256 BOTANICAL GAZETTE {APRIL 
phytes, are not continuous, but only occasional in occurrence. 
There is nothing that would hinder the fertilization of several or all 
of the archegonia which open on any occasion when fertilization 
takes place. A competition for food, together with a difference 
in the growth vigor of the embryos, probably determines which 
of several zygotes shall become the successful sporophyte. Some 
of the unsuccessful embryos doubtless abort and collapse in very 
Fic. 10 Fic. 12 
Fics. 7~-12.—Fig. 7, gamet ophyte g givi H h (€1,€2,€3) 
of whee ES annotinum,X3; figs. 8, 5 Seon ee of Lycopodium damien: 
each with fou neyo (a, lay &35 after BRUCHMANN (3); fig. 10, section of 
gametophyt neighboring embryos, X150; fig. 11, gameto- 
phyte ee ponoebing dilnbile space ids sidan x5; fig. 12, same with two 
very young sporophytes emerging, <8; figs. ro and 11 after Hortoway (23, 24)3 
fig. 12 after CHAMBERLAIN (10). 
early stages, soon becoming unrecognizable; while according to 
BRUCHMANN’S accounts, confirmed by subsequent observers, many 
of them remain in an arrested but viable condition for some time. 
These may doubtless be added to by subsequent fertilization of 
still other archegonia. It appears that among some Lycopodium 
species with large gametophytes several full fledged sporophytes 
may be produced. 
