Categories Perennials | white flowers | Cerastium tomentosum Cerastium tomentosum Common name(s): Snow-in-Summer Synonyme(s): N/A Family: Caryophyllaceae Origin: Italy More infos: drought tolerant perennial for sunny places. Can be used as ground cover. USDA zone 4. Related plants:Agrostemma githago Arenaria montana Arenaria serpyllifolia Dianthus barbatus Dianthus carthusianorum Dianthus caryophyllus Honckenya peploides Lychnis chalcedonica Lychnis × arkwrightii “Vesuvius” Petrorhagia prolifera Sagina subulata Saponaria ocymoides Saponaria officinalis Silene coronaria Silene coronaria “Alba” Silene dioica Silene latifolia Silene nutans Silene vulgaris Stellaria holostea Stellaria media Vaccaria hispanica