# Leavenworth's Eryngo (*eryngium leavenworthii*) Leavenworth's Eryngo (Eryngium leavenworthii) is a striking, thistle-like annual plant native to the grasslands and prairies of the south-central United States. Known for its vibrant purple to almost neon violet coloration, this plant stands out dramatically in late summer and autumn fields. Despite its prickly appearance, it is actually a member of the Apiaceae (carrot) family, and it plays a vital role in its local ecosystem by attracting a wide variety of native pollinators. Its unique structure and robust nature make it a favorite for native plant enthusiasts and floral designers alike. - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 1/5 · Very low - **Snaps:** 2 - **Habitat:** Typically found in dry, open prairies, limestone glades, rocky barrens, and along sunny roadsides with calcium-rich soils. ![Leavenworth's Eryngo](https://inaturalist-open-data.s3.amazonaws.com/photos/2510140/medium.jpg) Photo: USFWS Mountain-Prairie, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/2510140) ## Appearance This upright annual typically grows between 50 to 100 cm tall, featuring heavily branched, spiny stems. The most defining feature is its dense, cone-like flower heads, which are tightly packed with tiny, bright purple flowers, sitting atop a collar of sharply pointed, leaf-like bracts. The entire upper portion of the plant, including the stems and leaves, turns a brilliant, metallic shade of purple or amethyst as it matures in late summer, creating an eye-catching contrast with surrounding green or brown prairie grasses. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Magnoliopsida - **Order:** Apiales - **Family:** Apiaceae - **Genus:** Eryngium ## Interesting facts - Despite looking almost exactly like a thistle, it is actually a member of the carrot and celery family. - Its brilliant purple color acts as an optical beacon, reflecting UV light to guide bees directly to its nectar reservoirs. - The spiky blooms retain their vivid amethyst color long after drying, making them highly prized in dry flower arrangements. ## Special abilities - **Arid Heat Tolerance:** Utilizes a deep taproot and a waxy, moisture-retaining cuticle to survive the intense heat and dry conditions of late summer in the southern plains. - **Prickly Herbivore Deterrent:** Possesses sharp, spine-tipped leaves and bracts that discourage grazing mammals from feeding on its foliage and flowers. - **UV-Reflective Nectar Guides:** Employs highly intense purple coloration that stands out in the ultraviolet spectrum, making it exceptionally visible to pollinating insects from a distance. ## Measurements & details - **Length:** 50-100 cm - **Lifespan:** 1 years ## Diet & Feeding As a photosynthetic plant, it generates its own energy from sunlight, water, and carbon dioxide, while absorbing essential minerals through its root system. - **Primary Foods:** Sunlight, Carbon dioxide, Water, Soil nutrients ## Ecological connections - **Mutualism:** [Monarch Butterfly](https://www.snappit.app/explore/monarch-butterfly) (*Danaus plexippus*) — Provides abundant nectar during late summer, serving as a vital food source for migrating butterflies. - **Mutualism:** American Bumblebee (*Bombus pensylvanicus*) — Attracts native bumblebees for pollination, aiding in the plant's reproduction while providing nutrient-rich nectar. - **Eaten by:** [White-tailed Deer](https://www.snappit.app/explore/white-tailed-deer) (*Odocoileus virginianus*) — Occasionally browsed by herbivores when the plant is young and the protective spines have not yet hardened. ## Safety **Danger:** 1/5 · Very low No special safety notes yet. ## Frequently Asked Questions ### How to identify Leavenworth's Eryngo? 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 long is Leavenworth's Eryngo? 50-100 cm ### How long does Leavenworth's Eryngo live? 1 years ### What does Leavenworth's Eryngo eat? As a photosynthetic plant, it generates its own energy from sunlight, water, and carbon dioxide, while absorbing essential minerals through its root system. ### Where is Leavenworth's Eryngo usually found? Typically found in dry, open prairies, limestone glades, rocky barrens, and along sunny roadsides with calcium-rich soils. ## Where to spot - [Shackelford County Courthouse Historic District](https://www.snappit.app/guides/places/shackelford-county-courthouse-historic-district) — Texas, US · Historic District - [Holy City of the Wichitas Historic District](https://www.snappit.app/guides/places/holy-city-of-the-wichitas-historic-district) — Oklahoma, US · Historic District ## 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: [Leavenworth's Eryngo: Facts & Places to See — Snappit](https://www.snappit.app/explore/leavenworths-eryngo)