THE CLUB-—MOSSES 545 
Fic. 373.—Mountain Selaginella (Selaginella helvetaci, Selaginella Family, 
Selaginellacee). A, sporophyte, }. B, young sporophyte growing 
from macrospore. (Bischoff.)—Native home, Eurasian mountains. 
Fic. 374.—Mountain Selaginella. Part of cone, showing a macrosporan- 
gium (a) containing three macrospores, and a microsporangium (b) 
discharging numerous microspores, 42. (Schenck.) 
. 
Another large group is Selaginella (Fig. 373) the sporo- 
phytes of which often resemble those of the club-mosses so 
closely that they were at first included in the same genus, 
and many forms in cultivation are still called by florists, 
lycopodiums. A most significant though inconspicuous 
difference is that Selaginella has two kinds of spores—minute 
ones, called microspores,! which are very numerous in anther- 
like saes termed microsporangia (b, Fig. 374); and macro- 
spores 2 (a) which are so large that four fill a macrosporangium. 
Both kinds of sporangia are borne singly on the stem just 
above or in the axils of upper leaves, in the same branch or 
cone. 
1 Mi’cro-spore < Gr: mikros, small. 
2 Mac’ro-spore < Gr. makros, large. 
