Alberta Invasive Plant Identification Guide

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Thistle, Marsh Cirsium palustre, Asteraceae (Sunflower Family) Category: Prohibited Noxious • Information: May hybridize with Canada Thistle and native marsh thistles. • Life Cycle: Biennial, rosette in the first year, flowers in the second. • Root: Fibrous root system. • Leaves: Leaves covered with long sticky hairs, lobed, 15-20cm long. • Stems: 1-1.5m tall, branched at top, thick, reddish in color, covered in long sticky hairs. • Flower: Many flowers per plant, purple, bracts spineless. • Seed/Fruits: Small, hard, elongated, tuft of bristles (pappus) for seed dispersal. • Toxicity: • Control: Control in first year (rosette stage) or before seed set. 48 All: http://dnr.wi.gov/invasives/pdfs/WI%20inv%20plant%20field%20guide%20web%20version.pdf
Thistle, Nodding Carduus nutans, Asteraceae (Sunflower Family) Category: Prohibited Noxious • Information: Native to Europe, also known as Musk Thistle, is often a weed of rangelands. • Life Cycle: Biennial, large rosette leaves in the first years growth, flowers in the second. •Root: Fleshy taproot. • Leaves: Clasping, alternately arranged on the stem, spines along edge, hairy, sometimes pinkish, wavy edge. • Stems: Spines along stem, 20cm - 2.5m tall, hairy. • Flower: Large, nodding, purple, large thorny bracts are below the flower. • Seed/Fruits: Pappus present, each flower head may produce up to 1200 seeds. • Toxicity: • Control: hand pick, chemical control before seed set. http://www.invasiveplants.ab.ca/Downloads/FS-NoddingThistle.pdf 49 All: www.invasiveplants.ab.ca/
Page 1 and 2: Alberta Invasive Plant Identificati
Page 3 and 4: Alberta Invasive Plant Identificati
Page 5 and 6: Alberta Weed Control Act Legislatio
Page 7 and 8: White Flowers Scentless Chamomile P
Page 9 and 10: Yellow Flowers Hawkweed spp. Pg. 24
Page 11 and 12: Prohibited Noxious Weeds Prohibited
Page 13 and 14: Balsam, Himalayan Impatiens glandul
Page 15 and 16: http://commons.wikimedia.org/wiki/F
Page 17 and 18: Montana State University Invasive P
Page 21 and 22: Flowering Rush Butomus umbellatus,
Page 23 and 24: USDA APHIS PPQ Archive, USDA APHIS
Page 25 and 26: Michael Shephard, USDA Forest Servi
Page 27 and 28: Donna R. Ellis, University of Conne
Page 29 and 30: Knapweed, Bighead Centaurea macroce
Page 35 and 36: knapweed, Squarrose Centaurea virga
Page 37 and 38: Knotweed Complex Fallopia spp./ Pol
Page 39 and 40: Steve Dewey, Utah State University,
Page 41 and 42: Puncturevine Tribulus terrestris, Z
Page 43 and 44: Rush Skeletonweed Chondrilla juncea
Page 45 and 46: Saltlover Halogeton glomeratus, Che
Page 47: Starthistle, Yellow Centaurea solst
Page 51 and 52: Noxious Weeds Noxious Weeds have th
Page 53 and 54: Bellflower, Creeping Campanula rapu
Page 55 and 56: Blueweed Echium vulgare, Boraginace
Page 57 and 58: Brome, Japanese Bromus japonicas, P
Page 59 and 60: Buttercup, Tall Ranunculus acris, R
Page 61 and 62: Clematis, Yellow Clematis tangutica
Page 63 and 64: Oxeye Daisy Leucanthemum vulgare, A
Page 65 and 66: Henbane, Black Hyoscyamus niger, So
Page 67 and 68: Hound’s‑Tongue Cynoglossum offi
Page 69 and 70: Life cycle: Perennial. Root: Deep
Page 71 and 72: Sow thistle, Perennial Sonchus arve
Page 73 and 74: Tansy, Common Tanacetum vulgare, As
Page 75 and 76: Toadflax, Dalmatian Linaria dalmati
Page 77 and 78: Glossary adventitious roots Roots a
Page 79 and 80: Weed Websites Alberta Invasive Plan
Page 81: Produced by Wheatland County For mo

Alberta Invasive Plant Identification Guide

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