GLOSSARY* 



Abstriction (act of unbinding). Partial or complete separation 

 by contraction. 



Achlorous (without green). Devoid of chlorophyll. 



Alternation of generations. The alternation of gametophyte 

 and sporophyte. Each produces a spore that upon ger- 

 mination produces the other generation, thus completing 

 the life- cycle. 



Anatropous (turned up). Said of an inverted ovule or seed 

 which has the raphe extending its whole length. 



Androecium (male household). The stamens of a flower col- 

 lectively; the name was applied at a time when it was 

 supposed that stamens were male sex-organs. 



Anemophilous (wind-loving). Applied to plants that use the 

 wind as a means of pollination. 



Annulus (a ring). The elastic ring of cells around the sporan- 

 gium in ferns. 



Anther (flowery). The pollen-bearing part of the stamen. 



Antheridium, pi. antheridia (anther form). The male sex- 

 organ of the lower groups of plants. 



Antherozoids. See Sperm. 



Antipodal (against the foot). Said of a group of cells at the 

 end of the embryo-sac farthest from the micropyle. 



Apetalous (without petals). Applied to flowers that are 

 devoid of specialized floral leaves. 



Apical. At the apex or tip. 



Apocarpous (without carpels) . Applied to flowers in which the 

 carpels are entirely free from one another. 



Apophysis (an offshoot). In mosses, an enlargement of the 

 pedicel at the base of the capsule. 



* In connection with most of the terms included in the glossary there are given in 

 parenthesis suggestions as to the original meaning of terms. In many cases such 

 insertions help materially in understanding the terms as they are used in botany. 



173 



