270 PHILIPPINE BAMBOOS 
There is, however, reason to believe that much better results 
than those recorded in Table 4 could be obtained as the dry 
season of 1918 was unusually severe and the plants were not 
irrigated. It will be noticed that there was a high percentage of 
mortality between December, 1917, and June, 1918. Moreover, 
many of the plants were probably subjected to too much shade, 
as they were freed from vines only once during the year and in 
general those plants which survived received more light than 
those which died. 
The total cost of selecting, transporting, and planting the cut- 
tings was 72.82 pesos per thousasd. This cost was considerably 
more than in the case of the 1912 plantation, which is accounted 
for by the greater care used in the selection of cuttings for the 
second than the first plantation. The superior cuttings used in 
1917, however, gave much better results than the poorer ones 
employed in 1912. 
It appears from the data derived from the planting at Los 
Banos that the commercial planting of bamboo on a large scale 
would be very profitable and that bamboo should be a valuable 
reforestation crop. 
A number of bamboos, other than those here considered, have 
been propagated from hard-wood cuttings at the Division of 
Investigation of the Bureau of Forestry at Los Banos, and it is 
probable that all or most Philippine bamboos can be thus re- 
produced. 
GROWTH OF MATURE CLUMPS 
Actual measurements of growth of canes in mature clumps 
are available for only three species, Bambusa spinosa, Bambusa 
vulgaris, and Gigantochloa levis. A clump of Bambusa spinosa 
sends up yearly a number of shoots, the number in some cases 
being as large as 130. In clumps from which the mature canes 
are harvested, the number of new shoots may exceed the num- 
ber left in the clump when the new culms are produced. A 
considerable proportion of the young shoots die before reaching 
maturity, many of them while still quite small. In Table 5 are 
given observations on the number of shoots produced by 8 clumps 
of Bambusa spinosa. The greatest number of canes produced 
by any clump recorded in Table 5 is 128; these grew from a 
clump having 49 mature canes. However, only 24, or 19 per 
cent of the 128 canes, reached maturity. The average of all 
the canes produced, by the 8 clumps, which reached maturity 
is 28.5 per cent. In all, the number of mature canes produced 
is 46.5 per cent of the total mature canes originally in the 
clumps. 
