4. Drupa, a Stone-fruit, has a fleshy coat, not separating into valves, containing a single hard and bony Nut, to which it is closely attached; as in the Peach, Plum, Cherry, &c.; see Engl. Bot. t. 706 and 1383. The Cocoa-nut is a Drupa with a less juicy coat.
Sometimes the Nut, though not separating into distinct valves, contains more than one cell, and consequently several seeds. Instances are found in Cornus, t. 249, Gærtner, t. 26, and Olea, the Olive, Fl. Græc. t. 3, though one cell of the latter is commonly abortive.
5. Pomum, an Apple, has a fleshy coat like the Drupa, but containing a Capsule with several seeds, as in common Apples and Pears; see Pyrus domestica, t. 350.
This is comprehended by Gærtner under the different kinds of Bacca, it being sometimes scarcely possible to draw the line between them; witness the Linnæan genus Sorbus.
6. Bacca, a Berry, is fleshy, without valves,
