How to identify Star cactus (Haworthia retusa)
Star cactus, also known as Cushion aloe
Star cactus forms star-shaped rosettes, which can be identified by its glassy, fat leaves arranged in a spiraling pattern. These leaves are notable for their pointed, 'retused' shape—where the end inwardly curves, resembling a cusp or scoop. Each leaf is adorned with transparent areas known as 'epidermal windows' at the top, creating a striking light-catching effect. The windows help to distinguish the plant, giving it a luminous quality. Typically, the rosettes will not exceed 4 inches (10 centimeters) in diameter, making it a petite and compact houseplant or groundcover.
Lifespan: Perennial
Plant Type: Succulent, Herb
Leaf Type: Evergreen
Rosettes with pointed, inwardly curving leaves and epidermal windows for light-catching effect.
Small white flowers in racemes up to 20 inches (50 cm) tall with sparse, delicate appearance.
Ovoid to oblong capsules with winged seeds, transitioning from green to earthy tones.
Thick, triangular leaves with translucent windows, colors ranging from green to reddish.
The leaves of star cactus are thick and triangular, measuring approximately 1-2 inches (2.5-5 cm) in length. They have a somewhat truncated top that is covered by a translucent 'window,' giving the leaf its distinct triangular shape. The leaves display various colors depending on the light exposure, ranging from green to reddish hues. The texture is smooth and slightly fleshy, with no prominent veins. These key features are crucial for identifying star cactus.
The flowers of star cactus are small, typically white, and arranged in racemes that can reach up to 20 inches (50 cm) in height. The flower stalks (peduncles) are erect and simple, adorned with a few sterile, membranous bracts that are small and range from lanceolate to ovate in shape. The pedicels are short and ascending, contributing to the overall sparse but delicate appearance of the flower cluster. These features facilitate identification by highlighting the unique arrangement and structure of the flowers.
The fruit of star cactus is an ovoid to oblong capsule, typically 3-locular, indicative of its division into three internal compartments. These capsules house seeds characterized by winged angles, increasing their dispersal capability. As the fruit matures, it may exhibit a slight variation in color, transitioning from a green hue that camouflages with the foliage to a more muted, earthy tone which may aid in distinguishing it from the succulent leaves. It's important to note that the capsular fruit and winged seeds are key identifying features for this species. The texture of the capsule exterior can be described as relatively smooth with a dry, dehiscent nature upon maturity, releasing the seeds for propagation.
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Scientific Classification of Star cactus
