65 
on the petioles, being then mostly oe but sometimes mo- 
re ball-shaped. 
In addition to its ocurring on 
Java'), we also know this gall 
from the island of Saleier ”). 
Verlaten-Island, in the Casua- 
rine-grove. 
Herb. N°. 37266; April 
27th 1919. 
Literature: 1) Einige Gallen aus Java. 
eitrag V. Marcellia. 
Vol. X, 1910, p. 69. 
N®. 208 and 209, 
2) Einige Gallen aus Saleier. 
Bull. d. Jard. Bot. Buiten- 
zorg. Série II, N® XXI, 
1916, p. 27, N°. 12. 
Fiz. 2. Clerodendron inerme Gaertn. 
N®. 2. Derris uliginosa Benth. 
A flower-gall formed by a gall-gnat. 
This is a remarkable gall which alters the shape 
of the flower to such an extent that nothing re- 
mains of the original papilionaceous type. In 
Java') this gall is only known to have been 
found in one place. On Krakatau however it was 
very common and abundant, so that on hundreds 
of plants, growing side by side, not a single nor- 
mal flower was to be seen. 1 did not find it 
on Verlaten-Hiland. The specimens described and 
illustrated before were very young. Now I came 
across galls in every stage of development, as is. 
visible in the inflorescence reproduced (see fig. 3). 
The exterior of the gall is formed by the consi- 
derably enlarged calyx -which grows out into a 
shape like that of the calyx of a Physalis-fruit. Thus balloon- _ 
shaped galls are formed, flattened at the base and top, bearing — 
a spikelet at the centre of the apex. In this little eminence = 
there is an opening giving access to the interior of the gall, 
Fig. 3. Derris uligi- 
nosa Benth, 
