Contributions from the Cryptogamic Laboratory of Har- 
vard University. XXXIII. 
Development of the cystocarp of Champia parvula, 
BRADLEY MOORE DAVIS. 
WITH PLATES VII AND VIII. 
Champia parvula (J. Ag.) Harv. is representative of a type 
of carposporic reproduction remarkable for the phenomenon 
of cell fusion which takes place previous to the formation of 
the glomerule of spores. This genus together with Chylocla- 
dia and Lomentaria form a group agreeing with each other, 
according to Hauptfleisch,1 in the essential points of the de- 
velopment of the cystocarp. The steps in this process, as 
described by Hauptfleisch, are very interesting and, as the 
subject is complex, the writer thinks that he cannot better in- 
troduce the matter which treats of his own observations than 
by giving first a brief summary of the results obtained by the 
first investigator of the fruit development of these forms. 
bearing a delicate tri i ; 
te trichogyne which projects through the outer 
wall of the frond. ay. De : 
a there is developed an auxiliary cell (two in Chylocla- 
bears 
-1€n divides into an upper and a lower cell. The upper 
Cell is the auxiliary cell. i 
wie When the carpogonium is fertilized the trichogyne 
*rs. The cells of the procarpic branch then gradually 
1 < - : 
ond 12tPtfeisch, Die Fruchtentwickelung der Gattung Chylocladia, Champia, 
5: 306. 1892. 
[109] 
€ntaria. Flora 7 
