Huperzia × koolauensis

Huperzia × koolauensis, also known as the Koolau hound's tongue fern or Koolau forked polypody, is a rare and endemic species of flowering plant in the family Huperziaceae.

This plant is believed to have medicinal properties, particularly in its ability to inhibit acetylcholinesterase, an enzyme that breaks down acetylcholine, a neurotransmitter involved in memory and learning.

The health benefits of Huperzia × koolauensis are thought to include improved cognitive function, enhanced memory, and potential neuroprotective effects.

In traditional Hawaiian medicine, the plant is prepared as a tea or tincture, often combined with other herbs to promote overall well-being and alleviate symptoms of neurodegenerative diseases.