_Angiospermæ_, _Angiospermous_, with seeds formed in an ovary or pericarp, 109. _Angular divergence_ of leaves, 69. _Anisos_, unequal. _Anisomerous_, parts unequal in number. _Anisopetalous_, with unequal petals. _Anisophyllous_, the leaves unequal in the pairs. _Annual_ (plant), flowering and fruiting the year it is raised from the seed, and then dying, 37. _Annular_, in the form of a ring, or forming a circle. _Annulate_, marked by rings; or furnished with an _Annulus_, or ring, like that of the spore-case of most Ferns. In Mosses it is a ring of cells placed between the mouth of the spore-case and the lid in many species. _Annotinous_, yearly, or in yearly growths. _Anterior_, in the blossom, is the part next the bract, i. e. external; while the posterior side is that next the axis of inflorescence. Thus, in the Pea, &c., the keel is _anterior_, and the standard _posterior_, 96. _Anthela_, an open paniculate cyme. _Anther_, the essential part of the stamen, which contains the pollen, 14, 80, 101. _Antheridium_ (plural _antheridia_), the organ in Cryptogams which answers to the anther of Flowering Plants, 150. _Antheriferous_, anther-bearing. _Anthesis_, the period or the act of the expansion of a flower. _Anthocarpus_ (fruits), 118. _Anthophore_, a stipe between calyx and corolla, 113. _Anthos_, Greek for flower; in composition, _Monanthous_, one-flowered, &c. _Anticous_, same as anterior. _Antrorse_, directed upwards or forwards. _Apetalous_, destitute of petals, 86. _Aphyllous_, leafless. _Apical_, belonging to the apex or point. _Apiculate_, pointleted; tipped with a small point. _Apocarpous_ (pistils), when the several pistils of the same flower are separate. _Apophysis_, any irregular swelling; the enlargement at the base of the spore-case of the Umbrella-Moss. _Apothecium_, the fructification of Lichens, 171. _Appendage_, any superadded part. _Appendiculate_, provided with appendages. _Appressed_, close pressed to the stem, &c. _Apricus_, growing in dry and sunny places. _Apterous_, wingless. _Aquatic_ (_Aquatilis_), living or growing in water; applied to plants whether growing under water, or with all but the base raised out of it. _Arachnoid_, _Araneose_, cobwebby; clothed with, or consisting of, soft downy fibres. _Arboreous_, _Arborescent_, tree-like, in size or form, 39. _Arboretum_, a collection of trees. _Archegonium_ (plural _archegonia_), the organ in Mosses, &c., which is analogous to the pistil of Flowering Plants. _Arcuate_, bent or curved like a bow. _Arenose_ (_Arenarius_), growing in sand. _Areolate_, marked out into little spaces or _areolæ_. _Argenteous_, or _Argentate_, silvery-like. _Argillose_, growing in clay. _Argos_, Greek for pure white; _Argophyllous_ or _Argyrophyllous_, white-leaved, &c. _Argutus_, acutely dentate. _Arillate_ (seeds) furnished with an aril. _Arilliform_, aril-like. _Arillus_, or _Aril_, a fleshy growth from base of a seed, 126.