Glossary - Botanical,E
- E-: prefix usually meaning without
- Ebeneous: black
- Eccentric: off-center, not positioned directly on the central axis
- Echinate: prickly
- Ecotone: transition zone between two adjoining communities
- Ecotype: those individuals adapted to a specific environment or set of conditions
- Elliptic: broadest near the middle and tapering gradually to both ends
- Elongate: stretched out, many times longer than broad
- Emarginate: with a shallow notch at the apex
- Endemic: confined to a limited geographic area
- Endocarp: the inner layer of the pericarp, which is the wall of the ripened ovary or fruit (compare mesocarp, exocarp)
- Ensiform: sword-shaped, as applied to a leaf
- Entire: describing a leaf that has a continuous, unbroken margin with no teeth or lobes
- Entomophilous: insect-pollinated
- Ephemeral: describes a plant or flower that lasts for only a short time or blooms only occasionaly when conditions are right
- Epigynous: with stamens, pistils, and sepals attached to the top of the ovary (compare hypogynous)
- Erose: having an irregular margin as if it has been gnawed
- Escapee: a plant that has escaped from cultivation and now reproduces on its own
- Evanescent: fleeting, lasting for only a short time
- Even-pinnate: a pinnately-compound leaf ending in a pair of leaflets (compare odd-pinnate)
- Exfoliating: peeling off in thin layers or flakes
- Exocarp: the outer layer of the pericarp of a fruit (compare endocarp, mesocarp)
- Exotic: not native, introduced from another area
- Exserted: projected from or extending beyond, as stamens from a flower
- Extant: still surviving, not completely extinct
- Extirpated: destroyed or no longer surviving in the area being referred to, but may survive outside of that area
- Extrorse: turned or opening outward away from the axis (compare introrse)
- Exudate: a substance exuded or secreted from a plant