Hibiscadelphus crucibracteatus

{{Short description|Extinct species of flowering plant}}

{{Speciesbox

| image =

| status = EX

| status_system = IUCN2.3

| status_ref = {{cite iucn |author=World Conservation Monitoring Centre |date=1998 |title=Hibiscadelphus crucibracteatus |volume=1998 |page=e.T33556A9793280 |doi=10.2305/IUCN.UK.1998.RLTS.T33556A9793280.en |access-date=17 November 2021}}

| status2 = GH

| status2_system = TNC

| status2_ref = {{cite web |title=Hibiscadelphus crucibracteatus. NatureServe Explorer 2.0 |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.128017/Hibiscadelphus_crucibracteatus |website=explorer.natureserve.org |access-date=10 August 2023}}

| extinct = 1982

| genus = Hibiscadelphus

| species = crucibracteatus

| authority = Hobdy

}}

Hibiscadelphus crucibracteatus (lava hau kuahiwi){{PLANTS|id=HICR|taxon=Hibiscadelphus crucibracteatus|accessdate=14 May 2015}} is an extinct species of flowering plant in the family Malvaceae that was endemic to Hawaii, on the island of Lanai.

It was discovered in 1981 on the Puhielelu Ridge and the single known specimen has since died, with collected seeds failing to germinate.