167 
II. Two still growing branches with a number of leaves, all 
of them alternate. 
Jasminum Horsfieldii Maiq. 
Habitat Banka. 
Coll. November 1896. 
Leaf with double apex, the midrib splitting up already under 
the middle. 
APOCYNACEAE. 
Plumeria acutifolia Poir. 
Habitat Mexico. 
Coll. January, March, April 1895, May 1896. 
In our paper of 1895‘) we had an opportunity of drawing 
attention to a leaf of Plumeria acutifolia which bears on the 
back of the blade a stalked pitcher. Already at that time we 
entered into a comparison of that case with Trifolium repens, 
in which, as in strawberries (p. 153), it may occur that 
the apical portion of the terminal leaflet through a series of 
transitions differentiates to a long stalked pitcher and even, 
with loss of the pitcher, to a mere thread-like stalk as conti- 
nuation of the midrib. Mr. Smiraz has been fortunate enough, ever 
since 1895, to find a number of different leaves of Plumeria, 
which mark still stronger the conformity with the phenomena 
in Trifolium repens. 
In that manner Fig. 80 shows the upper portion of a blade 
with two foliaceous excrescences springing from the midrib 
exactly side by side another. The left outgrowth, light coloured 
in our figure, coheres upwards with the unequal apex, whereas 
the right one, dark toned, is much smaller and does not 
reach the end of the midrib. The different tinges correspond 
with those of the upper- and undersurfaces of the blade and 
indicate that the two excrescences have their light inferior 
surfaces facing one another. For the sake of clearness it should 
1) Annales de Buitenzorg Vol. XIII p. 97—120. 
