Urban Arboretum: Frontier Entrance

October 20, 2022

Scroll through the gallery to learn about these unique plants. Click on the header image to return to the main page.

Adiantum x tracyi at Amazon Frontier
Adiantum x tracyi
Also known as the maidenhair fern. This species is a naturally occurring hybrid between two fern species, Adiantum aleuticum and Adiantum jordanii. This hardy fern is native to North America, East Asia, and the Himalayas.
Quercus lobata at Amazon Frontier
Quercus lobata
Also known as the valley oak. This species is endemic to California and is the largest of the California oak species. When fully mature, the tree may grow up to 95 feet tall.
Quercus lobata at Amazon Frontier
A closer look at the bark of Quercus lobata.
Quercus lobata at Amazon Frontier
A closer look at the foliage of Quercus lobata.
Species at Frontier
Vaccinium ovatum
This variety of evergreen huckleberry is also known as scarlet ovation because its foliage is more scarlet in color than the traditional huckleberry. Watch this plant bloom from late spring to early summer and produce beautiful black huckleberries in the fall!
Sidalcea virgata at Frontier
Sidalcea virgata
Also known as the rose checker-mallow. This bright pink flower blooms from April until June and is native to the West Coast of the United States. You are most likely to find it at low elevations in prairies and meadows.
Species at Frontier
Polystichum munitum
Commonly called the Western sword fern. This evergreen species is abundant in forested areas along the Pacific Coast. It prefers low altitude, high moisture, and cool temperatures.
Species at Frontier
Mahonia nervosa has many names, such as the Cascade barberry or dwarf Oregon-grape tree. Its holly-like, glossy, dark green leaves change to red or bronze in the winter. During the spring, this tree will bloom yellow flowers, which turn to blue-black berries in the fall. Like grapes, these berries make delicious jams and jellies, however they do not taste great raw!