Studies on some Javanese Anthocerotaceae. II. 
BY 
DOUGLAS HOUGHTON CAMPBELL. 
Professor of Botany in Stanford University. 
With Plates IX and X, and two Figures in the Text. 
HE conditions in Western Java are especially favourable for the 
x growth of Hepaticae, and among these is a large number of 
species of the Anthocerotaceae, of which many were collected. In a 
recent paper (Studies on some Javanese Anthocerotaceae, I, Ann. of Bot., 
vol. xxi, p. 467) two of these species, which were referred to a new genus, 
Megaceros , were described. The present paper is concerned with the 
species of Dendroceros and Notothylas , collected at the same time. 
The species of Dendroceros are all tropical, and the first ac- 
count of the development of these we owe to the researches of Leitgebd 
Leitgeb studied several species of Dendroceros , and although he had only 
herbarium material to work with, he succeeded in making out the most 
important points of structure in the reproductive organs and embryo. 
The writer collected in Jamaica two species, D. Breutelii , N. ab E., and 
D. crispus ?, and was able to add a number of details which the insufficiency 
of his material prevented Leitgeb from noting. 2 
But one species of Dendroceros , D. javanicus , N. ab E., has been 
hitherto recorded from Java, 3 but during the writers stay in the island two 
very distinct species were collected, one at Tjibodas, the other at Lebak 
Saat on Mount Gedeh. Search was made for Dendroceros in the neighbour- 
hood of Buitenzorg, but without success. As the species collected at 
Tjibodas was very inconspicuous and difficult to find, it is quite likely 
that the same or some similar species may occur at the lower level. 
The original description of D. javanicus was not available, and for the 
present it must remain uncertain which (if either) of the species here 
described is the true D. javanicus. At Tjibodas, on the trunks of two or 
1 Untersuchungen iiber die Lebermoose, iv, 1879. 
3 Campbell, On the Structure and Development of Dendroceros , Nees, Journ. Lin. Soc. London, 
xxxiii, p. 467, 1898. 
3 Schiffner, Conspectus Hepaticarum Arcliipelagi Indici, Batavia, 1898. 
[Annals of Botany, Vol. XXII. No. LXXXV. January, 1908.] 
