En´dive. See Chicory.

Endless Screw, a mechanical contrivance, consisting of a screw the thread of which gears into a wheel with skew teeth, the obliquity corresponding to the angle of pitch of the screw. It is generally employed as a means of producing slow motion in the adjustments of machines, rather than as transmitter of any great amount of power.

Endlicher (end´li-hėr), Stephen Ladislaus, Hungarian botanist, born at Presburg in 1804. He was successively court-librarian at Vienna, and keeper of the natural history museum; and in 1840 was appointed professor of botany in the University of Vienna, and director of the botanic garden, which he immediately began to reorganize. He took part on the popular side in the German revolution of 1848, and died by his own hand in 1849. Among his chief botanical works are his Genera Plantarum, a systematic treatise on botany; and his Enchiridion Botanicum, or Manual of Botany.

Endocardi´tis, is inflammation of the endocardium, which is the lining membrane of the internal surface of the heart.

Endodermis, the innermost layer of the cortex. It acts as a 'physiological barrier' between the vascular tissues and the cortex, its structure being such as to compel all interchange of water and other materials between the two to pass through the living protoplasm of the endodermal cells. Sec Tissues of Plants.

Endog´amy (Gr. endon, within, gamos, marriage), a custom among some savage peoples of marrying only within their own tribe: opposite to exogamy.

Endogenous Plants, old name for monocotyledons (q.v.).

Endogenous Structures, in botany, are those which arise in the interior of the parent organ. Lateral roots furnish the best example. Opposed to exogenous structures (see also Branching and Root).

En´domorph, a term applied to crystals of minerals enclosed in those of other minerals.

En´doparasite (Gr. endon, within), a parasite living within, and at the expense of, another organism, as opposed to an ectoparasite, which attacks its host from the exterior.