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Cirsium horridulum Michx.
Purple 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 | horridulum | Very prickly or bristly |
About plant names...
[An article has not been written yet.]
Cirsium horridulum description by Thomas H. Kent, last updated 25 May 2020.
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4/11/2015 · Loop Road, Big Cypress National Preserve, Florida · ≈ 2 × 1½′ (65 × 43 cm) 
4/14/2015 · Long Pine Key, Everglades National Park, Florida · ≈ 2½ × 1½′ (79 × 53 cm)
4/11/2015 · Loop Road, Big Cypress National Preserve, Florida · ≈ 3 × 2′ (101 × 67 cm)
Range:
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