460 APPENDIX 



{Numbers refer to paragraphs,) 



Distichous. Two-sided: generally used for branches or flower-clusters, upon 



which the leaves or flowers are in two opposite longitudinal rows, 67. 

 Distinct. Parts of the flower not joined to other parts in the same series or 



set. 167. 

 Domestication. The state or condition of being adapted or inured to cultiva- 

 tion, or the act of adapting or inuring to cultivation. 

 Dorsal. Back. 304. 



Drupe. A stone fruit: having a hard pit and a soft exterior. 300. 

 Drupelet. A very small drupe, especially one which is a part of a head or 



cluster of fruits. 297. 

 Ecology. The science or study which treats of the relationships of organisms 



to each other and to their environments. 524. 

 Elliptical. Applied to oblong leaves which gradually taper both ways from 



the middle. 131. 

 Emasculation. Removal of stamens or anthers. 285. 

 Embryo. The miniature plant in the seed. 406. 

 Embryology. The science which treats of the embryo: in botany, the study of 



the first or formative stages of any part, either in the seed or the bud. 

 Embryo-sac. A cell in the ovule in which the embryo is developed. 377, 377a. 

 Endemic. Peculiar to a nation, people, or isolated country. 

 Endocarp. The inner layer of a pericarp, especially the hard stone of a drupe. 



300. 

 Endogen. Old name for the plants now more generally called monocotyledons; 



name refers to the manner of lateral growth of the stem. 398. 

 Endosperm, Nutritive matter stored around the embryo in the seed. 410, 410a. 

 Entomophilous . Pollinated by insects. 273a. 

 Environment. The sum of the physical conditions in which an organism lives, 



often including, also, the condition of struggle for existence. 258c. 

 Epieotyl. Upper internode of the embryo, but not always present: first 



internode of the plumule. 409a. 

 Epigeal. Said of germination when the cotyledons rise into the air. 401. 

 Epigynous. Parts of the flower borne upon the ovary. 170. 

 Epiphyte. Plant growing upon another plant as a support, but not taking 



food from the support: air-plant. 517. 

 Equitant. Astride: said of conduplioate leaves of which the edges alternately 



overlap. 63ffl. 

 Eutropic. Sinistrorse. 510a. 

 Evolution, The hypothesis which supposes that the forms of life are mutable 



or changeable, and that one form may, upon occasion, pass into another 



form. 

 Excurrent, Indeterminate growth: applied to forms of trees in which the 



"leader" persists. Is. 



