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Post by Melanie on Jan 7, 2007 21:35:17 GMT 1
Range Kona District on Hawaii.
Population No adult trees have been found this century, although a population was located of what appeared to be precociously flowering juvenile individuals.
Habitat and Ecology A small palm-like tree recorded in rainforest.
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Post by anotherspecialist on Jul 6, 2008 20:25:48 GMT 1
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Post by Melanie on Jul 6, 2008 23:17:05 GMT 1
Cyanea marksii
Mark's Cyanea
Species Description
Palm-like trees, 2 m tall. Leaves dimorphic. Juvenile plants with leaf blades 13-18 cm long, 5.5-7 cm wide, upper surface aculeate, lower surface pubescent and aculeate. Mature plants with leaf blades oblong to oblanceolate, 25-31 cm long, 8-12 cm wide, upper surface smooth or muricate, lower surface pubescent. Racemes 5-8-flowered, clustered among the leaves. Corollas blackish purple externally, white within, 70-80 mm long.
Habitat
Wet forests on old lava flows. The species has been recorded to be growing "in clumps from one rootstock on fallen moss-covered trunks of cibotium [treefern] " (rock 1957).
Global Range
Cyanea marksii is endemic to the island of Hawaii in the Hawaiian islands. It is known only from the district of south kona, which is on the western flank of mauna loa, an active volcano. It has been recorded only from a small portion of south kona inland of the settlements of honaunau and hookena.
Abundance
Currently unknown, but c. Marksii was described as being common where it was last collected in 1970 (d. Herbst 1701, bish).
Global Threats
The forests and rare plants of south kona are threatened by cattle grazing, logging, feral pigs, and alien plants.The plants are also naturally threatened by lava flows from mauna loa. In the last couple of centuries a number of eruptions at the upper elevations of mauna loa have sent lava flows through the forests of south kona and on into the ocean.
Permanence
Perennial.
Taxonomic Comments
Genus endemic to hawaiian islands, species endemic to island of hawaii. This species is related c. Macrostegia and c. Tritomantha and known primarily from flowering juvenile individuals.
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Post by koeiyabe on Jan 3, 2020 18:32:26 GMT 1
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Post by koeiyabe on Jan 11, 2021 18:38:58 GMT 1
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