Wilkesia gymnoxiphium
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| iWilkesia gymnoxiphium | ||||||||||||||
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 Wilkesia gymnoxiphium growing in Limahuli Garden and Preserve
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| Wilkesia gymnoxiphium |
Wilkesia gymnoxiphium (Hawaiian iliau) is a species of Wilkesia native to Kauai, Hawaii. It is a descendant of the North American tarweed.
Wilkesia gymnoxiphium is an unbranched monocarpic rosette shrub, with rosettes elevated on woody stems as much as 5 meters tall. Distinctive features include a commonly unbranched, monocarpic axis, leaves in whorls of 9-15 that join to form a basal sheath around the stem, and peduncles that are commonly branched. Fountains of yellow, daisy-like flowers form mostly May to July.
This species occurs only on Kauai, on dry ridges or dry to mesic forests. Elevations range from about 425-1100 meters, with precipitation ranging from 80-200 cm per year.
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