- HPRWA SCORE 14
- FAMILY Melastomataceae
- CATEGORY Trees
miconia (Miconia calvescens)
Miconia calvescens is very invasive and is on the Hawai`i State Noxious Weed List. The Division of Forestry and Wildlife of the Hawai`i Department of Land and Natural Resources has designated this species as one of Hawai`i's Most Invasive Horticultural Plants.
- Large tree grows up to 50 ft tall
- Large oval-shaped leaves (up to 3 ft long), green on top, purple underneath, with three main midribs running from stem to leaf-tip
- Tan flowers are in upright clusters at branch tips; small round fruit (red immature to dark blue mature)
- Found on Big Island, currently being controlled on Kaua`i, O`ahu, and East Maui; native to South and Central America
- Seeds spread by birds and as a contaminant on hiking boots, gear, and pigs
- Can grow from seed to mature seeding tree in four years. A mature tree can produce about 3 million seeds several times per year. Seeds can remain viable for 20 years before sprouting
- Forms thick stands, shades out native plants and completely takes over moist and wet forests
- Forms an "umbrella" over the watershed, potentially reducing the amount of rainwater that seeps into the watershed
- Shallow root systems promotes erosion
- Introduced to Tahiti in 1937 and has since overwhelmed two-thirds of Tahiti's forests, and is directly responsible for threatening 25% of their native forest species with extinction.