It is part of the Aripo Massif and is located in the Northern Range on the island of Trinidad, northeast of the town of Arima.
For example, during the wet season from May to December, guppies in the Northern Range of Trinidad reduce their investment in reproduction regardless of predation level, possibly in response to decreased food resources.
Specifically, it is only known from several locations in the Heights of Aripo, one of the highest points in Trinidad's Northern Range.
The hills rise abruptly from the lowlands of northern Trinidad (the so-called East-West Corridor), but only the two tallest peaks, El Cerro del Aripo and El Tucuche top 900 m.
Northern Ireland | Northern Territory | Northern Pacific Railway | Kimberley, Northern Cape | Northern Illinois University | Northern Cape | Northern England | Army of Northern Virginia | Cascade Range | Northern California | Northern Italy | Royal Northern College of Music | Northern Ireland national football team | Northern | Northern Hemisphere | Northern Exposure | Northern Ontario | Northern Province | Northern Mariana Islands | Northern League | Range Rover | Northern Rhodesia | United States District Court for the Northern District of California | Palmerston, Northern Territory | Northern Germany | Northern Wei | Northern Ireland Assembly | Katherine, Northern Territory | Great Dividing Range | Northern Ndebele people |
The Aripo Valley, a valley in the Northern Range immediately to the west of the Arima Valley
Fossils of the Middle Eocene outcrops near Quilchena, British Columbia added to the northern range of the species and are associated with a second species of Eucommia, E. rowlandii.
It has declined severely in part of its northern range due to the disappearance of its heathland habitat and by the early 1990s the species was reduced to a single surviving colony of just 100 individuals in Coates, West Sussex
It is named after Martha Washington and not the state of Washington; in fact, as the northern range of the plant is near Mount Hood in Oregon, it does not naturally occur in the state of Washington.