Borisii, Sempervivum ciliosum var. borisii . Scientific Classification. Family: Crassulaceae Subfamily: Sedoideae Tribe: Sedeae Subtribe: Sedinae Genus: Sempervivum. Description. Sempervivum ciliosum is a mat-forming succulent that forms rosettes of fleshy, grey-green, pointed, and very hairy leaves. It grows up to 4 inches (10 cm) tall and spreads up to 20 inches (50 cm) wide.