#trichomes
- Air plant — Flower of the air; a term used as a specific epithet or common name for various epiphytic plant species, particularly within the Tillandsia genus (family Bromeliaceae), remarkable for their structural capacity to live suspended without soil, absorbing water and nutrients directly from atmospheric humidity through specialized hairs called trichomes.
- 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.
- Asterotrichous — Having star-shaped or starry-branched hairs; a specialized botanical adjective used to describe plants, stems, or leaves whose epidermal pubescence consists of stellate trichomes (irregular hairs with geometric rays), acting as an anatomical defense against excessive transpiration.
- Astrophytum — A genus of succulent plants within the Cactaceae family, native to the arid and semi-desert regions of Mexico and the southern United States (Texas). These cacti are characterized by globose or cylindrical stems, often lacking spines in adult state, decorated with prominent ribs and microscopic white dots formed by coarse hairs (trichomes), possessing a general star-like appearance reminiscent of a star or marine astroid.
- 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.