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Kadua cookiana
Cook's bluet (Kadua cookiana) is a rare, federally endangered subshrub from Kauai, Hawaii, that grows from cracks in basalt walls beside waterfalls. The key to growing it is wet, humid conditions and steady moisture, which is why it is seldom cultivated outside its native habitat.
Kadua cookiana (formerly Hedyotis cookiana) is a rare species of flowering plant in the coffee family known by the common names 'awiwi and Cook's bluet. It is endemic to Hawaii, where it is known only from Kauai, having been extirpated from Molokai and Hawaii. It is a federally listed endangered species of the United States.
Today there are two populations of the plant in the Hanakoa and Waiahuakua Valleys on the Nā Pali Coast of Kauai, with a total global population of no more than 122 individuals. The plant grows next to flowing water, particularly waterfalls, where it grows from cracks in basalt walls next to the falling water. Other plants in the habitat include ahinahina (Artemisia australis), kookoolau (Bidens forbesii, akoko (Chamaesyce celastroides var. hanapepensis), kikawaio (Christella cyatheoides), 'uiwi (Kadua elatior), and uki (Machaerina angustifolia).
Variable starviolet · Kadua cordata · Kio`ele · Kadua degeneri · Kadua laxiflora · Kadua parvula · Kadua romanzoffiensis · Kadua st-johnii · Kadua
Text excerpted from the Wikipedia article Kadua cookiana by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
