GLOSSARY 



[The definitions of a glossary are often unsatisfactory. It is much better to con- 

 sult the fuller explanations of the text by means of the index. The following glos- 

 sary includes only frequently recurring technical terms. Those which are found only 

 in reasonably close association with their explanation are omitted.] 



Akene : a one-seeded fruit which ripens dry and seed-like. 



Alternation of generations: the alternation of gametophyte and 

 sporophyte in a life history. 



Anemophilous : applied to flowers or plants which use the wind as agent 

 of pollination. 



Anther: the sporangium-bearing part of a stamen. 



Antheridium : the male organ, producing sperms. 



Apetalous : applied to a flower with no petals. 



Apocarpous: applied to a flower whose carpels are free from one an- 

 other. 



Archegonium: the female, egg-producing organ of Bryophytes, Pteri- 



dophytes. and Gymnosperms. 

 AscocARP : a special case containing asci. 

 Ascospore : a^spore formed within an ascus. 



Ascus: a delicate sac (mother-cell) within which ascospores develop. 

 Asexual spore : one produced usually by cell-division, at least not by 



cell-union. 



Calyx : the outer set of floral leaves. 



Capsule: in Bryophytes the spore-vessel ; in Angiosperms a dry fruit 



which opens to discharge its seeds. 

 Carpel : the megasporophyll of Spermatophytes. 

 Chlorophyll : the green coloring matter of plants. 

 Chloroplast : the protoplasmic body within the cell which is stained 



green by chlorophyll. 

 Conjugation : the union of similar gametes. 

 Corolla : the inner set of floral leaves. 



