#plant science

• Agametangia — A rare plural or adjectival form used in botany to denote asexual organs or cellular structures inside which agametes (spores or zoospores) are formed in lower plants, fungi, or algae. The term describes the non-sexual reproductive apparatus before modern morphological standardization.
• Green alder — Specific epithet and taxonomic designation used in botany to identify the green alder (Alnus alnobetula), a highly resilient mountain and subalpine shrub with flexible, branched stems. This biological entity serves as an ecological indicator for cold regions, gravelly riverbeds, and steep slopes exposed to avalanches, possessing a unique capacity for nitrogen fixation through bacterial symbiosis.
• Amaranthus paniculatus — A historical taxonomic designation or botanical synonym used in plant nomenclature for the species Amaranthus cruentus (commonly known as red amaranth or blood amaranth), an annual herbaceous plant remarkable for its dense, erect panicle-shaped inflorescences. It is globally cultivated as an ornamental plant and as a high-protein pseudocereal.
• Amaryllidaceous (archaic) — A rare adjective form or old lexical variant historically used in some natural history treatises with the meaning of amaryllidaceous, pertaining to the Amaryllis genus or related plants. Structurally, it defines the morphological traits specific to these ornamental monocotyledonous species.
• Amentiferous — The feminine singular form of the adjective 'amentifer'; describes a plant, a botanical family, or an inflorescence that bears catkins (aments). It is used in plant taxonomy and ecology to qualify woody species whose male or female flowers are grouped in a flexible axis adapted for wind pollination.
• Astilboides — A genus of herbaceous perennial plants in the Saxifragaceae family, natively represented by the species Astilboides tabularis, indigenous to China and Korea. The plant is distinguished by the impressive size of its massive, peltate, circular, and lobed leaves, which resemble umbrellas, and its terminal panicles of small, white flowers that visually recall the genus Astilbe.