Sánchez Escalante José Jesús, Jesús Pablo Carrillo León and Jorge Orel Cruz-Zagasta. Identification Leaves: First-year rosettes are spiny, long, deeply lobed and hairy on … The siphunculi are 0.25-0.34 times the body length, and 1.6-2.2 times the length of the cauda, with polygonal reticulation on less than the distal 0.25 of their length. Water management/use, Livestock ranching/farming. Thistles will produce a variety of different coloured flowers – mostly purple to mauve and even yellow. and borage (Boraginaceae). In any case, the spiny stem indicates a non-native thistle and it's best to eradicate it, no matter what species it is. Abdominal hairs are placed on pigmented scleroites. It is found across Europe to the Middle East and much of Asia. Capitula in dense, racemose clusters of 2–8.
Common names are from state and federal lists. Prefers moist, acidic soils and is somewhat shade tolerant.
Apterae often, and immatures very often, have discrete white wax spots. View European marsh thistle pictures in our photo gallery! Marsh thistle has never really adapted to live on pasture land, however, and it is not spiny enough to avoid being eaten by cows and horses. Pacific Northwest Exotic Pest Plant Council, 1998, The University of Georgia - Center for Invasive Species and Ecosystem Health, National Association of Exotic Pest Plant Councils. Apterae in spring populations are pale green. and a few other species of Asteraceae, but not generally on other thistles. Fruit: Elliptic, flattish, glossy, shiny, 3–4 mm (0.12–0.16 in.) The stem of the shore thistle is winged and spinous throughout. Roth, D. 2019.
It is found over most of the temperate and warm temperate parts of the world. First thistle to Flower In the Summers The marsh thistle is the first thistle to flower in the summer. Spontaneous hybrids between European marsh thistle and Canada thistle have been reported from European countries. The siphunculi have no distal reticulation and are without dark apices. Common name: Marsh Thistle Latin name: Cirsium palustre Family: Daisy (Asteraceae) Flowers: July to September Date: 28 June Location: Braunton Burrows, Devon … The thistle oleaster aphid does not host alternate.
It spreads easily, however, on land that has been affected by people and to damp habitats that have been created, such as roadside ditches, field banks and neglected lawns. Some assistance on identification of common thistles is given below. The siphunculi are reticulated over the distal 0.16-0.27 of their length and are 1.3-1.8 times the length of the cauda. Cirsium wrightii - Wright's marsh thistle: a 2012 population assessment.
The antennae have joints of III-IV and base of V usually quite pale. Wright's marsh thistle, Cirsium wrightii. It is tall (up to 2.5 m), and has a strict growth form. Luis Encinas Johnson, Col. Centro Hermosillo, Sonora, México. The plum-thistle aphid is found throughout Britain and Europe as well as in Asia, north Africa and North America. The slightly dusky cauda has 20-33 hairs. Photos courtesy Peter M. Dziuk taken in Cook County and in Wisconsin. The globe thistle has divided prickly dark green leaves which are whitish beneath and rounded, violet-blue flower heads (not yet out in the picture) on silvery branched stems. Involucre hemispherical, involucral bracts erect, tips with short spines, reddish brown. Populations in the city of Roswell, Chavez County, at Lake Valley, Sierra County, and at San Bernardino Cienega in Arizona appear to be extirpated. It's been recognized as a prohibited weed in Wisconsin for some years but ignored in Minnesota, likely because it hadn't been seen in the state. Flower: Single flower-like 1–1.5 cm capitula surrounded by involucral bracts. Presidio County, Texas; Chihuahua, Mexico. Another subspecies of the black bean aphid (Aphis fabae solanellae ), now sometimes given specific status, is also found on thistle. Once introduced, this plant can aggressively colonize natural areas, decrease biodiversity and compromise the ecological integrity of an area. Final report. Well, now it's here. Albuquerque, NM: New Mexico Rare Plants Home Page. Capitophorus carduinus (Thistle oleaster aphid)
Dispersed by the wind. The greater knapweed (Centaurea scabiosa) (below second) is mainly found in chalk grassland. It can be differentiated from Aphis fabae cirsiiacanthoidis by the length of hairs on the antenna and hind femur. Your Name:
PLANTS Identification Keys: Plant Materials Web Site: Plant Materials Publications ... Cirsium palustre (L.) Scop. Comment (max 1000 characters): Note: Comments or information about plants outside of Minnesota and neighboring states may not be posted because Id like to keep the focus of this web site centered on Minnesota. Nesom, Guy L. 2018. The flowers of the creeping thistle are small and purple and at the tips of the stems. Leaf bases extend down the stem creating spine-tipped “wings” that are very sharp. The longest femoral and tibial hairs are longer than the least width of tibiae. Marsh Thistle is fairly easy to recognize, even passing by at 60 mph. An email address is required, but will not be posted—it will only be used for information exchange between the 2 of us (if needed) and will never be given to a 3rd party without your express permission.
The terminal process of the antenna is 4.6-6.3 times the length of the base of the last antennal segment. The leaves and outer bracts are spinous and the inner bracts are whitish, spreading like rays. → Distribution map
Aphis fabae solanellae has the longest hair on the third antennal segment 15-25 um and the longest hair on the hind femur 45-70 um. In many tropical and subtropical countries it may reproduce parthenogenetically all year round. Hover over the pictures for more information. Cabbage Thistle,
C. wrightii sometimes occurs with the threatened Cirsium vinaceum in the Sacramento Mountains where a few hybrids between these rare taxa have been observed.
Marsh thistle suffers greatly in its youth from the harsh conditions and only a small proportion of them ever flower. Marsh Thistle Marsh Thistle - Cirsium palustre. Gray, A. Protection/exclosures for existing spring habitat. All rights reserved. The common knapweed has the leaves of the upper stem lanceolate, and the bract appendages blackish concealing the base. The leaves are decurrent and spinous and the flower heads are clustered.
Robust biennial or monocarpic perennial; stem strict, 1-2.5 m tall; basal leaves ample, succulent, 30 cm or more long, sinuate or pinnatifid, weakly prickly with short black spines, nearly glabrous, the thin weblike wool tardily deciduous; stem leaves similar, sessile, strongly decurrent, gradually reduced in size up the stem; heads terminating thin branches in naked panicles, hemispherical, 2-3 cm across; phyllaries small, somewhat glandular with papillose projections on upper surface; outer phyllaries subulate, cuspidate-tipped; corollas white or pink; style tips about 3 mm long.