the Arnold Arboretum. It clearly represents one of the 
numerous variants of Hevea pauciflora. A good photo- 
graph of Baldwin 3669, a specimen of which I have not 
seen, has been published (in Am. Journ. Bot. 34 (1947) 
264, fig. 2). It represents the same variant of the Hevea 
pauciflora complex as Baldwin 3670. Although these 
collections, with fruit but lacking flowers, exhibit simi- 
larities in certain characters with typical Hevea rigidi- 
Jolia, it is highly inadvisable, in my opinion, to consider 
them as representing this peculiarly distinct species. 
Several valves of the capsule which accompany Bald- 
win 3670 would appear to be typical of Hevea rigidifolia 
in the shape and size of the few seeds, for both approach 
somewhat the analagous fruiting material of /’rdes 21258. 
The ligneous valves of Hevea rigidifolia are peculiar to 
that species, being large, long and narrow with unusually 
thick endocarp, and very strongly twisted due to the 
explosive opening of the capsule; whereas in Hevea pau- 
ciflora var. coriacea the valves are smaller, as broad as 
long and have relatively thick and strong ligneous walls 
which are not in the least distorted during the explosive 
shedding of the seed. The peduncle of the fruit, pre- 
served in Baldwin 3670, is like that of Hevea rigidifolia. 
However, it is in a study of the leaflets, so extraordi- 
narily constant in typical Hevea rigidifolia, that doubts 
arise as to the real identity. Although the under surface 
of the leaflets of Baldwin 3670 is armed with the minutely 
tessellate, waxy scales which lend the peculiar dull waxy- 
gray color to that part of the leaf of Hevea rigidifolia, 
the individual scale-like mosaic points are much smaller 
in the Baldwin collection than is normal for Hevea rigid- 
ifoha. It is, however, principally in the texture and gen- 
eral appearance of the leaflets that Baldwin 3670 deviates 
most from typical Hevea rigidifola. The leaflets are long 
and narrowly lanceolate-elliptic, departing from the very 
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