Acacia koaia Acacia koaia Acacia koaia, known as koaia or koaie in Hawaiian, is a tree in the pea family, Fabaceae, that is endemic to Hawaii. It is closely related to "koa" ("A. koa"), and is sometimes considered to be the same species. "Acacia koaia" is usually distinguished by growing as a short (rarely more than ), broad, gnarled tree; having the seeds longitudinally arranged in the pod; shorter, straighter phyllodes; and much denser wood. A population on the northern coast of Kauai may be intermediate, but the relationships have not been worked out. "Koaia" wood is claimed to be very different
Nin Jiom Pei Pa Koa in 1962, and continue to manufacture and sell the product worldwide. "Pei pa koa" had annual sales of HK$350 million in 2014. A study at the China Academy of Traditional Chinese Medicine published in a 1994 article, "Pharmacological studies of nin jion pei pa koa", states that Nin Jiom Pei Pa Koa had significant cough relieving and sputum removing effects. In four acute or sub-acute inflammatory models, the anti-inflammatory effect was marked.." "Pei pa koa" is made up of a blend of herbal ingredients including the fritillary bulb ("Bulbus fritillariae cirrhosae", 川貝母), loquat leaf ("Eriobotrya japonica", 枇鈀葉), ladybell root ("Adenophora