#weeds

• Agrobotany — A branch of botany that deals with the study of cultivated plants and weeds affecting agricultural crops, analyzing their structure, evolution, and economic utility. It provides the theoretical foundation for acclimatizing new species, selecting productive varieties, and effectively controlling harmful spontaneous flora in crops.
• Ruderal plants — A specialized term used in botany and ecology to designate ruderal plants, weeds, or pioneer vegetal species that grow on degraded lands, roadsides, debris, or anthropized soils deeply modified by human activity. These organisms exhibit outstanding resilience and the ability to rapidly colonize unstable habitats.
• Cypress spurges — The plural form of the masculine noun 'alior'; designates multiple specimens of the herbaceous plant Euphorbia cyparissias or, broadly, related species from the Euphorbiaceae family, known for secreting an abundant toxic and caustic latex. In the context of Romanian spontaneous flora, the term identifies communities of such plants colonizing dry pastures.
• Allium triquetrum — The scientific name of a wild onion species in the family Amaryllidaceae, native to the Mediterranean basin and commonly known as 'three-cornered leek' or 'triquetrous garlic'. The plant is easily recognized by its flower stems, which are sharply three-angled in cross-section, and produces drooping clusters of white, bell-shaped flowers marked with a distinct green stripe on each petal.
• Ampelopsis brevipedunculata — The historical or synonymous scientific name of the species 'Ampelopsis glandulosa' (specifically the brevipedunculata variety), a deciduous woody climbing vine in the grape family (Vitaceae), native to East Asia and popularly known as porcelain berry. It is widely cultivated for its spectacular, multicolored berries that transition from green and yellow to vivid shades of blue, turquoise, and purple, though it exhibits highly invasive tendencies outside its native range.
• Regional plant variety — A popular and regional name attributed to certain plant species of the genus Erigeron or Sonchus, used in traditional empirical medicine or recognized as crop weeds in specific regions. In an archaic phytopathological sense, the term can also describe the destructive effect of scorching or premature drying of leaves caused by solar heat or parasitic fungal attacks.
• Field weeds — A rare plural form of the noun 'arvă' (meaning grass or crop plant), often used as a Romanian adaptation for plants of the Arvella family or common field weeds. In an agricultural ecological sense, the term describes spontaneous segetal vegetation that structurally competes with main cereal crops in lowland areas.
• Wild chervil — A common name for several plant species in the Apiaceae family (such as Anthriscus sylvestris or Chaerophyllum temulum) that grow freely in nature; although it strikingly resembles the chervil used as a seasoning, it has a much stronger taste and rougher leaves. Some varieties can be toxic, which is why gathering it from wild flora requires a very rigorous botanical identification.