
Mountain ilima or “ilima kuahiwi” is one of the most charming native Hawaiian flowers in the wooded and mountainous areas of Hawaii. Its dainty yellow-orange flowers and lush green foliage make it an exquisite sight along the mountain trails throughout the Hawaiian Islands.
Ilima (Sida fallax) is indigenous to Hawaii and is found on all the main islands. It is also found on other island groups throughout the Pacific and on the continent of Asia. Ilima varies greatly in height, leaf size and shape, and flower color. In Hawaii, beach ilima, known as “ilima papa”, grows prostrate on the sand as ground cover 6 – 12 inches high, while mountain ilima grows as a shrub that can reach up to 10 feet high.

Ilima kuahiwi grows in a wooded area with kiawe trees in Lualualei Valley in Waianae on Oahu. In this habitat, ilima grows as a shrub 5 feet tall and competes for open sunlit areas against tall grasses.

Ilima flowers no more than an inch across bloom in great numbers after weeks of rain nourish the wooded and mountainous areas of Waianae during the rainy season in winter.

The petals of ilima are paper thin and are easily bruised. The ilima flowers in this photo are not completely open — their petals form a cup around the stamens and pistils at the center of the flower.

When ilima flowers fully open their petals extend outwards to show their attractive irregular shape. Ilima is the flower for the island of Oahu and is often fashioned into leis. Ilima was also used for medicinal purposes as a treatment for a number of conditions.
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Sources:
Hawaiian Native Plant Propagation Database
Hawaiian Ethobotany Online Database
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