GLOSSARY' 



Actinomorphic (ray shaped). Having star-like or radiating symmetry. 



.aicidium. A fructification peculiar to certain rusts producing secidio- 

 spores, — a cluster cup. 



Alternation of generations. The alternation in a life history of a sexual 

 generation or gametophyte with an asexual generation or sporophyte. 



Anemophilous (wind loving). A term applied to plants which are pol- 

 linated by the wind. 



Angiosperms (vessel seed). Plants which have the seeds inclosed in an 

 ovary or seed case. 



Anther (flowering). The part of a stamen which bears pollen. 



Antheridiophore (antheridia bearer). In the liverworts a specialized 

 receptacle bearing antheridia. 



Antheridium. The male sexual organ producing sperms or antherozoids 

 in the groups below the seed plants ; also called an antherid. 



Antherozoid. See Sperm. 



Antipodal (against the foot). The term applied to three cells at the base 

 of the embryo sac. 



Apical. Pertaining to the apex or tip. 



Apical cell. A terminal cell which constitutes a growing point. 



Apogamy. The development of an egg without fertilization, or the devel- 

 opment of a sporophyte generation as a bud-like outgrowth from the 

 gametophyte. 



Apospory. The suppression of spore formation and the development of 

 a gametophyte generation directly from the sporophyte. 



Apothecium. In sac fungi, Ascomycetes (including lichens), the open 

 cup- or saucer-shaped fructification in which the sacs or asci lie ex- 

 posed in a membrane or hyraenium. 



Archegoniophore (archegonia bearer). In the liverwoi-ts a specialized 

 receptacle bearing archegonia. 



Archegonium (beginning of offspring). The many-celled female sexual 

 organ prodjjcing an egg, characteristic of the bryophytes, pterido- 

 phytes, and some gymnosperms. 



Archesporium (beginning of a spore). The cell or cells constituting the 

 tissue from which the spores of bryophytes and pteridophytes are 

 ultimately derived and also their homologues, the pollen grains. 



1 Most of the nouns in this glossary form their plurals by the addition of sores, 

 like ordinary English nouns. Those ending in us, unless otherwise stated, form 

 the plural in i, as nucleus, plu. nuclei. Those ending in ium form the plural in 

 ia, as antheridium, plu. antheridia. 



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