... Hibiscus clayi is distinguished from Hibiscus kokio, the other kokiʻo ʻula, by having a shorter calyx (the usually green or leafy outside part of a ...
... Bobea sandwicensis flowers are usually unisexual (male or female) with a very prominent calyx (all the sepals of a flower) almost looking like a ...
... flowers of Nothocestrum latifolium are perfect (bisexual), with four greenish-yellow petals that extend beyond the tubular calyx (fused sepals) ...
... of Nothocestrum breviflorum are perfect (bisexual), with four greenish-yellow petals that barely extend beyond the tubular calyx (fused sepals) ...