Rattlesnake Master - Eryngium yuccifolium

Features: This is a wonderfully different prairie plant. Its long, pointed leaves resemble a dessert plant such as yucca, the reason for its Latin name. It has unique spherical green flower clusters.

Light: Prefers full sun

Soil: Medium to dry

Height:  2-4 feet.

Blooms: July to August

See more information and photos at: Illinois Wildflowers and USDA Plants Database

Image from 1. Stephanie Walquist, Wild Ones West Cook; 2. Wikimedia