#botanical classification

• Crested wattle — A distinct shrub or small tree in the legume family, native to Western Australia, commonly known as the 'crested wattle' or 'plume albizia'; it is characterized by rapid growth, dark green pinnate leaves, and dense, cylindrical, greenish-yellow or cream inflorescences resembling small brushes.
• Anchusa — A genus of herbaceous plants in the family Boraginaceae, commonly known as bugloss or alkanet. It includes numerous annual, biennial, or perennial species native to Europe, Western Asia, and North Africa, notable for the stiff hairs covering their stems and leaves, and flowers grouped in scorpioid cymes, featuring an intense azure-blue, purple, or white color.
• Ancistrocactus — A genus of succulent plants in the family Cactaceae, native to the arid and semi-desert regions of the southern United States (Texas) and northern Mexico. It comprises relatively small, globular to cylindrical cacti with well-defined ribs and areoles bearing strong central spines, at least one of which is long and sharply hooked, a morphological feature that gives the genus its name.
• Genus Anemone — A taxonomic genus comprising approximately 200 species of perennial herbaceous plants in the family Ranunculaceae, primarily distributed throughout the temperate and subarctic regions of the Northern Hemisphere. The genus is recognized for its flowers that lack true petals, their role being assumed by brightly colored sepals, and for containing irritating chemical compounds such as anemonin.
• Aristea corymbosa — Scientific name for a rare and robust shrubby species of perennial plants in the Iridaceae family, native to the mountainous regions of South Africa. This plant is particularly spectacular due to its woody stems, fan-shaped leaves, and dense corymb-like inflorescences that produce intense blue flowers, being cultivated worldwide as a collectible ornamental plant.
• Aristolochia clematitis — Scientific name for a toxic, perennial herbaceous plant species in the Aristolochiaceae family, commonly known as birthwort or European birthwort. The plant features cordate leaves and tubular yellow flowers with a characteristic shape, is widespread across Europe, and is historically recognized in traditional medicine, but is extremely dangerous due to aristolochic acid, which causes severe renal failure and urinary tract cancer.
• Aristotelia — Scientific name assigned to a genus of perennial plants in the Elaeocarpaceae family, native to the Southern Hemisphere (such as Aristotelia chilensis or maqui), known for its highly antioxidant berries. Also, in zoological taxonomy, the term denotes a genus of small moths (night butterflies) in the Gelechiidae family, both genera being structurally named as a tribute to the philosopher Aristotle.
• Armeria caespitosa — Scientific name for an endemic species of perennial plant in the Plumbaginaceae family, native to the mountainous regions of central Spain. This rock garden plant forms compact, dense, low cushion-like tufts with rigid linear leaves and compact globose inflorescences consisting of delicate pink or lilac flowers, highly prized in alpine garden design due to its outstanding structural resistance to drought and poor soils.
• Artemis — An adapted form or literary variant for Artemis, the goddess of the hunt, forests, wild animals, and the Moon in Greek mythology, twin sister of Apollo; (in astronomy) a designation attributed to certain celestial bodies, asteroids, or large planetary geological structures; (in biology) a name used regionally or scientifically in the classification of certain medicinal or aromatic plant species from the Artemisia family or aquatic organisms from the Artemia genus.
• Asparagus verticillatus — The scientific name of an herbaceous perennial plant in the family Asparagaceae, commonly known in Romania as 'umbra-iepurelui'; it is a vigorous climbing or scrambling species, distributed spontaneously across xerophytic forests, thickets, and edges of Southeastern Europe and Western Asia, characterized by cladodes grouped in dense whorls along long stems and spherical red berries.
• Asplenium adiantumnigrum — A fern species in the genus Asplenium, popularly known as black spleenwort; it grows on siliceous rocks, old stone walls, and acidic soils in temperate regions. It is characterized by ovate-lanceolate, bi- or tri-pinnately divided fronds of a glossy dark green, supported by rigid stipes that are brownish-black at the base, a structural chromatic trait from which the specific epithet 'adiantum-nigrum' originates.
• Astrophytum capricorne — A species of xerophytic plants within the Astrophytum genus (Cactaceae family), native to the semi-desert regions of Mexico (Chihuahuan Desert), characterized by a spherical stem that becomes cylindrical at maturity, divided into 7-8 sharp ribs. The species is distinguished by its long, flexible, flattened, and twisted spines reminiscent of a goat's horns (or a capricorn's), and by its large, yellow flowers with a deep purple or red center.
• Astrophytum myriostigma — A species of succulent cacti within the Astrophytum genus (Cactaceae family), native to the mountainous and arid regions of central and northern Mexico. The plant has a globose stem completely lacking spines, typically divided into 5 prominent ribs, giving it a three-dimensional star shape; its entire epidermis is densely covered by thousands of trichomes (microscopic white dots), giving it a characteristic silver-white hue, and its large flowers are pure yellow without a red center.
• Twiggy baeckea — The old or synonymous scientific name for Babingtonia virgata (or Sannantha virgata), an erect perennial shrub in the family Myrtaceae. The plant is popularly known for its long, slender (virgate) twigs, deep green linear leaves, and an abundance of small white flowers, often used in horticulture as a hedge or ornamental plant.