159 
Coll. May 1896. 
The normal leaves are bipinnate, viz. the whole leaf %-paired 
equally pinnate and the leaflets many-paired equally pinnate. 
A deviation often presenting itself in the Buitenzorg Gardens 
consists in the appearance of an extra many-paired pinnate 
leaflet springing from the base of the petiolules of 1, 2 or 3 
of the superior leaflets (fig. 62). 
In one case the additional leaflet had the topmost pair of 
leaflets grown together as is shown in figg. 63 and 64. 
Our figures make it more probable that the extra leaflet is 
to be considered as a product of dichotomy of the petiolule 
and is consequently to be compared with the whole leaflet 
from which it springs. 
PLUMBAGIN ACEAE. 
Plumbago rosea U. 
Habitat Tropical Asia. 
Coll. January 1895. 
One of the leaves transformed into a pitcher (fig. 65). 
Petiole very long as frequently occurs with pitchers. 
CON VOLVULACEAE. 
Ipomaea spec. 
Coll. August 1595. 
Leaf with double apex. As fig. 66 shows there is, as usually 
in double tops, no question about a divided midrib nor about 
a stunted one. The midrib is simply shorter than in normal 
leaves whereas the lateral veins show a stronger development. 
Lpomaea mammosa Chois. 
Habitat Cochinchina. 
Coll. December 1895. 
A leaf having the shape of a cup terminates the stem. The 
petiole 2 cM. long follows the line of the stem, produced, but 
is distinct from it by less firmness; of a bud there is no trace 
to be seen (fig. 67). 
