# bristle thistle (*Cirsium horridulum*) The bristle thistle is a spiky plant that grows tall and proud. Its bright purple flowers attract butterflies and bees, making it a favorite in gardens and fields. - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 2/5 · Low - **Snaps:** 22 - **Habitat:** Grasslands ![bristle thistle](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Horrible_Thistle_-_Cirsium_horricdulum.JPG&width=800) Photo: MathewTownsend, CC BY-SA 3.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Horrible_Thistle_-_Cirsium_horricdulum.JPG) ## Appearance The bristle thistle is a robust plant with large, deeply lobed leaves covered in sharp spines, making it very distinctive. Its flowers are typically bright yellow or purplish, nestled within a crown of spiny bracts, standing out in sunny areas. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Magnoliopsida - **Order:** Asterales - **Family:** Asteraceae - **Genus:** Cirsium ## Interesting facts - Even though it's spiky, its roots and young stems can be cooked and eaten by people! - Many types of butterflies and bees love to sip nectar from its bright, colorful flowers. - The 'horridulum' in its scientific name actually means 'bristly' or 'prickly' in Latin! - This plant can act as a nurse plant, providing shelter for smaller seedlings underneath its spiny leaves. ## Special abilities - **Spiky Shield:** Bristle thistle has sharp spines covering its leaves and stems that help it defend against hungry animals trying to eat it. - **Deep Drinker:** Bristle thistle can grow a long taproot deep into the soil to help it find water during dry spells and stay firmly anchored. - **Parachute Seeds:** Bristle thistle produces fluffy seeds with parachute-like structures that help them catch the wind and spread far away. ## Measurements & details - **Height:** 30-150 cm - **Spread:** 30-90 cm - **Flower Size:** 2-5 cm - **Bloom Season:** Spring to Summer - **Edible:** Yes - **Toxicity:** None - **Lifecycle:** Biennial - **Pollination Method:** Insect ## Ecological connections - **Pollinates:** Honey Bee (*Apis mellifera*) — collects nectar and pollen - **Eats:** [Painted Lady](https://www.snappit.app/explore/painted-lady) (*Vanessa cardui*) — caterpillars feed on leaves - **Eats:** [American Goldfinch](https://www.snappit.app/explore/american-goldfinch) (*Carduelis tristis*) — feasts on mature seeds - **Pollinates:** Common Eastern Bumblebee (*Bombus impatiens*) — visits flowers for nectar ## Traits - [Flowering](https://www.snappit.app/explore/traits/flowering): Flowering plants are any plants that produce flowers as part of their reproductive cycle. - [Biennial](https://www.snappit.app/explore/traits/biennial): Biennial plants complete their life cycle over two growing seasons, typically forming foliage in the first year and flowering/seeding in the second. - [Summer Blooming](https://www.snappit.app/explore/traits/summer-blooming): Summer blooming plants produce their flowers during the summer season, often providing vibrant color when many other plants have finished. - [Colorful](https://www.snappit.app/explore/traits/colorful): Colorful describes organisms or objects displaying a wide range of bright and distinct colors. - [Grassland](https://www.snappit.app/explore/traits/grassland): Grassland habitats are terrestrial biomes dominated by grasses and herbaceous plants, supporting a variety of grazing animals. - [Pollinator Magnet](https://www.snappit.app/explore/traits/pollinator-magnet): Describes plants that are particularly attractive and beneficial to a wide range of pollinating organisms. - [Spiky/Thorny](https://www.snappit.app/explore/traits/spiky-thorny): Possessing sharp, pointed projections or spines on the body or surface. ## Collections - [Plants](https://www.snappit.app/explore/collections/plants) ## Safety **Danger:** 2/5 · Low Don't touch the sharp leaves without adult help! ## Frequently Asked Questions ### How to identify bristle thistle? Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details. ### How tall is bristle thistle? 30-150 cm ### How wide does bristle thistle spread? 30-90 cm ### How big are the flowers on bristle thistle? 2-5 cm ### When does bristle thistle bloom? Spring to Summer ### Is bristle thistle edible? Yes ### Is bristle thistle toxic? None ### What is bristle thistle's lifecycle? Biennial ## Where to spot - [Cape Lookout Coast Guard Station](https://www.snappit.app/guides/places/cape-lookout-coast-guard-station) — US · Historic Site - [Chambers County Courthouse Square Historic District](https://www.snappit.app/guides/places/chambers-county-courthouse-square-historic-district) — Alabama, US · Historic District - [Charlotte Street Historic District](https://www.snappit.app/guides/places/charlotte-street-historic-district) — Arkansas, US · Historic District - [The Gardens of the American Rose Center](https://www.snappit.app/guides/places/the-gardens-of-the-american-rose-center) — Louisiana, US · Botanical Garden - [Tockwotton-Love Place Historic District](https://www.snappit.app/guides/places/tockwotton-love-place-historic-district) — Georgia, US · Historic District - [Attalla Downtown Historic District](https://www.snappit.app/guides/places/attalla-downtown-historic-district) — Alabama, US · Historic District [View all places to see bristle thistle](https://www.snappit.app/guides/where-to-see/bristle-thistle) ## More Plants - [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*) - [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*) - [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*) - [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) --- Source: [Bristle Thistle: Facts & Places to See — Snappit](https://www.snappit.app/explore/bristle-thistle)