312 APPENDIX I 



differing in the relative lengths of the stamens and styles 



— e.g.. Primula, Lythrum (p. 68). 

 Disc-florets, the flowers occurring in the central portion of the 



capitulum of the Compositae ; cf. Ray Florets. 

 Drupe, a fleshy, indehiscent fruit, containing one or more seeds. 



The outer fruit-coat is fleshy or pulpy, the inner is hard 



and stony — e.g., a Cherry and a Peach (pp. 231-2). 

 Ebracteate, without bracts (q.v.). 

 Ecology, or CEjCology, the study of plant life in relation to its 



environment. 

 Emergence, an outgrowth from the surface tissues of a plant 



organ, such as a prickle on a rose stem. 

 Endosperm, the store of food material laid up in certain seeds 



outside the embryo. The embryo absorbs it during its 



germination — e.g., the horny part of a grain of maize. 

 Entire, apphed to leaves the margins of which are not 



toothed. 

 Entomophilous, a term applied to flowers which are cross- 



poUinated by the agency of insects ; cf. Anemophilous. 

 Epicalyx, the outer series of a double calyx — e.g., in Potentilla, 



Dryas, Fragaria (pp. 128, 158). 

 Epigynous, applied to flowers in which the calyx tube 



completely encloses the ovary, and the corolla and stamens 



appear to be placed on the top of the ovary. 

 Epipetalous, applied to stamens borne upon petals (p. 64). 

 Epiphyte, a plant which grows upon another plant, but is not 



a parasite (p. 291). 

 Etiolation, the condition of a plant which has been gro^vn in 



absence of sunlight. The stems are long and weak, the 



leaves small, and the colour is yeUowish-white instead of 



green. 

 Evergreen, a term applied to leaves which last for more than 



one season, and to plants bearing green foliage all the 



year (p. 25). 



