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California also has 1,023 species of non-native plants, some now problematic invasive species such as yellow starthistle, that were introduced during the Spanish colonization, the California Gold Rush, and subsequent immigrations and import trading of the 18th, 19th and 20th centuries.
Umbellularia californica is a large hardwood tree native to coastal forests and the Sierra foothills of California, and to coastal forests extending into Oregon. [2] It is the sole species in the genus Umbellularia.
Native ash species, including white ash (pictured), have been declining rapidly this century due to predation by the emerald ash borer. [1]Silvics of North America (1991), [2] [3] a forest inventory compiled and published by the United States Forest Service, includes many hardwood trees.
This list of botanical gardens and arboretums in California is intended to include all significant botanical gardens and arboretums in the U.S. state of California. [ 1 ] [ 2 ] [ 3 ] Name
Green’s mountain ash (S. scopulina) is native to the mountains from Alaska to California, and east to the Rocky Mountains and Northern Great Plains. It grows as a multi-stemmed shrub that is ...
California black oak comprises a total volume of 29% of California's hardwood timber resources, and is the major hardwood sawn into lumber there. The total estimated area of species occurrence is 361,800 hectares (3,618 square kilometers or 894,000 acres); 239,200 ha (2,392 km 2 or 591,000 acres) of timberland and 122,600 ha (1,226 km 2 or ...
Robinia pseudoacacia, commonly known in its native territory as black locust, [3] is a medium-sized hardwood deciduous tree, belonging to the tribe Robinieae of the legume family Fabaceae.
The descendants of Native American tribes on the Northern California coast are reclaiming a bit of their heritage that includes ancient redwoods that have stood since their ancestors walked the land.