EXOGENOUS

adj. E2x-o2j'e2n-u3s. Lat., exogen us. Fr., exogene. Lit., outward-growing (said of most dicotyledons, the stems of which increase from within outward). The term is not now distinctive of dicotyledons, as some monocotyledons and some acotyledons are also exogenous, and some dicotyledons endogenous. The Exogence are: 1. Of De Candolle (1818), a primary division of vascular plants, and synonymous with dicotyledons, comprising the ThalamaAorece, Calicijloreop., Corolliflorece, and MonochlamydiecR; or of Lmdley (1830), a subcla of vascular plants comprising the tribes Angiospermce and Gymnospermce, and in 1833 the subcla es Polypetalce, Tricompletce, and Monopetalce, and in 1847 the subcla es of the Diclince, Hypogynce, Perigynce, and Epigynce. 2. Of Link, a cla consisting of the subcla es Vagina les, Vag in antes, Perigon a toe Xeranthce, Hypanthce Epanthcu, Anthodiatce Perigynce, Leguminosce Cat a stem ones, An a stem ones Allostemones, Apetaloe Hydrophytce, Catadytce, and Amentacece. 3. Of Wood, the first province of the subkingdom Phcenogamia (flowery plants), and divided into the Angiospermce and Gymnospermce, the Angiospermce being subdivided into Dialypetalce (Polypetalce), Gamopetalce (Monopetalce), and Apetalce (Monochlamydiece); the Gymnospermce having the single division Conoidece. [B, 1, 34, 77 (a, 24).] [s. 785]