camporum to the H. pauciflora complex. It certainly is 
not referable to Hl. pauciflora itself, and it would seem to 
be only very slightly more reduced in size than many nor- 
mal individuals of H. pauciflora var. coriacea. Whether 
or not it may properly be called a forma of this concept 
must await further study, and, for this reason, I have 
placed Hevea camporum in synonymy under HZ, pauci- 
Hlora var. coriacea with some reservation. The whole 
appearance of the leaflets (especially their glandular- 
calloused tips, which, as Seibert (in Ann. Mo. Bot. Gard. 
34 (1947) 278) has convincingly demonstrated, are found 
only in Hevea pauciflora), of the tiny seeds, and of the 
valves of the capsule is strikingly like that of many in- 
dividuals of Hevea pauciflora var. coriacea. 
Interest was reawakened in Hevea camporum with the 
recent discovery, on flat-topped sandstone mountain sa- 
vannahs in Amazonian Colombia, of another dwarf rep- 
resentative of Hevea. This Colombian treelet— Hevea ni- 
tida Mueller-Argoviensis var. tovicodendroides (Schultes 
& Vinton) Schultes, described as Hevea viridis Huber 
var. towicodendroides Schultes & Vinton (in Caldasia 3 
(1944) 25)—was shown to be specifically indistinguish- 
able from Hevea nitida which, although usually a me- 
dium-sized caatinga-tree, may become a large forest tree 
in some regions (Schultes in Bot. Mus. Leafl. Harvard 
Univ. 12 (1945) 11). In 1945, I discussed (in Rev. Acad. 
Col. Ciéne. Exact. Fisico-Quim. Nat. 6 (1945) 386) 
the superficial habitat resemblance between Hevea cam- 
porum and H. nitida var. toaicodendroides and quoted 
Dr. Adolpho Ducke who, ina letter dated May 5, 1945, 
had written to me: ‘‘I am inclined to think that A. 
camporum would eventually be (considered) a dwarf form 
of HI. pauciflora var. coriacea, as your toaicodendroides 
is of the typical viridis. The leaves of camporum resemble 
small leaves of pauciflora var. coriacea.’’ Ducke (in Bol. 
[ 269 ] 
