12 
REPORT ON THE CAOUTCHOUC OE COMMERCE. 
C. Markhamicma, Collins, sp. nov. (Plate 3). 
Vernacular Name. — Ule-TTle. 
Geograpliic Distribution. — Panama (Sutton Hayes !) 
Description. — Leaves alternate, petiolate, oblong-acumi- 
nate, margin serrate, younger leaves entire, with a long 
slender nearly entire acuminate apex, and a rounded, 
not cordate base, upper surface glabrous, under surface, 
midrib and veins covered with stiff hairs; lamina as 
much as 13 inches long and nearly 7 inches broad, 
the midrib giving off from 18 to 20 lateral well-marked 
veins. Petiole semiterete, clothed with stiff hairs, about 
three lines long. Stipule axillary, solitary elongate- 
triangular, glabrous within, covered with stiff hail’s on 
the outside, caducous, half an inch in length. 
Male dowers unknown. 
Pemale flowers, many aggregated in a plane involucrate 
nearly sessile axillary receptacle. Perianth tubular 
formed of four oblong thick leaves, covered externally 
with short stiff hairs. Style short cylindrical, with two 
thick leaf- like stigmas having serrated edges. Ovary, 
one celled, and one seeded, the ovule suspended from 
the top of the cell. 
A small tree 20 feet high. In low woods, Lion Hill, 
Panama Hailwav Station (Sutton Hayes, No. 7 ! in 
Herb., Brit. Mus., Kew, et Collins). 
Remarks. — This plant, of which the materials at hand will 
not admit of a fuller description, differs from C. elastica 
in being pubescent on the nerves and petioles only, and 
not on the parenchyma of the leaves ; in the margins of 
the leaves being dentate, the leaves of the C. elastica 
being entire, the villous brushes of stiff hairs on the 
margin being likely to be mistaken for serratures, and 
also in being somewhat smaller, ovate, the (7. elastica 
being almost panduriform and somewhat auricular at 
the base. Mr. Sutton Hayes describes its general ap- 
pearance as being very similar to C. elastica , having 
spreading branches, stem smooth, four or five inches 
in diameter, the fruit a little different, of a red colour, 
and covered with a silky pubescence, but the most 
