GLOSSARY 



Albuminous. Containing a nutritive tissue (endosperm) when 



ripe; used of seeds. 

 Algae. Seaweeds or fresh-water weeds, containing chlorophyll 



and reproduced by spores. 

 Antheridium. The organ in which the male cells are produced 



in Spore-plants. 

 Archegonium. The organ in which the female cell is produced 



in the higher Spore-plants and in Gymnosperms. 

 Bacteria.. Minute unicellular plants, the chief agents in disease 



and decay. 

 Bast. The tissue which serves to convey the food-substances 



formed in the leaf. 



Calyx. The outermost set of leaves in a flower; usually green. 

 Cambium. The tissue from which new wood and bast are 



formed in secondary growth. 



Carpel. A fertile leaf which bears or encloses the young seeds. 

 Cilia. Threads of protoplasm by means of which active male 



cells and spores move. 

 Corolla. The set of leaves in a flower next within the calyx; 



usually of a bright colour. 

 Cotyledon. A seed-leaf; the first leaf, or one of the first two 



leaves produced by the embryo. 



Cryptogam. A plant reproduced by spores, not by seeds. 

 Egg-cell. The female cell which, when fertilised, produces 



the embryo. 



Embryo. The young plant produced from the fertilised egg- 

 cell. 

 Embryo-sac. That cell of the ovule in which the egg-cell and 



endosperm are formed; the megaspore. 

 Endosperm. A tissue formed in the embryo-sac to feed the 



embryo. 

 Epiphyte. A plant which grows on another plant without 



feeding upon it; like moss on trees. 

 Exalbuminous. Containing little or no endosperm when ripe; 



used of seeds. 

 Fertilisation. The union of the male cell with the female or 



egg-cell. 



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