_Drupe_, a stone-fruit, 120. _Drupelet_ or _Drupel_, a little drupe. _Ducts_, the so-called vessels of plants, 134. _Dumose_, bushy, or relating to bushes. _Duramen_, the heart-wood, 142. _Dwarf_, remarkably low in stature. _E-_, as a prefix of Latin compound words, means destitute of; as _ecostate_, without a rib or midrib; _exalbuminous_, without albumen, &c. _Eared_, see _auriculate_, 53. _Ebracteate_, destitute of bracts. _Ebracteolate_, destitute of bractlets. _Eburneous_, ivory-white. _Echinate_, armed with prickles (like a hedgehog). _Echinulate_, a diminutive of it. _Edentate_, toothless. _Effete_, past bearing, &c.; said of anthers which have discharged their pollen. _Effuse_, very loosely branched and spreading. _Eglandulose_, destitute of glands. _Elaters_, threads mixed with the spores of Liverworts, 165. _Ellipsoidal_, approaching an elliptical figure. _Elliptical_, oval or oblong, with the ends regularly rounded, 52. _Emarginate_, notched at the summit, 54. _Embryo_, the rudimentary plantlet in a seed, 11, 127. _Embryonal_, belonging or relating to the embryo. _Embryo-sac_, 117. _Emersed_, raised out of water. _Endecagynous_, with eleven pistils or styles. _Endecandrous_, with eleven stamens. _Endemic_, peculiar to the country geographically. _Endocarp_, the inner layer of a pericarp or fruit, 120. _Endochrome_, the coloring matter of Algæ and the like. _Endogenous Stems_, 138. _Endogenous plants_, an old name for monocotyledons. _Endopleura_, inner seed-coat. _Endorhizal_, radicle or root sheathed in germination. _Endosperm_, the albumen of a seed, 21. _Endostome_, the orifice in the inner coat of an ovule. _Ennea-_, nine. _Enneagynous_, with nine petals or styles. _Enneandrous_, nine-stamened. _Ensate_, _Ensiform_, sword-shaped. _Entire_, the margins not at all toothed, notched, or divided, but even, 55. _Entomophilous_, said of flowers frequented and fertilized by insects, 113. _Ephemeral_, lasting for a day or less, as the corolla of Purslane, &c. _Epi-_, Greek for upon. _Epicalyx_, such an involucel as that of Malvaceæ. _Epicarp_, the outermost layer of a fruit, 120. _Epidermal_, relating to the _Epidermis_, or skin of a plant, 50, 141, 143. _Epigæous_, growing on the earth, or close to the ground. _Epigynous_, upon the ovary, 95, 99. _Epipetalous_, borne on the petals or the corolla, 99. _Epiphyllous_, borne on a leaf. _Epiphyte_, a plant growing on another plant, but not nourished by it, 36. _Epiphytic_ or _Epiphytal_, relating to _Epiphytes_. _Epipterous_, winged at top. _Episperm_, the skin or coat of a seed, especially the outer coat. _Equal_, alike in number or length. _Equally pinnate_, same as abruptly pinnate, 57. _Equitant_ (riding straddle), 60. _Erion_, Greek for wool. _Erianthous_, woolly-flowered. _Eriophorous_, wool-bearing, &c. _Erose_, eroded, as if gnawed. _Erostrate_, not beaked. _Erythros_, Greek for red. _Erythrocarpous_, red-fruited, &c.