332 Durand : Marchantia polymorpha 



tivity begins in the stalk. Each component cell divides repeatedly 

 in a direction transverse to the long axis of the sporogonium, so 

 that very regular rows of cells are produced between the foot and 

 the capsule. The latter is thus pushed outward until the calyptra 

 is ruptured at its apex. At first the cells of the stalk are broader 

 than long, but later they increase greatly in length so that the 

 stalk elongates, pushing the capsule beyond the surrounding 

 perianth. As the capsule dries it ruptures at the apex into numer- 

 ous lobes so that the spores and elaters are set free. 



Bibliography 



Only the principal original literature dealing with embryology of 

 Marchantia polymorpha is here included. 



Bischoff, G. W. Bemerkungen iiber die Lebermoose, vorziiglich aus 

 den Gruppen der Marchantieen und Riccieen. Nova Acta Acad. 

 Leop.-Car. 17: 911-1088. //. 67-71. 1835. 



Goebel, K. Outlines of classification and special morphology. Ox- 

 ford. 1887. 



Henfrey, A, On the development of the spores and elaters of Mar- 

 chantia polymorpha. Trans. Linn. Soc. 21: 103-110. //. u- 



Hofmeister, W. On the germination, development, and fructification 

 of the higher Cryptogamia and on the fructification of the Coniferae. 



London. 1862. [Trans.] 



Ikeno, S. 



Bot. Centralb. 15: 65-88. 1903 



Marchantia polymorpha. Beih. 



Kienitz-Gerloff , F. Vergleichende Untersuchungen iiber die Entwicke- 

 lungsgeschichte des Lebermoos-Sporogoniums. Bot. Zcit. 32: 

 161-172. pi. 3. 1874. 



Kny, L. Bau und Entwickelung von Marchantia polymorpha. Son- 



derabd. a. d 



Wandtaf. 1890. 



Leitgeb, H. Untersuchungen iiber die Lebermoose. VI. Die Mar- 



chantieen. 188 1. 



MirbeL M 



Mar- 



chantia polymorpha. Menu Acad. Roy. Sc. Inst. France 13 : 337' 

 436. //. /-/a 1835. 



Strasburger, E. Die Geschlechtsorgane und die Befruchtung bei 



Marchantia _ 

 28. 1869. 



Department of Botany, 



Jahrb 



Cornell University, Ithaca, New York. 





