128 
F. Cavers. 
discovered by Goebel 1 in Java, the gemmae, each of which consists 
of from two to four cells and is borne on a short stalk, are 
formed from the superficial cells of the stem. In Blasia and 
Cavicularia , the gemmae are larger and are produced in large 
numbers in special receptacles. 
Fig. 2. Blasia pusillci. Dorsal view of plant bearing four flask shaped 
gemma-receptacles, each with a long tubular neck ; the darkly shaded 
patches represent the Nostoc- cavities, two of which are usually found at the 
base of each of the broad lateral lobes or leaves, x 5. 
In Blasia pusilla (Fig. 2), the shoot consists of a broad stem 
bearing on either side a series of oval leaves which lie in the same 
Fig. 3. Blasia pusilla. Part of a longitudinal section, traversing a 
gemma-receptacle; from the inner surface of the receptacle there arise 
numerous gemmae in different stages of development, together with club- 
shaped mucilage-hairs, x 60. 
1 Goebel, K., Ueber Javanische hebermoose. I. Treubia insignis , 
Annales du jardin botanique de Buiteuzorg, Tome 9, 1890, 
p. 1. 
