The Plant List and International Plant Names Index

• Agapanthus africanus — The type species of the genus Agapanthus, native exclusively to the Cape region of South Africa, characterized by evergreen, narrow leaves and compact spherical inflorescences with deep blue, sometimes dark purple flowers. Structurally, this plant differs from other horticultural hybrids by its slower growth rate and higher sensitivity to low temperatures, being cultivated worldwide as an ornamental collector's species.
• 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.
• Artocarpus — A taxonomic genus of trees in the family Moraceae, comprising approximately 60 tropical species, including the breadfruit (Artocarpus altilis) and the jackfruit (Artocarpus heterophyllus). In structural plant biology, the term defines large woody plants characterized by the secretion of white latex and the production of massive complex fruits attached directly to the trunk or branches.
• Asclepias — A genus of herbaceous perennial plants in the family Apocynaceae (subfamily Asclepiadoideae), popularly known as milkweeds. This taxon comprises over 140 species primarily native to the Americas, structurally remarkable for their complex flowers, toxic latex rich in cardenolides, and an essential ecological role as the exclusive food source for Monarch butterfly caterpillars.
• Astelia banksii — The scientific name of a perennial herbaceous plant species in the Asteliaceae family, endemic to the coastal areas and cliffs of the North Island of New Zealand; popularly known as wharawhara, it is characterized by dense clumps of long, leathery, sword-shaped leaves covered with protective silvery hairs, producing small, globose purple or black berries that serve as food for local wildlife.