#leaf morphology
- Acrodromous — Regarding leaves or venation patterns; exhibiting acrodromy, where two or more primary or secondary veins originate from the leaf base and run convergently toward the apex, joining at the tip.
- Alchemilla — A genus of perennial herbaceous plants in the Rosaceae family, primarily distributed throughout temperate and arctic regions of Europe and Asia, popularly known as lady's mantle. These plants are characterized by lobed leaves, often folded like a fan, which retain dew droplets through guttation, and tiny, greenish or yellowish flowers, being widely utilized in traditional medicine due to their astringent and anti-inflammatory properties.
- Ambrosiifolia — A specific epithet used in binary botanical nomenclature to describe a plant species whose leaves exhibit a shape, segmentation, or texture similar to those of plants in the genus Ambrosia. The term originates from the combination of the genus name 'Ambrosia' with the Latin noun 'folium' (leaf), structurally assigned to various species to highlight their foliar morphological characteristics.
- Amplexicaul — Regarding leaves or other plant organs: embracing, surrounding, or clasping the plant stem with its widened base or through two lobules located at the point of insertion. This anatomical feature is essential in taxonomy for the exact identification of certain botanical families, while providing enhanced structural stability to the leaf against harsh weather.
- Amplexifolia — A specific epithet used in binomial botanical nomenclature (Latin) to describe a plant whose leaves completely embrace or surround the stem with their base. It is the feminine form of the Latin adjective 'amplexifolius', frequently encountered in official scientific species names to indicate a defining amplexicaul leaf trait.
- Amplexifoliate — Regarding plants or vegetable formations: having amplexicaul leaves whose bases embrace, surround, or tightly clasp the stem. This structural descriptive term is utilized in advanced plant morphology to define the state of a shoot or stem entirely covered by foliage adapted to wrap circularly around the central axis, offering optimal insulation to growth nodes.