sb. pl. Bot. [mod.L. f. Gr. ἀμφί about, around + γαστρ- (γαστήρ) the belly.] Scale-like leaves, resembling stipules, developed on the under side of some Liverworts.
1842. Penny Cycl., XXIV. 278. Stipulæ or amphigastria.
1857. Berkeley, Cryptog. Bot., § 489. There are ventral leaves, called amphigastra.
1875. Bennet & Dyer, Sachs Bot., 306. Three rows of leaves, one being developed on the under or shaded side, hence termed Amphigastria.