350 SEIFRIZ: THE TALIPOT PALM AT PERADENIYA, CEYLON 
with their permission. The writer wishes to express his indebt- 
edness to Platé, Ltd., for their kindness in keeping him posted 
on the condition of palms.in the Peradeniya Gardens. 
BIBLIOGRAPHY 
1. Briickner, E. Klimaschwankungen, Vienna, 1890. 
2. Burkhill,I.H. The flowering of the pigeon orchid, Dendro- 
bium crumenatum, Gardens’ Bull., Straits Settlements, 
1,400, 1917. 
Humphreys, W. J. Phyaies of the air, (U.S. Weather Bur.) 
Philadelphia, 1920. 
4. Huntington, E. and Vischer,S.S. Climatic changes, their 
nature and causes, New Haven, 1922. 
Kawamura, S. On the cause of the flowering of bamboo, 
Bot. Mag. Tokyo, 25, 294, 1911 (Japanese), Abstr. in 
Zeitschr. Pflanzenziicht. (Fruwirth), 1, 96, 1912. 
6. Klebs, G. Uber die periodischen Erscheinungen tropis- 
cher Pflanzen, Biol. Centralbl., 32, 257, 1912. 
Schimper, A. F. W. Plant Geography, Oxford, 1913. 
Seifriz, W. The length of the life cycle of a climbing 
bamboo. A striking case of sexual periodicity in Chusquea 
abietifolia Griseb., Amer. Jour. Bot., 7, 83, 1920. 
9. Seifriz,W. The gregarious flowering of the orchid, Dendro- 
bium crumenatum, Amer. Jour. Bot., 10, 32, 1923. 
10. Seifriz, W. Observations on the causes of gregarious 
flowering in plants, Amer. Jour. Bot., 10, 2, 1923. 
11. Volkens,G. Laubfall und Lauberneuerung in den Tropen, 
Berlin, 1912. 
12. Wieland, G. R. Monocarpy and pseudocarpy in the 
cycads, Amer. Jour. Bot., 8, 218, 1921. 
% 
on 
ODS 's 
Description of plate 8 
view down the avenue of talipot palms (Corypha umbraculifera) 
in the Peradeniya Gardens, Ceylon, in August, 1922. (Photo. by Platé, Ltd.) 
Description of plate 9 
he avenue of talipot palms in the Peradeniya Gardens in August, 1922. 
The floral crowns of eight Coryphas can be counted. Five palms remain in 
foliage. (Photo. by Platé, Ltd.) 
