108 



not common are by no means so rare as has generally been 

 assumed. 



Of the more conspicuous liverworts abounding in the immediate 

 vicinity of the Garden, the biggest is Duniortiera trichocephala 

 (Hook.) Nees, which reaches gigantic dimensions, but on ac- 

 count of its extreme brittleness is almost impossible to remove 

 entire from the ground, to which it clings tenaciously. A curious 

 fact was brought to light in regard to this species by Prof. A. 

 Ernst, of Zurich, who was staying at Buitenzorg when I was 

 there. He found that the receptacles are very commonly her- 

 maphrodite. This is very easily confirmed on examination. 

 Professor Ernst has since published an account of this fact. 



Of the thallose Jungermanniales, aside from Treubia, several 

 genera, Pallavicinia, Metzgeria, and Riccardia, are common, and 

 the rare Calyailaria radiadosa Steph. was also found a number 

 of times. The genus Riccardia is especially abundant, including 

 some twenty or more species. Some of these are very large, R. 

 maxima Schiffn. having a thallus a centimeter or more in breadth, 

 but other species are exceedingly minute, e. g., R. parvtda 

 Schiffn. Of the twenty-four species of Riccardia given in Schiff- 

 ner's list, all but four are described as new. Whether these will 

 all hold remains to be seen. I have myself found it impossible 

 to distinguish certainly between his R. maxima and R. viridis- 

 sima, -and it may be that the number of species may not be quite 

 so great as he assumes. The commonest species oi Pallavicinia 

 is P. Levieri Schiffn., and of the two or three species of Metzgeria 

 the widespread M. liamata Lindb. is the most abundant. Of the 

 very numerous foliose liverworts one of the most striking was a 

 Schistochila, which was not at all rare. The curious little Zoopsis 

 argeiitea Hook. & Taylor was also collected but was not 

 common. 



During the month spent at Tjibodas daily excursions into the 

 forest were made, and one expedition lasting several days was 

 made to the summit of the mountain. This was full of interest 

 and many forms were collected which did not occur at the lower 

 levels. Near the waterfall of Tjiburrum, specimens of Marcliantia 

 cataractariun Schiffn. were found, a species as yet collected 



