Carduus is a genus of flowering plants in the family Asteraceae, and the tribe Cardueae, one of two genera considered to be true thistles, the other being Cirsium. [2] Plants of the genus are known commonly as plumeless thistles .

Carduus nutans is a biennial plant in the daisy and sunflower family Asteraceae with the common names musk thistle, [1] nodding thistle, and nodding plumeless thistle. It is native to regions of Europe, Central Asia, and North Africa, where it is a scattered pasture plant.

Plumeless Thistle resembles Bull Thistle (Cirsium vulgare), whose flowers are larger and leaves hairier, but is more closely related to Nodding Thistle (Carduus nutans), whose flowers are also larger and have broad showy bracts. The spiniest of all thistles in the state, Plumeless Thistle is on the noxious weed list for Minnesota and a relative ...

Carduus is a genus of flowering plants in the aster family, Asteraceae, and the tribe Cynareae, one of two genera considered to be true thistles, the other being Cirsium. Plants of the genus are known commonly as plumeless thistles.

Carduus thistles are winter annuals or biennials with prickly leaves and stems with prickly wings. Plumeless thistle and musk thistle grow to 5 ft tall. They are closely related and may hybridize. Italian thistle and slenderflower thistle are also closely related and can grow to 6.5 ft tall. All these thistles form deep taproots.

Carduus nutans. Other Common Names. Nodding Plumeless Thistle Plant Category. Biennial Invasive Description. Native to Eurasia, Musk Thistle was possibly accidentally introduced in 1852 through ballast water. It is an aggressive, spiny plant with showy red-purple flower heads that droop or nod. It resembles several native thistles.

Carduus pycnocephalus, with common names including Italian thistle, Italian plumeless thistle, and Plymouth thistle, [1] is a species of thistle. It is native to the Mediterranean region in southern Europe, North Africa, and Western Asia; Eastern Europe and the Caucasus; and the Indian Subcontinent. [2]

Carduus cinereus is new to North America. A revised key to the species of Carduus in North Americais presented. Key Words: Asteraceae, Carduus cinereus, taxonomy, non-native, invasive species. Carduus L. comprises about 90 species from Eurasia and northern Africa, mainly in the Mediter-ranean region (Susanna and Garcia-Jacas 2007).

[Wikipedia] Origins: Carduus pycnocephalus, with common names including Italian thistle, Italian plumeless thistle, and Plymouth thistle, is a species of thistle. It is native to: the Mediterranean region in southern Europe, North Africa, and Western Asia; East Europe and the Caucasus; and the Indian Subcontinent.

Carduus crispus: undersurface of leaves with two types of hairs: longer, curling, septate hairs on the veins and sparse, woolly hairs inbetween (vs. C. anthoides, with the undersurface of leaves with only type of hair: curling and septate).