Micrandra Lopezii torma anteridifera PR. L. 
Schultes forma nova. 
Arbor usque ad septuaginta pedes alta, a Micrandra 
Lopezu trunco 18 poll. in diametro ad basim radicibus 
tabularibus late hebetato-rotundatis crassis sed non ex- 
tensis usque ad quattuor pedes altis armato, cortice gros- 
siuscule squamoso et foliis paulo coriaceoribus differt. 
Brazit: Estado do Amazonas, Rio Curicuriari, at base of Serra Cu- 
jubi. “‘Flowers yellow. Tree 70 feet tall, 14 ft. in diameter, columnar 
above, slight rounded buttresses up to 4 feet. Bark very thick (4 inch), 
reddish inside, reddish brown outside, rather shaggy, soft, peeling 
easily. Crown small. Leaves highly coriaceous, marginate, folded along 
midrib at a right angle. Latex sparse, thick, white, sticky, not coagu- 
lating well.’’ January 22, 1948, Richard Evans Schultes & Francisco 
Lopez 9637 (Tver in Herb. Gray); 9638. 
Micrandra Lopez forma anteridifera differs from M. 
Lopez in having low, bluntly rounded buttress-roots up 
to a height of about four feet and in having a much 
thicker bark which is very coarsely shaggy. These two 
characters are extremely constant in the colony of trees 
at the base of Serra Cujubi, where we examined more 
than eighty individuals. The lack of any slight indication 
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