"TILIACEAE 
Heliocarpus popayanensis HBK. Nov. Gen. et 
Sp. 5 (1821) 341. 
A very common and rather widespread tree, Helio- 
carpus popayanensis has apparently not previously been 
reported from Amazonian Colombia. 
CoLompia: Comisaria del Putumayo, Mocoa y los alrededores al 
norte. Alt. 750-850 m. ‘Small tree. Balso blanco. Urtequillo blanco.’’ 
Dec. 3-7, 1942, Richard Evans Schultes 2077. 
BoMBACEAE 
Bombax coriaceum Martius & Zuccarini Nov. 
Gen. et Sp. 1, 98 in obs.; K. Schumann in Martius FI. 
Bras. 12, pt. 8 (1886) 219; emend. Dugand in Caldasia 
no. 10 (1944) 435. 
This collection extends the known range of the dimin- 
utive Bombax coriaceum far to the east and indicates that 
probably the species will be collected in Venezuela. The 
type came from Araracuara on the Rio Caqueta, where 
Martius found it in 1820 on the sandstone savannas which 
are so extensive there. More than one hundred and 
twenty years elapsed before it was rediscovered (Schu/tes 
5461 and 5616) on the sandstone hills in the upper Apa- 
poris basin—hills geologically and geographically the 
same as those at Araracuara two hundred kilometers dis- 
tant—and on sandstone savannas at the headwaters of 
the Cuduyari and Cubiyti (Allen 3090) about two hun- 
dred kilometers to the east of the Apaporis locality 
(Dugand in Caldasia no. 8 (1943) 298; no. 10 (1944) 
435). The present collection (Schultes & Lopez 9342) ex- 
tends the known range another two hundred and fifty 
kilometers eastwards, and places Bombaa coriaceum in 
the great Rio Negro basin. This still further strengthens 
our belief (based upon the study of the distribution of a 
number of plants of eastern Colombia and southern 
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