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A list of invasive plant species in California. Numerous plants have been introduced to the California Floristic Province and within the state's borders. Many of them have become invasive species and/or noxious weeds. The following are some of these species:
The leaves are opposite, simple, ovate or oblong, 7.5 to 20 centimetres (3.0 to 7.9 in) long and 2.5 to 10 centimetres (0.98 to 3.94 in) broad, with a petiole 2 centimetres (0.79 in) long, and an entire margin; they are hairless above, and finely downy below, particularly along the veins, and turn yellow in fall.
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.
The flowers are white, produced in panicles 3–12 cm (1–5 in) long. The fruit is a blue-black drupe 1–1.5 cm (0.4–0.6 in) long and 0.6–1 cm (0.2–0.4 in) in diameter. [3] It is cultivated in Europe and North America as an ornamental tree, valued for its feathery white flowerheads. [4]
[4] [5] The very fragrant flowers are quite large, about 40 mm (1.6 in) diameter with a floral tube up to 28 mm (1.1 in) long. [4] They are initially functionally male, and coloured white with lemon tinges. Over a period of about 5 days the stigma begins to develop and the stamens curl away. At the same time the colour deepens until the fully ...
The fringe tree grows from Canada all the way down to the Gulf Coast. It's tougher than dogwood, more dependable than saucer magnolia, longer-lived than cherry, has wonderfully fragrant blooms ...
Boost your curb appeal with these 15 small trees. The best small trees to plant in your front yard attract pollinators and look beautiful year-round.
[5]: 99 Lemmon's draba, (Draba lemmonii), is hairy and mat forming, and covered in clusters of lemon yellow flowers that may look like patches of lichens from a distance, [4]: 224 since it grows in rock crevices and rock ledges. [5] [6]: 224 Its leaves are hairy, but are greener than the typical gray wooly leaves of many alpine plants.