Cyanea is a genus of flowering plants in the family Campanulaceae. These Hawaiian lobelioids are endemic to Hawaii. They grow in moist and wet forest habitat. Its name in Hawaiian is hāhā.
Over 90% of Cyanea species are found only on one island in the Hawaiian chain.
Most Cyanea are trees with few branches or none. The inflorescence is a raceme of 4 to 45 flowers which grows from the leaf axils. The fruit is a fleshy berry. There have been several theories regarding the evolution of large prickles on plants endemic to islands that lack any mammalian or reptilian herbivores. One such theory suggests that the prickles are a defense against herbivory by the moa-nalo, a few taxa of flightless ducks that were made extinct from the islands relatively recently, within the last 1600 years.
Cyanea flowers are pollinated by birds such as the Hawaiian honeycreepers, and the seeds are dispersed by birds that take the fruits.
There are about 78 species in the genus.
Species include:
Cyanea aculeatiflora – Haleakala cyanea
Cyanea acuminata – Honolulu cyanea
Cyanea angustifolia – hāhā, 'aku,
Cyanea arborea – palmtree cyanea
Cyanea asarifolia – gingerleaf cyanea
Cyanea aspleniifolia – spleenwort cyanea
Cyanea calycina – Waianae Range rollandia, O'ahu cyanea
Cyanea comata – Maui cyanea
Cyanea copelandii – treetrunk cyanea
Cyanea coriacea – leatherleaf cyanea
Cyanea crispa – Koolau Range rollandia
Cyanea cylindrocalyx – splitleaf cyanea
Cyanea dolichopoda – long-foot cyanea
Cyanea dunbariae – ravine cyanea
Cyanea eleeleensis – eleele cyanea
Cyanea fissa – Kauai cyanea
Cyanea floribunda – Degener's cyanea
Cyanea giffardii – Kilauea Mauna cyanea
Cyanea glabra – smooth cyanea
Cyanea grimesiana – splitleaf cyanea
Cyanea habenata – stream-bed cyanea
Cyanea hamatiflora – wetforest cyanea
Cyanea hardyi – Oahu cyanea
Cyanea hirtella – rustyleaf cyanea
Cyanea horrida – prickly cyanea
Cyanea humboldtiana – Oahu rollandia
Cyanea kahiliensis – spoonleaf cyanea
Cyanea kauaulaensis
Cyanea kolekoleensis – kolekole cyanea
Cyanea koolauensis – Palolo Valley rollandia
Cyanea kuhihewa – Limahuli Valley cyanea
Cyanea kunthiana – Kunth's cyanea
Cyanea lanceolata – lanceleaf cyanea
Cyanea leptostegia – giant kokee cyanea
Cyanea linearifolia – linearleaf cyanea
Cyanea lobata – Waihee Valley cyanea
Cyanea longiflora – ridge rollandia
Cyanea longissima – streambank cyanea
Cyanea macrostegia – purple cyanea
Cyanea mannii – Mann's cyanea
Cyanea marksii – Marks' cyanea
Cyanea mauiensis – Maui cyanea
Cyanea mceldowneyi – McEldowney's cyanea
Cyanea membranacea – papery cyanea
Cyanea munroi – Munro's cyanea
Cyanea obtusa – bluntlobe cyanea
Cyanea parvifolia – Waioli Valley rollandia
Cyanea pilosa – hairy cyanea
Cyanea pinnatifida – sharktail cyanea
Cyanea platyphylla – puna cyanea
Cyanea pohaku – pohaku cyanea
Cyanea procera – Molokai cyanea
Cyanea profuga – Mapulehu Valley cyanea
Cyanea purpurellifolia – Panaluu Mountain rollandia
Cyanea pycnocarpa – manyfruit cyanea
Cyanea quercifolia – oakleaf cyanea
Cyanea recta – Kealia cyanea
Cyanea remyi – Remy's cyanea
Cyanea rivularis – plateau cyanea
Cyanea salicina – willow cyanea
Cyanea scabra – harsh cyanea
Cyanea sessilifolia – sessileleaf cyanea
Cyanea shipmanii – Shipman's cyanea
Cyanea solanacea – popolo
Cyanea spathulata – spoonleaf cyanea
Cyanea st.-johnii – St. John's rollandia
Cyanea stictophylla – Kaiholena cyanea
Cyanea superba – Mt. Kaala cyanea
Cyanea truncata – Punaluu cyanea
Cyanea undulata – leechleaf cyanea
