IN CEYLON. 
485 
Canthium macrocarpum , Peradeniya. —During 1901 and 
1902 the trees became leafless in February and produced 
new foliage and flowers in March. 
Ficus infectoria . Deciduous. Trimen, Vol. IV., p. 92. 
Endemic ? 
12.—Foliar Periodicity of the Indigenous Species 
There are in Ceylon nearly 380 arborescent indigenous 
species. In Trimen’s Flora thirteen of these, the periodicities 
of which have since been confirmed, are described as deci¬ 
duous. To these must be added the foliar periodicities 
of other sixty-five species. The total seventy-eight species 
are distributed among twenty-four natural orders. Nearly 
twenty per cent, of the indigenous species are deciduous, 
and in order to bring forward any possible relationship 
between the length of the leafless phase and the distribution 
of the species their periodicities have been described under 
the headings of the countries in which they are known to 
occur. The following is a plan of the arrangement 
adopted :— 
1. Ceylon and India. 
2. Ceylon, India, and Malaya. 
3. Ceylon, India, Malaya, China, &c. 
4. Ceylon, India, Java, China, and Japan. 
5. Ceylon, India, and Java. 
6. Ceylon, India, and Africa. 
7. Ceylon, India, Malaya, Tropical Africa, &c. 
8. Ceylon, India, and East Africa. 
9. Ceylon, Malaya, and Australia. 
10. Ceylon, Tropical Asia, &c. 
There are several natural orders containing large num¬ 
bers of indigenous species which grow into large trees, 
such as the Guttiferæ with 9, Apocynaceæ with 7, Boragineæ 
and Rhizophoraceæ each with 6, and Dipterocarpaceæ and 
Oleaceæ each with five species, but not one of these seven 
orders contains an indigenous deciduous species. 
8(9)05 (17) 
