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Calycadenia is a genus of flowering plants in the family Asteraceae, [1] [2] known commonly as the western rosinweeds. [3] They are native to California , especially around the Central Valley . [ 4 ]
Thlaspi arvense is a foetid, hairless annual plant, growing up to 60 cm (24 in) tall, [2] with upright branches. The stem leaves are arrow-shaped, narrow and toothed. It blooms between May and July, with racemes or spikes of small white flowers that have 4 sepals and 4 longer petals. [3]
Hieracium albiflorum, known by the names white hawkweed and white-flowered hawkweed, is a common and widespread species of plant in the family Asteraceae. Hieracium albiflorum is found in western North America, from Alaska and the Northwest Territories south to Mexico ( Chihuahua , Sonora ) and east to Manitoba and the Black Hills of South Dakota .
The first step to removing weeds from your lawn and garden is identification. Learn about 20 common types of weeds and how to treat them.
Calycadenia multiglandulosa is a species of flowering plant in the family Asteraceae, known by the common names sticky calycadenia [3] and sticky western rosinweed. [4] It is endemic to California , where it is a common in the Coast Ranges and in the Sierra Nevada Foothills from Shasta County to Kern County .
The seeds are burs, and are very sticky. The plant is native but a well-known nuisance in deciduous forests of the eastern U.S. because the seeds can be difficult to remove from clothing and especially pet fur. [8] [9] The seeding part of the plant—the upper stem—dies earlier than most other plants, and becomes very brittle. Often the ...
The flowers are clustered in groups of two or three, and are borne out of the leaf axils. [13] The corolla bears 4 petals. [14] The globular fruits are burrs which grow one to three seeds clustered together; they are covered with hooked hairs which cling to animal fur and human clothing, aiding in seed dispersal. [13]
Ageratum (/ ə ˈ dʒ ɛr ə t ə m /) [2] (whiteweed in the US) is a genus of 40 [3] to 60 tropical and warm temperate flowering annuals and perennials from the family Asteraceae, tribe Eupatorieae. Most species are native to Central America and Mexico but four are native to the United States. [3] They form tussocks or small hills.