Ill 



MARCHANTIE^ 



opposite sides of the spore, and through each of these a filament 

 protrudes, one thicker and contaiiiing chlorophyll, the other 

 more slender and nearly colourless. The first is the germ tube, 



A^ 



i^'. 



sp 



Fig. 25. — Targio-nia kypopkylia{'L.). Germination of the spores, X about 200. In B two germ tubes 

 have been formed ; C and E are optical sections ; x, apical cell ; r, primary rhizoid ; sp, spore 

 membrane. 



the second the first rhizoid. In Fiinbriaria Calif ornica the 

 first root-hair does not usually form until a later period. In 

 Targionia a curious modification 

 of the ordinary process is quite 

 often met with (Fig. 25, B). Here, 

 by a vertical division in the very 

 young germ tube, it is divided into 

 two similar cells, which both grow 

 out into germ tubes. Whether 

 both of these ever produce perfect 

 plants was not determined, but the 

 first divisions in both were per- 

 fectly normal. The first divisions 

 in the germ tube are not quite 



.. . r) ••;•,( U 4- ^'^' ^^- — Targionia hypophylla (L.). Germ 



so uniform as m Kiccia kirta, but p,^„t ;„ ,,,hich the thaiius (T) has been 

 resemble them very closely in the formed secondarily, X260. 

 commoner forms. 



In Fimbriaria especially, and this has also been observed in 



