- A wetland rush with long, thick leaves
- Flower is brown and shaped like a cigar, seeds spread by wind
- Long stem grows underground into a creeping mat
- Native to Eurasia, Africa, and North America, introduction history in Hawaii unknown. First discovered on Oahu in 1979
- One flower head can produce 250,000 seeds, which spread by wind and are viable for 100 years
- Underground runners can produce new plants
- Takes over wetlands, crowding out native plants and destroying native waterbird habitat (leaving endangered Hawaiian stilt and koloa duck homeless)
- Threatens the taro industry as it invades loi (taro patches). Difficult and costly to reclaim infested areas for taro production
- Populations in Kekaha, Makaweli and Waimea Valleys, Lawai, Koloa, Poipu, Mahaulepu, Nawiliwili, Hanamaulu, Kealia, Kilauea, and Hanalei.
- KISC is working to control as many populations as possible, but asks that landowners help by controlling this pest wherever possible. Contact KISC for control advice at 808-821-1490 or email@example.com.
- On the Pono Endorsement Black List. Pono Endorsed Nurseries and Landscapers have agreed to continue to not sale cattail.
Uki Uki could similarly look like Cattail. Although Uki Uki’s more suitable habitat is in mesic forests, and most likely seen as a ground cover or understory growth. This plant is also distinguishable by its bright blue round fruits.