astrophytum sp. - yellow cactus flower with yellow stamens and pistil in botanical collection

arid asterias astrophytum myriostigma nudum bloom blooming botany cactaceae cacteae cacti cactoideae cactus flower caryophyllales close closeup collection desert desertplant dry eudicots exoticplant flora floral greenhouse hardy hobby house plant houseplant macro mexico nature needles ornamental prickly round spine star succulent succulents vegetation wildlife