225 
The twining Selaginella is very frequent, not only near the 
villages, but far away in the forest, ascending trees to 20 feet, and 
sometimes forming an impenetrate thicket. 
andsome Polypod, sometimes 8 feet high, is frequent. 
About the village there are beds of a Davallia, 3-7 feet high, 
remarkable for the triangular outline of the fronds; and a 
Pteris, at first glance resembling Preris caudata, but prickly. 
On branchlets of trees by rivulets is a minute Asplenium, allied 
to A. Ruta-muraria, not observed before. 
From Puca-yacu to Canelos many Pastasa trees still occur, 
e.g. Ama-Sisa, Homaliacea, and the palms Wettinia maynensis and 
Biroti-wasi. 
cliffs 
Orchids begin to be less unfrequent. A large-flowered 
Sobralia, allied to that of Campana, grows on wet cliffs, and on 
an inundated stump I saw the Tarapoto Cypripedium. 
XXVIIIL—WITCHES’ BROOM OF CACAO. 
(Colletotrichum luxificum, Van Hall & Drost.) 
During 
Cacao tree (Theobroma Cacao, Gaertn.), has been prevalent in 
Surinam. In 1906 the same disease was observed in Cacao 
and this certainly did not belong to an Exoaseus. 
Quite recently Dr. C. J. J. Yan Hall, Inspector of Agriculture 
in Dutch Guiana, and Mr. A. W. Drost, have paid much 
attention to the subject, and have proved that the disease is dnp # 
@ parasitic fungus they have named Colletotrichum luxificum. o 
Pa 
