common houseleek sempervivum tectorum subsp. alpinum, reddish blooming

alpinum bears botanical clusters common crassulaceae cultivar endemic evergreen family flora flowering flowers habitat houseleek hybrid inflorescence natural offsets perennial plant rarity reddishpurple rosetteforming sempervivum spreading stonecrop subsp succulent summer tectorum variety wild reddish blooming rosette-forming reddish-purple drought tolerant subsp