are Cladanthus and Oxydendrum both plant genus ?
Cladanthus Cladanthus is a genus of plants in the family sunflower family, native to the Mediterranean region.
Cryptanthus Cryptanthus is a genus in the botanical family Bromeliaceae, subfamily Bromelioideae. The genus name is from the Greek “cryptos” (hidden) and “anthos” (flower). This genus has two recognized subgenera: the type subgenus and "Hoplocryptanthus" . All species of this genus are endemic to Brazil. The common name for any "Cryptanthus" is "Earth Star".