#reproductive structure

• Adelphogamic — A term describing an organism, plant, or biological structure that reproduces through fertilization between closely related individuals or through the fusion of sexual cells originating from the same strain or sister strains. As a noun, it represents any plant specimen that exhibits this particular type of reproductive isolation and restricted genetic compatibility.
• Akinetospore — An asexual, unicellular reproductive spore completely lacking flagella or cilia and consequently non-motile (immobile), characteristic of certain species of green algae, red algae, or lower fungi; unlike zoospores, it cannot move autonomously in the aquatic environment, being passively dispersed by water currents or wind. This biological structure is protected by a well-developed, rigid cell wall that allows it to survive unfavorable ecological conditions (such as temporary drought or temperature drops) until the environment becomes optimal for germination.
• Amphigamous — Relating to amphigamy or presenting the characteristics of this state; describes cryptogamous plants (such as mosses or ferns) whose reproductive organs or fertilization modes are not obvious or structured in the form of visible flowers, reproduction being based on the alternation of generations and the hybrid fusion of hidden gametes.
• Androphore — An elongation of the floral axis (receptacle) in the form of a support, column, or slender stalk that structurally supports the androecium (stamens) above the insertion level of the perianth (calyx and corolla). This structural anatomical element optimizes the spatial exposure of the anthers, facilitating a more efficient pollen dispersal.
• Androstyle — A specialized anatomical structure or columnar axis resulting from the fusion or rigid transformation of stamen filaments, serving as a structural support for the flower's anthers. This rare morphological element optimizes the spatial positioning of the male reproductive apparatus within the corolla.
• Anisogametangium — A sexually differentiated reproductive organ or structure within which unequal gametes are formed or whose cellular content participates directly in a process of anisogametangiogamy. This structural element, found in certain species of algae and fungi, presents a clear volumetric or morphological asymmetry compared to the complementary organ of the opposite sex, existing either as a male microgametangium or a female macrogametangium.
• Aplanosporangium — A specialized asexual reproductive organ (sporangium) within which exclusively aplanospores (non-motile spores, lacking a flagellar apparatus) differentiate and develop. This cellular structure ensures the protection and full maturation of the non-motile spores before the outer wall opens to release them into the environment.