1722. The apple is an ovarium surrounded by a fleshy calyx. _CLASS XIII._ _Nut-plants--Apetalæ, Diclines._ 1723. Ovarium woody, and inclosing only one seed. Here belong the Apetalous and Diclinous Exogens. 1724. These plants repeat the fungi, grasses and Syngenesia, and have therefore imperfect corollæ, the calyx of which has alone remained, and usually closely surrounds the nut. 1725. The stalk is indeed usually woody; yet is still found to be also herbaceous and nodose with spathiform leaves. The leaves are simple, frequently needle-shaped or else arrested. The principal ingredients are starch, as in the Gramineæ and Syngenesia. 1726. The inflorescence is mostly amentaceous, as in the Agarics, Grasses and Syngenesia. 1727. They divide into androgynous and dioecious plants. 1728. First order, _Nucariæ parenchymatosæ_. Hermaphrodite herbs with nodes and spathose leaves, calyx green, superior, and quinquepartite with five opposite stamina; nut mostly triangular and utricular. 1729. Second order, _N. vaginatæ_. Form of vegetation pretty nearly as in preceding order, but the calyx is corolla-like, and the stamina mostly alternate--_Phytolacceæ_, _Illecebreæ_. 1730. Third order, _N. axonales_. Hermaphrodite, calyx corolla-like, superior and wholly quaternary; herbs and shrubs bearing nuts and plums--_Nyctagineæ_, _Daphneæ_, and _Santalaceæ_. 1731. Fourth order, _N. florales_. Trees, calyx corolla-like but inferior; capsules, plums and berries--_Proteaceæ_. 1732. Fifth order, _N. fructuariæ_. Diclines; herbs, shrubs and trees without corollæ, but with nuts or plums. (Their sixteen families stand in the order exhibited at Tab. B.) _CLASS XIV._ _Plum-plants--Papilionaceæ._ 1733. Polypetalous calycine corollæ, with a drupe or its fundamental form, the legumen. Here belong the papilionaceous plants, Rhamnaceæ and Terebinthaceæ. 1734. The stalk is frequently herbaceous with nodes; but mostly fruticose and arborescent. 1735. The leaves here attain their highest development, and are mostly pinnated, sometimes endowed with the power of independent motion. 1736. The corollæ are mostly irregular, quinary, arranged like pinnate leaves, with ten, rarely more, connate and free stamina. 1737. The ovarium is a single carpel, owing to the four others being arrested; it is usually compressed and bivalved, with few seeds; it is a legumen, frequently converted into a fleshy fruit. 1738. The Papilionaceæ are so rich in number that they include all the orders of the trunk, and even transcend or exceed its limits; their allied families are the Rhamnaceæ and Terebinthaceæ with fleshy fruits. 1739. First order, _Drupariæ parenchymatosæ_. Papilionaceæ with herbaceous, nodose stalk and pinnated leaves; corolla-petals and single stamen free; seed-lobes thin--Hedysareæ, _Astragaleæ_, _Glycineæ_.