Dubautia ciliolata (DC) D. Keck

Erect, often much branched woody shrub to 1.8 dm tall, leaves in whorls of 3 or opposite on vegetative stems, becoming alternate above in flowering stems. Diagnostic features of the species include thick, uninerved, often whorled leaves less than 3 cm long and 7 mm wide, yellow flowers, and pappus of ascending-setose aristae. Most flowering occurs from June to November.

This species is found only on the island of Hawai'i, in scrub vegetation of relatively, young, well-drained substrates of Kilauea, Mauna Loa, and Hualalai at elevations ranging from 600 - 2,900 m (subsp. ciliolata) and Mauna Kea at elevations ranging from 1,800 -3,200 m (subsp. glutinosa G. Carr). The sites occupied by the species receive about 40-300 cm of annual precipitation.

Last Modification: April 21, 2006

Each "thumbnail" image below is linked to a larger photograph.


Subsp. ciliolata in flower. (photo 1977, Hawai'i Volcanoes National Park, Hawai'i)
Subsp. ciliolata.  (the stem was wand-like and unbranched below this point).
View of flowering heads, subsp. ciliolata. (photo 1977, Hawai'i Volcanoes National Park, Hawai'i).  The capitulescences tend to be secund.
As in several other species of Dubautia, including all of those with 13 pairs of chromosomes, and some with 14 pairs, the receptacular chaff is uniseriate and strongly coalesced, forming a cup-like false involucre. (subsp. ciliolata)
Flowering individual of subsp. glutinosa at about 3,140 m elevation. In this subspecies there are commonly only 3 heads in each cluster. (photo 1978, Mauna Kea, Hawai'i)

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