Lorence & W.L.Wagner
Hibiscadelphus woodii (Wood's hau kuahiwi) was a species of flowering plant in the mallow family, Malvaceae, endemic to Kauai, Hawaii. It was a small tree, reaching a height of 2.5–5 m (8.2–16.4 ft).
It was discovered in 1991 and described as a new species in 1995. Only four individuals were found at that time; three of those were crushed by a boulder and died between 1995 and 1998, and the last was found dead in 2011. Pollen was found to be inviable, no fruit set was ever observed and all attempts at propagation, including by cross-pollination with H. distans, failed.
Hibiscadelphus woodii inhabited basalt scree and cliff walls in ʻōhiʻa lehua (Metrosideros polymorpha) dominated mixed mesic forests at an elevation of 915 m (3,002 ft). Associated plants include koʻokoʻolau (Bidens sandvicensis), ʻāhinahina (Artemisia australis), alani (Melicope pallida), naʻenaʻe (Dubautia spp.), ʻānaunau (Lepidium serra), nehe (Lipochaeta spp.), kolokolo kuahiwi (Lysimachia glutinosa), Carex meyenii, ʻakoko (Euphorbia spp.), manono (Hedyotis spp.), kuluʻī (Nototrichium spp.), Panicum lineale, kōlea (Myrsine spp.), Stenogyne campanulata, Lobelia niihauensis, and Mann's Bluegrass (Poa mannii).
- Clark, M. (2016). "Hibiscadelphus woodii". IUCN Red List of Threatened Species. IUCN. 2016: e.T35153A83801779. doi:10.2305/IUCN.UK.2016-2.RLTS.T35153A83801779.en. Retrieved 13 April 2017.
- "Hibiscadelphus woodii". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 14 May 2015.
- Wood, K.R. (2012). "Possible extinctions, rediscoveries, and new plant records within the Hawaiian Islands" (PDF). Bishop Museum Occasional Papers. Bishop Museum Press. 113: 91–102.
- "Hibiscadelphus woodii". CPC National Collection Plant Profiles. Center for Plant Conservation. 2008-07-22. Archived from the original on 2010-10-30. Retrieved 2009-11-14.
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