(XV) 



GLOSSARY. 



Abaxial, of appendages. — That portion of them which is on 



the side farthest from the main axis. 

 Abortion. — A state of imperfect development. 

 Acicular. — Needle-shaped. 



Adaxial, of appendages. — That portion of them which is on 



the side nearest the main axis. 

 Adnation. — Union of organs of different nature, or of organs 



of the same nature but of different grades. 

 Adventitious (adventive). — Arising out of the normal place 



and time. 



Alveolar. — Relating to the honey-comb-like, superior hyme- 

 nium of Morchella and similar forms. 



Anaphyte. — A segmented leafy shoot, built up by a succession 

 of individuals or phytons, each of which consists of leaf- 

 blade and leaf-base. 



Androgynous. — Bearing both kinds of sexual organs in different 

 parts of the same inflorescence. 



Anther idiophore. — A differentiated branch of the thallus 

 which bears antheridia. 



Antheridium. — Male sexual organ of Gymnosperms and 

 Cryptogams. 



Antherozoid (— spermatozoid). — The motile male fertilizing 

 body. 



Antithetic. — The type of alternation of generations in which 

 the sporophyte is intercalated and inaugurates a method 

 of growth, tissue- and organ -formation, different from 

 those of the gametophyte ; a discontinuous type of 

 generation-succession. 



Apogamy. — The formation of the sporophyte, or parts of it, 

 directly from the vegetative tissues of the sexual plant, 

 the sexual organs being eliminated from the life-cycle. 



Apogeotropic. — Relating to axial organs which grow vertically 

 upward. 



Apophysis. — The outgrowth on the adaxial surface of the 

 ovuliferous or other scales in the Abietineae ; the basal 

 swollen portion of the capsule of mosses. 



Apospory. — The formation of the sexual plant directly from 

 the sporangium or vegetative tissues of the sporophyte, 

 spore-formation being eliminated from the life-cycle. 



