Clay's Hibiscus vs Saint John's Rosemallow

Hibiscus clayi compared with Hibiscus kokio

Key Differences

• Clay's Hibiscus is Critically Endangered while Saint John's Rosemallow is Vulnerable.

Taxonomic Classification

Rank	Clay's Hibiscus	Saint John's Rosemallow
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order same	Malvales (Malvales)	Malvales (Malvales)
Family same	Malvaceae	Malvaceae
Genus same	Hibiscus	Hibiscus
Species	Hibiscus clayi	Hibiscus kokio

Evolutionary Relationship

Clay's Hibiscus and Saint John's Rosemallow share a common ancestor at the Genus level: Hibiscus.

Conservation Status

Clay's Hibiscus

CR — Critically Endangered

Saint John's Rosemallow

VU — Vulnerable

Physical Characteristics

Attribute	Clay's Hibiscus	Saint John's Rosemallow
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Clay's Hibiscus

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Saint John's Rosemallow

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Clay's Hibiscus

Clay's Hibiscus, Hibiscus clayi, is a rare flowering shrub in the family Malvaceae endemic to the island of Kauai in the Hawaiian archipelago. It is one of the native Hawaiian hibiscus species belonging to the kokio group, characterized by brilliantly colored flowers adapted to pollination by native Hawaiian honeycreepers, which probe the tubular flowers for nectar. Hibiscus clayi produces large, vivid red to orange-red flowers with five overlapping petals surrounding a prominent staminal column, typical of the hibiscus form. The shrub grows in dry to mesic forest habitats at low to moderate elevations on Kauai, where it is associated with native Hawaiian dryland forest communities. Like many Hawaiian plants, Clay's Hibiscus evolved in near-total isolation and is adapted to a unique ecological community that has been severely disrupted by the introduction of non-native species, habitat conversion, and the decline of native pollinators. The species is critically threatened by habitat loss, competition from invasive plants, and the extinction of native Hawaiian honeycreeper pollinators due to introduced avian malaria. Hibiscus clayi is listed as Endangered and is the subject of conservation efforts including propagation in botanical gardens and habitat restoration projects on Kauai.