#arbori

• Abronia — (Botany) A genus of herbaceous plants in the family Nyctaginaceae, native to western North America, commonly known as 'sand verbenas'; (zoology) a genus of arboreal alligator lizards in the family Anguidae, native to Central America and Mexico, many of which are endangered species.
• Acacia blossoms — A popular regional name attributed to the fragrant, drooping inflorescences of the black locust tree or flower clusters belonging to certain climbing plants; acacia blossoms. In old rural communities, the term was utilized in its plural form to describe the abundance of white flowers hanging gracefully from tree canopies, heavily gathered in spring for medicinal virtues or traditional jams.
• Acrotonous — Pertaining to acrotony; a plant, stem, or shrub characterized by the buds situated toward the apex (apical) developing much more strongly and rapidly than those at the base, structurally dominating branch growth. As a noun, the term describes a type of vegetative behavior where primary branching occurs exclusively within the upper zone of the central axis, representing an essential trait of many deciduous tree species.
• Sheltering — The act of sheltering and its result; an archaic or regional noun form historically used in place of the modern standard term 'adăpostire' (sheltering) or 'găzduire' (hosting). It designates the process of providing protection, refuge, hiding, or safe placement for persons, material assets, or animals to shield them from dangers, excessive taxes, or harsh weather.
• Tree-blazing — A regional or archaic form encountered in certain local dialects for the act of tree-blazing, meaning the structural marking of forest trees by incising the bark with a special tool to indicate boundaries, property ownership, or trees designated for harvesting. This term reflects traditional forestry marking techniques and territorial organization used in the past by rural communities in mountainous regions.
• Tree-blazing process — The act of blazing trees and its result; a regional form for the process of tree-blazing or physically, structurally marking trees by partially incising the trunk's outer bark. This customary activity served as an archaic method of forest surveying, providing durable visual landmarks for orientation and territorial boundary establishment in rural communities.
• Aesculus — A genus of woody plants, deciduous trees, and shrubs belonging to the Sapindaceae family (formerly Hippocastanaceae), distributed throughout the temperate regions of the Northern Hemisphere. These species are structurally characterized by palmate-compound leaves, large erect thyrsus-like inflorescences, and globose, often spiny capsular fruits containing large seeds popularly known as chestnuts.
• Agathis — A genus of large, evergreen coniferous trees in the family Araucariaceae, distributed across the Southern Hemisphere, particularly in the tropical and subtropical regions of Southeast Asia and Oceania. These trees are characterized by massive, cylindrical trunks, smooth bark, and unusually broad leaves for conifers, holding major ecological importance and being highly valued for their production of natural resins and durable timber.
• Agathis robusta — A species of giant conifer within the genus Agathis, family Araucariaceae, commonly known as the Queensland kauri. This tree is endemic to the tropical and subtropical rainforests of eastern Australia and Papua New Guinea, distinguished by its perfectly straight trunk, devoid of lower branches, and a dense canopy, holding immense ecological value in biodiversity conservation and major historical importance in the high-quality timber industry.
• Evergreen — A specialized term used to describe plants, trees, or shrubs that possess the structural biological property of keeping their green leaves persistently throughout the entire year. This vegetative phenomenon defines species perfectly adapted to variable climatic environments, which do not undergo a complete defoliation phase during cold or dry seasons, maintaining active photosynthesis and providing constant ecological support to the ecosystem.
• Alangium — A genus of flowering plants in the family Cornaceae (or Alangiaceae in alternative higher classifications), comprising species of small to medium-sized trees and shrubs native to tropical and subtropical regions across Asia, Africa, and Australia. These plants exhibit a unique structural feature of long, recurved petals and are historically recognized in traditional Chinese and Ayurvedic medicine for the complex alkaloids contained within their roots and bark, used empirically to treat rheumatic and dermatological disorders.
• Persian silk tree — A species of exotic ornamental tree in the legume family, native to Central and Eastern Asia, commonly known as the 'Persian silk tree'; it is characterized by a fan-shaped canopy, bipinnate leaves that fold closed at night, and spectacular globular inflorescences composed of long, silky, vibrant pink stamens.
• Alder — Taxonomic genus of deciduous trees and shrubs in the Betulaceae family, commonly known as alders. Characterized by roots with symbiotic nodules capable of fixing atmospheric nitrogen and by woody fruits resembling small cones, the genus includes numerous species widespread across temperate and subarctic zones.
• Alnus glutinosa — The scientific name of the black alder, a deciduous tree species in the family Betulaceae, native to most of Europe, Western Asia, and northern Africa. This structural tree thrives in excessively wet soils, swamps, and along watercourses, possessing the ecological ability to fix atmospheric nitrogen into the soil through root bacterial symbiosis and features dark green leaves that are sticky when young.
• Amentaceous — Having the structure, shape, or appearance of a catkin; belonging to or characteristic of amentaceous plants. In plant morphology, it describes an organ, an inflorescence, or a floral envelope that is simplified and structurally adapted for wind pollination, presenting a dense, flexible, and elongated arrangement of its components.
• Amentiferous — Bearing or producing catkins (aments); an ecological and morphological characteristic of trees or shrubs whose inflorescences are structured in the form of elongated, pendulous clusters. This term defines the biological adaptation of plants to wind pollination, having simplified reproductive elements exposed directly to air currents.
• 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.
• Anemomorphosis — An adaptive morphological or structural modification of plants, caused by the mechanical and constant action of strong winds. This ecological phenomenon leads to the deformation of tree crowns (flagging), stunting of vegetation, or bending of stems to reduce air resistance and survive in exposed environments.
• Annona — An institution, administrative service, or tax in Ancient Rome responsible for the collection, storage, and centralized distribution of grain and staple foods to the urban population. In the field of botany, capitalized (Annona), it denotes a genus of tropical trees and shrubs from the Annonaceae family, cultivated for their large, fragrant, edible fruits.
• Arboretum — A specialized botanical garden or managed natural area dedicated to the cultivation, collection, and scientific study of a wide variety of tree, shrub, and woody plant species kept in optimal development conditions. These spaces serve as nurseries for dendrological biodiversity conservation, acclimatization of exotic species, and public ecological education.