Alphitonia ponderosa
Alphitonia ponderosa is a species of flowering tree in the family Rhamnaceae, that is endemic to the Hawaiian Islands. It is locally known as kauila, as is the related Colubrina oppositifolia.
Description
Alphitonia ponderosa is a medium to large tree, reaching high with a trunk in diameter.
Leaves
The alternate leaves are ovate, long, and have petioles. The leaves are shiny, hairless, and green on the top, but are a dull light green with rust-colored veins on the bottom.
Flowers
Flowers of A. ponderosa are polygamous and form cymes at the bases of leaves. They are in diameter; the five sepals are and cover five petals.
Fruit
The fruit of A. ponderosa is a diameter drupe, which contain two to three seeds. The seeds are shiny, oblong, and have a red covering.
Habitat
Alphitonia ponderosa inhabits dry, coastal mesic, and mixed mesic forests at elevations of on all main islands, but is rare except on Kauai. It grows as a shrub on exposed ridges.
Uses
The reddish-brown wood of A. ponderosa is highly prized for its beauty, strength, and density. It was used as a replacement for metal by the Native Hawaiians, who made laau melomelo,,,, ōō,,, and kii with it.
Conservation
Alphitonia ponderosa is considered a vulnerable species by the IUCN because of its fragmented distribution and declining population. Major threats include rats, pigs, deer, competition with introduced species of plants, and wildfire.