418 The Philippine Journal of Science 1921 
of about 45° from their main stem. The tree has a very dense 
growth of branches and twigs (Plate 10, fig. 2). The branches 
are almost thornless; when thorns do appear, they are very rudi- 
mentary and hardly noticeable. The bark of the tree, which is 
quite smooth, is brown and streaked with yellow lines. The 
young stems, somewhat downy, are of characteristic pummelo 
shape and color. 
LEAVES 
The leaves of the trees of the Kao Pan variety form somewhat 
densely on the trees, but do not appear to be of so hardy a 
character as does the foliage of other varieties perhaps nearer the 
wild stock. Leaves vary somewhat in size and shape, being 
from 7.5 to 14 centimeters long and 4.5 to 7 centimeters wide; 
the margin is slightly wavy or scalloped, especially on the upper 
half of the leaf. Most of the leaves are of the small type and 
are flattened at the tip and markedly indented. The petiole, 
with variable wings, varies in size and shape, in many leaves 
being distinctly narrowed and shaped somewhat like that of 
the orange leaf. The veining of the leaves is very prominent 
and extends from the midrib at an angle of almost 60°. There 
is a distinct marginal veining of the leaf. 
FLOWERS 
Trees of the Kao Pan pummelo in Nakorn Chaisri flower three 
or four times each year and are practically ever-bearing. The 
flowers are usually formed on young stems of considerable length, 
which shoot out quite upright from the branches of the previous 
year’s growth (Plate 11, fig. 1). At the terminal end of the 
flower stem there may or may not appear a cluster of Jeaves 
(Plate 11, fig. 1). The number of flowers appearing on a single 
flower stalk varies; sometimes there are as many as fifteen or 
twenty in a cluster (Plate 8, fig. 4), which measures 7.5 centi- 
meters in length and 4.5 centimeters across. There seems to be 
little difficulty for the flowers to set fruit, but as a rule not more 
than two or three fruits are allowed to mature in a cluster. The 
petals of the flowers are about 2 centimeters long and spread 
to a diameter of about 5 centimeters when the flower opens 
(Plate 11, fig. 3). The white color and the decided fragrance 
make a cluster of the flowers very attractive. 
FRUIT 
The fruit of this variety, unlike many of the pummelos grow- 
ing in the Orient, is of a decidedly rounded, somewhat flattened 
