Cirsium arvense


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Related to Cirsium arvense: creeping thistle

Cirsium arvense

plant member of the family Asteraceae; may cause nitrate-nitrite poisoning. Called also Canada thistle.
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Of the exotic perennials, Cirsium arvense was most abundant at the Yellowstone Lake location, reaching mean densities of ~1100 stems/ha, whereas Lactuca serriola did not differ in density among locations (Table 8).
Vaccinium scoparium, Epilobium angustifolium, Lupinus argenteus, and Arnica cordifolia) Opportunistic species Lowest density of native annuals Gayophytum diffusum and Collinsia parviflora; highest density of exotic Cirsium arvense Plant species richness High
Cirsium arvense was detected in two of the three sample areas, with a mean density of 0.
Invasive species collected at Howell Wetlands include, Cirsium arvense L.
retroflexus, Arctium minus, Arenaria serpyllifolia, Barbarea vulgaris, Brassica nigra, Capsella bursa-pastoris, Centaurea mnaculosa, Cerastium vulgatum, Chrysanthemum leucanthemum, Cichorium intybus, Cirsium arvense, Conium maculatum, Convolvulus arvensis, Datura stramonium, Daucus carota, Dianthus armeria, Dipsacus sylvestris, Draba verna, Froelichia gracilis, Geranium pusillum, Glechoma hederacea, grasses [Bromus commutatus, Bromus inermis Bromus japonicus, Bromus racemosa, Bronus tectorum, Dactylis glomerata, Digitaria ischaemum, Eleusine indica, Elytrigia repens, Eragrostis cilianensis, Lolium perenne var.
Seeds of Pitcher's thistle at the soil surface may have suffered moisture stress, known to reduce germination of Cirsium arvense (Wilson, 1979).
Despite its high species richness, much of the open area of Gymnopilus Meadow is covered with Cirsium arvense from mid to late summer.
Resource limitation and offspring size and number trade-offs in Cirsium arvense (Asteraceae).