GLOSSARY. 177 



Entomophilous (insect-loving). Applied to those plants that 



use insects as means of effecting pollination. 

 Epidermis (upon the skin). The outermost layer of special 



cells covering plant-surfaces. 

 Epigynous (upon the ovary). Applied to those flowers whose 



outer parts appear to arise from the top of the ovary. 

 Epiphragm (a covering or lid). In mosses, a membrane cover- 

 ing the orifice of the capsule. 

 Eusporangiate (well or strong vesseled) . Applied to those plants 



whose sporangia arise from two or more hypodermal cells. 

 Exogenous (produced outside). Originating from outer layers 



of tissue. 



Exospore (outside the spore). The outer layer of a spore- wall. 

 Extine (on the outside). The outer coat of a pollen-spore. 

 Fertilization. The act of union of the sperm and the egg. 

 Fiber. A long and slender, thick-walled cell. 

 Fibrous. Composed of fibers. 

 Fibro- vascular (fiber-vessels). Composed of fibers and vessels; 



fibro-vascular bundles are the strands which make up the 



framework of the higher plants. 

 Filament (a thread). The stalk of the stamen, supporting the 



anther; also the individxial threads of Algae or Fungi. 

 Fission (splitting). Cell-division that includes the wall of the 



old cell. 

 Flowering glume. In grasses, the bract which subtends each 



flower, sometimes called lower palet. 

 Foot. A part of the sporophyte specially set apart for the 



purpose of absorbing nourishment. 

 Frond (a leaf). A name given to the leaves of ferns. 

 Fundamental tissue. That outside the fibro-vascular bundles 



and inclosed by the epidermis, but not a part of either. 

 Funiculus (a slender rope). The stalk of an ovule or seed. 

 Gametangium (gamete vessel). The specialized organ for 



production of gametes. 



Gamete. A reproductive cell which ordinarily becomes func- 

 tional only upon union with another, through which 



union a sexual spore is formed. 

 Gemma, pi. gemma (a bud). In Bryophytes, many-celled 



bodies specialized for asexual propagation. 

 Generative cell. The cell within the male gametophyte (usually 



within the microspore-wall) which divides to form the 



two male cells. 



