GLOSSARY 



Adventive. A term applied to roots, buds, or branches borne in any 



other than the usual place. 

 Alga. A comparatively simple plant (simpler than a moss or liverwort) 



which contains chlorophyl. 

 Alternate leaves. Those of which only one is borne at a particular 



node on a stem or branch ; the leaves at two successive nodes are 



on different sides. 



Annual. A plant which completes its entire life cycle in a single season. 

 Anther. The head, or upper part, of a stamen, in which the pollen 



grains are borne. 

 Antherid. The organ of a moss, liverwort, or higher plant in which 



male gametes are produced. 

 Antherozoid. A motile male gamete. 

 Archegone. The egg-producing organ of a moss, liverwort, or higher 



plant. 

 Axil. The upper angle between a leaf and the stem or branch on which 



it is borne. 

 Axillary. Borne in, or growing from, an axil ; as axillary buds, or 



axillary flowers. 



Bark. The dry portion of a stem or root lying outside the cork cam- 

 bium. The tissues between the cork cambium and the cambium 

 proper are sometimes called green bark, to distinguish them from 

 the true or dry bark. 



Basal. Referring to that part of a structure or organ nearest its base 

 or point of attachment. 



Basidium. A large cell bdrne on the surface of one of the gills of a 

 mushroom, or on the corresponding surface of any of the related 

 fungi, at whose end the spores are produced. 



Bast. The part of a vascular bundle through which manufactured 

 food is conducted ; also called the phloem. 



Biennial. A plant which requires two years in which to complete its 

 life cycle, usually storing food the first year and bearing flowers 

 and fruit the second. 



Bract. A small leaf from whose axil a flower grows. 



Bulb. A short shoot covered with thick, fleshy leaves, as in the onion or 

 lily. 



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