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What is the difference between Sempervivum arachnoideum and Sempervivum 'Purple Beauty'? A detailed guide to identification

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Leaf differences: Sempervivum arachnoideum has tightly packed leaves arranged in a rosette shape, with obovate leaves and white hairs at the leaf tips; Sempervivum 'Purple Beauty' has waxy leaves with small fine hairs along the edges, thick leaves, and a rosette form. Flower differences: Sempervivum arachnoideum has pink flowers about 2 cm in diameter; Sempervivum 'Purple Beauty' has cyme-like panicle inflorescences, with colors including red, white, yellow, and more.

I. Leaf differences

The leaves of Sempervivum arachnoideum are arranged very tightly in a rosette shape, green with a touch of red in the middle, and have white hairs at the leaf tips that connect at the top of the plant like a spider web. The leaves have no petioles and are obovate.

The leaves of Sempervivum 'Purple Beauty' are waxy, with small fine hairs along the edges. When there is plenty of sunlight, the leaves wrap very tightly together, and in winter and spring the leaves take on a dark red color. The leaves are thick, generally in a rosette form, and have filamentous hairs on them.

II. Flower differences

The flowers of Sempervivum arachnoideum are pink, about 2 cm in diameter.

Sempervivum 'Purple Beauty' has cyme-like panicle inflorescences, with colors including red, white, yellow, and more.

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