Argyrocytisus battandieri, commonly known as the Moroccan broom, is a shrub native to the Mediterranean region. It is an evergreen, drought-tolerant shrub with fragrant yellow flowers.

Argyranthemum meteor red is a stunning flowering plant with bright red petals and yellow centers. It is an easy-to-care-for perennial that blooms from spring to fall.

Arctotis fastuosa is a species of flowering plant native to South Africa. It is an evergreen shrub with bright yellow daisy-like flowers and silvery-green foliage. It is a popular ornamental plant, often grown in gardens and containers.

Arbutus unedo, commonly known as the Strawberry Tree, is an evergreen shrub or small tree native to the Mediterranean region. It produces edible fruits and is often used as an ornamental plant.

Araiostegia parvipinnata is a species of bryozoan found in the western Atlantic Ocean. It is a small, cylindrical, encrusting species with short, pointed zooids. It is found on hard substrates, such as rocks and shells.

Arachniodes simplicior variegata is a type of evergreen fern with variegated foliage. It grows in a clumping form and has bright green and yellow leaves. It is a great addition to shady gardens and is easy to maintain.