common houseleek - sempervivum tectorum

alpine alps alternative angiospermae botanical botany bud chicks ciliate common crassulaceae earwort flora flower flowering garden gardening gardens green hens herbal herbalism homeopathy houseleek houseleeks medicinal medicine mountain natural nature nubs perennial pharmacognosy phytomedicine phytotherapy plant rock rockery rockwork roof rosettes saxifragales sempervivum shoots stone succulent sucker summer tectorum thunderplant used vegetation