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Thistle is the common name of a group of flowering plants characterized by leaves with sharp spikes on the margins, mostly in the family Asteraceae. Prickles can also occur all over the plant – on the stem and on the flat parts of the leaves. These prickles protect the plant from herbivores.
Cirsium palustre is a tall thistle which reaches up to 2 metres (7 ft) in height. The strong stems have few branches and are covered in small spines. In its first year the plant grows as a dense rosette, at first with narrow, entire leaves with spiny, dark purple edges; later, larger leaves are lobed.
Cirsium eriophorum, the woolly thistle, [2] is a herbaceous biennial species of flowering plant in the genus Cirsium of the family Asteraceae. It is widespread across much of Europe. It is a large biennial plant with sharp spines on the tips of the leaves, and long
The plants develop a rosette, with large leaves up to about 40 centimetres (16 inches) long. [6] The seeds are able to germinate between 15 °C to 30 °C, thriving in conditions that offer moist soil and an alternating day/night temperature. [8] A single plant is able to produce around 100 seeds per flower, up to about 20,000 seeds per plant. [8]
It was rated in the top 10 for most nectar production (nectar per unit cover per year) in a UK plants survey conducted by the AgriLand project which is supported by the UK Insect Pollinators Initiative. [10] Marsh thistle, Cirsium palustre, was ranked in first place while this thistle was ranked in sixth place. It also was a top producer of ...
Cirsium neomexicanum is a North American species of thistle known by the common names New Mexico thistle, powderpuff thistle, lavender thistle, foss thistle and desert thistle. [ 2 ] [ 3 ] This plant is native to the southwestern United States and northwestern Mexico , particularly the Mojave and Sonoran Deserts .
Cirsium edule, the edible thistle [2] or Indian thistle, [3] is a species of thistle in the genus Cirsium, native to western North America from southeastern Alaska south through British Columbia to Washington and Oregon, and locally inland to Idaho. [4] It is a larval host to the mylitta crescent and the painted lady. [5]
Cirsium erisithales, the yellow thistle [2] or yellow melancholy thistle, is a perennial herbaceous plant in the tribe Cardueae within the family Asteraceae. [ 3 ] Description