#botany genus
- Agropyron — The scientific name (in Latin) for a genus of perennial herbaceous plants in the grass family (Poaceae), popularly known in Romanian as 'pir' (wheatgrass / couch grass). These plants are characterized by long, creeping, and branched rhizomes, possessing a huge capacity for adaptation and spreading; they are often considered difficult weeds to control in crops, but also valuable species for stabilizing sandy soils or as forage.
- Corncockle — The scientific name (in Latin) for a genus of annual herbaceous plants in the pink family (Caryophyllaceae), whose best-known species is the common corncockle (Agrostemma githago). These plants feature erect, hairy stalks and large, solitary, pinkish-purple flowers; they are historically known as noxious weeds within cereal crops, producing seeds that are toxic due to a high saponin content.
- Albizia — A genus of tropical and subtropical herbaceous plants, shrubs, or trees in the legume family (subfamily Mimosoideae), characterized by bipinnate leaves and spectacular flowers with long, silky, pink, white, or yellow stamens; the silk tree.
- Albuca — A genus of perennial herbaceous bulbous plants in the asparagus family (subfamily Scilloideae), native mainly to Southern and Eastern Africa, characterized by linear or spiraled leaves and erect or pendulous flowers with delicate floral stems and specific perianth segments, often yellow, green, or white with dark median stripes.
- Alonsoa — A genus of perennial herbaceous or shrubby plants, native to the mountainous regions of Central and South America (especially the Andes), belonging to the Scrophulariaceae family. These plants are frequently cultivated in horticulture as annual ornamental flowers due to their spectacular asymmetric, bright red-orange inflorescences, popularly known as 'mask flowers'.
- Alopecurus — A genus of perennial or annual herbaceous plants in the Poaceae (Gramineae) family, distributed across the temperate regions of the Northern Hemisphere, popularly known as 'foxtail grass'. These grasses are structurally characterized by dense, cylindrical, spike-like, and silky inflorescences resembling an animal's tail, utilized as valuable forage plants in meadows or cultivated ornamentally.
- Aloysia — A genus of aromatic plants in the Verbenaceae family, native predominantly to the temperate and tropical regions of South and North America. This structural taxon encompasses shrubs or subshrubs recognized for their foliage rich in volatile essential oils, with intense citrusy or minty scents, widely cultivated in horticulture as decorative, medicinal, and aromatic plants.
- Alpinia — A genus of tropical and subtropical perennial herbaceous plants in the Zingiberaceae (ginger) family, distributed predominantly across Asia and the Pacific Islands. This structural taxon encompasses species with large aromatic rhizomes, vigorous pseudostems, and spectacular raceme inflorescences, widely cultivated as decorative, spice, or medicinal plants.
- Alseuosmia — A genus of perennial woody plants, small shrubs native to the temperate and subtropical regions of New Zealand and Australia, representing the type genus of the Alseuosmiaceae family. These shrubs stand out structurally due to their glossy alternate leaves and axillary tubular flowers, often intensely fragrant, studied in botanical taxonomy due to their isolated evolutionary position.
- Alsomitra — A genus of perennial climbing woody vines (lianas) in the Cucurbitaceae family, native to the tropical rainforests of Southeast Asia, Indonesia, and Australia. This structural taxon stands out due to its large, globose, capsule-like fruits and, particularly, its unique winged seeds (such as those of Alsomitra macrocarpa), whose aerodynamic membranous wings mimic the gliding flight of a glider or airplane, historically inspiring early pioneers of modern aviation.
- Alstroemeria — A genus of perennial herbaceous plants in the Alstroemeriaceae family, native to South America (especially from mountainous regions in Chile and Brazil), popularly known as 'Peruvian lilies' or 'lilies of the Incas'. This structural taxon encompasses species recognized for their tuberous rhizomes, resupinate leaves (twisted upside down on the petiole), and intensely colored, asymmetric flowers, widely cultivated in horticulture as cut flowers due to their exceptional longevity in vases.
- Altamiranoa — A historical genus or retired taxonomic synonym (currently classified mostly under the Sedum genus or related species within the Crassulaceae family) that designated perennial succulent plants native to the arid and mountainous zones of Mexico. This structural taxon was described in the classification of xerophytic plants by American botanists Britton and Rose, preserved in old treatises of plant systematics.
- Aotus — A taxonomic genus comprising the night monkeys (or owl monkeys) native to the tropical forests of Central and South America, being the only anthropoid monkeys with predominantly nocturnal activity. In botany, it also represents a genus of flowering plants in the Fabaceae family, endemic to Australia, remarkable for their yellow or golden flowers.
- Aquilegia — A genus of herbaceous perennial plants in the family Ranunculaceae, popularly known as 'columbine'; these structural plants are recognized by their spectacular, rarely shaped flowers equipped with long nectar spurs, being widely utilized in decorative horticulture and studied in evolutionary biology.
- Aquilegia caerulea — A species of herbaceous perennial plants in the genus Aquilegia, native to the Rocky Mountains of North America; this structural plant features large, spectacular, typically bicolor flowers (with white petals and blue sepals), being declared the official state flower of Colorado and frequently used as an ecological symbol and luxury decorative plant.
- Aquilegia chrysantha — A species of herbaceous perennial plants in the genus Aquilegia, native to the southwestern United States and northern Mexico; this structural plant stands out for its large, intense golden-yellow flowers, equipped with exceptionally long and slender nectar spurs, being highly heat-tolerant compared to other alpine species.
- Aquilegia glandulosa — A species of herbaceous perennial plants in the genus Aquilegia, native to the alpine and subalpine zones of Siberia, Mongolia, and China; this structural plant is characterized by fine glandular hairs on its stems and leaves, as well as large, bicolor flowers with intense-blue sepals and white inner petals.
- Aquilegia sibirica — A species of herbaceous perennial plants in the genus Aquilegia, native to the coniferous forests, glades, and alpine meadows of Siberia, Mongolia, and Central Asia; this structural plant stands out for its spectacular bicolor flowers, usually featuring large intense blue-violet sepals and white inner petals, being extremely hardy in severe subarctic climates.
- Aquilegia skinneri — A species of herbaceous perennial plants in the genus Aquilegia, native to the mountainous zones and humid canyons of northwestern Mexico (Sierra Madre Occidental); this structural plant is famous for its spectacular tricolor flowers, featuring greenish-yellow sepals, yellow inner petals, and exceptionally long, bright orange-red nectar spurs.
- Aquilegia transsilvanica — A species of herbaceous perennial plants in the genus Aquilegia, endemic to the mountain chain of the Romanian Carpathians (especially in the high limestone areas of Bucegi, Piatra Craiului, and Făgăraș); this structural plant stands out for its large, intense blue-violet flowers, being declared a monument of nature and strictly protected in alpine reserves due to its restrictive geographical range.