Cirsium arvense (L.) Scop.
Canada thistle
Kingdom | Plantae | Plants, but not fungi, lichens, or algae |
Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
Division | Magnoliophyta | Flowering plants, also known as angiosperms |
Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
Subclass | Asteridae | A large class that encompasses asters |
Order | Asterales | Flowering plants with a central disk flower and surrounding petals, like daisies |
Family | Asteraceae | The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers |
Genus | Cirsium | From Greek kirsion, “a kind of thistle” |
Species | arvense | Of the fields |
About plant names...
[An article has not been written yet.]
7/18/2020 · Woodward Point Preserve, Brunswick, Maine · ≈ 4 × 6″ (10 × 15 cm)
9/15/1995 · Brier Island, Nova Scotia · By Constance B. Kent
7/18/2020 · Woodward Point Preserve, Brunswick, Maine · ≈ 7 × 4½″ (18 × 12 cm)
7/18/2020 · Woodward Point Preserve, Brunswick, Maine · ≈ 10 × 6″ (24 × 16 cm)
7/2/2010 · Stansbury Mill Rd, Phoenix, Maryland · ≈ 4½ × 3″ (11 × 7.9 cm)
Breea arvensis (L.) Less.
Breea incana (S.G. Gmel.) W.A. Weber, ined.
Carduus arvensis (L.) Robson
Cirsium arvense (L.) Scop. var. argenteum (Vest) Fiori
Cirsium arvense (L.) Scop. var. horridum Wimm. & Grab.
Cirsium arvense (L.) Scop. var. integrifolium Wimm. & Grab.
Cirsium arvense (L.) Scop. var. mite Wimm. & Grab.
Cirsium arvense (L.) Scop. var. vestitum Wimm. & Grab.
Cirsium incanum (S.G. Gmel.) Fisch. ex M. Bieb.
Cirsium setosum (Willd.) Besser ex M. Bieb.
Serratula arvensis L.
Cirsium arvense description by Thomas H. Kent, last updated 23 Sep 2021.
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7/17/2021 · Wilbur Preserve, Cox’s Head, Phippsburg, Maine · ≈ 6 × 3½″ (14 × 9.4 cm)
7/17/2021 · Wilbur Preserve, Cox’s Head, Phippsburg, Maine · ≈ 6 × 3½″ (14 × 9.4 cm)
7/18/2020 · Woodward Point Preserve, Brunswick, Maine · ≈ 4½ × 7″ (12 × 18 cm)
7/17/2021 · Wilbur Preserve, Cox’s Head, Phippsburg, Maine · ≈ 6 × 4″ (15 × 10 cm)
7/2/2010 · Stansbury Mill Rd, Phoenix, Maryland · ≈ 6 × 9″ (14 × 22 cm)
7/18/2020 · Woodward Point Preserve, Brunswick, Maine · ≈ 4½ × 7″ (12 × 18 cm)
Range:
About this map...
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