1-2 



MORPHOLOGY OF ANGIOSPBEMS 



of gametophytic tissue— namely, the reduced number of chromo- 

 somes (Fig. 53). With this division, therefore, the history of 

 the male gametophyte begins. This line of demarcation be- 

 tween sporophyte and gametophyte is easy to define, but does 



Fig. 15. — Forms of stamens. 1, Calandrinia compressa ; 2, Solatium Ly coper Hcum; 3, 

 Galanthus nivalis; 4, Cyclamen europaeum; 5, Ramondia pyrenaica; 6, 7, Cassia 

 lenitiva; 8, Pyrola rotundifolia ; 9, Arctostaphylos Uva-ursi; 10, A. alpina; 11, 

 Vaccinium uliginosum; 12, Pyrola unijiora; IS, Medinilla (after Baillon) ; 14i 

 Vaccinium Oxycoccus; 15, Calceolaria Pavonii; 16, Tozzia alpina\ 17, IS, Sihbaldia 

 procumbens; 19, Oaleopsls angustifolia; 20, 21, Erythraea Centaureum; 22, 23, Me- 

 lissa officinalis; 24, 25, Calla -palustris; 26, Nyctandra (after Bailxon) ; 27, 28, 

 Globularia cordifolia; 29, SO, Theobroma Cacao; 31, Pinguicula vulgaris; 82, 

 Garcinia. — From Kernels Pflanzenleben, 



not result in so simple a conception of the alternating genera- 

 tions as to begin the gametophyte with the germinating spore, 

 for it involves the simultaneous origin of four gametophytic 

 generations from the mother-cell through an intermediate divi- 

 sion. The claim that the reduction division must be regarded 



