312 
From an economic standpoint the fact that crown-gall is due to a 
living organism enables a definite scheme for its prevention to be 
formulated, and the fact of its being contagious—which is admitted 
by all who have investigated the subject—should lead to measures 
for the prevention of its wholesale dispersion, on the part of both 
nurserymen and fruit growers. 
EXPLANATION OF PLATE. 
1.—Crown-gall in fresh condition on the root of Chrysanthemum 
frutescens, L., the Paris daisy. 
2.—An exolete or woody condition of crown-gall on the root of 
a cultivated rose tree. Both figures half natural size. 
XLVII—NEW LAURACEAE FROM THE MALAYAN 
REGION; III. 
J. S. GAMBLE. 
Actinodaphne montana, Gamble [Lauraceae-Litseeae]; species 
A, angustifoline, Nees, affinis et forsitan ejus varietas sed folia nervis 
supra haud prominentibus et perianthii tubus fructifer mul 
longior. 
fusci, glabri, striati ; perulae ovatae, acuminatae, apicibus recurvis. 
illis ad 
Manay Prnrnsuna. Perak: mount 
1100 m., King’s Collector, 2129, 2913. 
Actinodaphne Ridleyi, Gamble [Laur 
1 bl aceae - Litseeae]; species 
A, malaccensi, Hook. f£., affinis, foliis angustioribus pea oasee 
ot floribus minus congestis et igoeen lobis longioribus 
ain tops near Larut, 900- 
Pe : oy : 
ae ?; ramuli teretes, Juniores ferrugineo-pubescentes. Folia 
chartaceo-coriacea, 4-6 in verticillis, lanceolata, api i 
