Eryngium yuccifolium Michx.
Button eryngo, Button snakeroot, Rattlesnake master, Beargrass, Bear's grass
Apiaceae (Carrot Family)
USDA Symbol: ERYU
Scattered along the stiff, upright stem of this unusual perennial are tough, blue-green, yucca-like, parallel-veined leaves. Smooth, rigid stem bearing thistle-like flower heads made up of small greenish-white florets mingled with pointed bracts. The individual, greenish-white flowers cluster into unique, globular heads. These occur on branch ends atop the 6 ft. plant.
Their spiny leaves make walking through clumps of these plants difficult, and also make them unpalatable to grazing livestock. They were once credited with a variety of curative powers. Their flower heads develop a bluish cast with maturity.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Size Notes: 4-6 feet.
Flower: Flowers in 1 inch globes
Size Class: 3-6 ft.
Bloom InformationBloom Color: White
Bloom Time: May , Jun , Jul , Aug
DistributionUSA: AL , AR , CT , FL , GA , IA , IL , IN , KS , KY , LA , MD , MI , MN , MO , MS , NC , NE , NJ , OH , OK , SC , TN , TX , VA , WI
Native Distribution: FL to coastal & blackland prairies in TX, n. to NJ, w. IN, s. MN & NE
Native Habitat: Prairies; sandy roadsides; open woods
Growing ConditionsWater Use: Medium
Light Requirement: Sun
Soil Moisture: Moist
Soil Description: Various well-drained soils.
Conditions Comments: Rattlesnake master can be an aggressive self-seeder. Remove seed heads to keep the plant in check. Scattered along the stiff, upright stem of this unusual perennial are tough, blue-green, yucca-like, parallel-veined leaves. Smooth, rigid stem bearing thistle-like flower heads made up of small greenish-white florets. The individual, greenish-white flowers cluster into unique, globular heads. Their spiny leaves make walking through clumps of these plants difficult.
BenefitUse Ornamental: Bog or pond area, Water garden
Conspicuous Flowers: yes
Value to Beneficial InsectsSpecial Value to Native Bees
Supports Conservation Biological Control
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationDescription: Usually propagated by seed planted outdoors in fall or stored, stratified and planted in spring. Mature plants can be divided in late spring or early fall.
Seed Collection: Collect seed in fall when the seed heads have turned brown. Tap the seed out of the heads and air-dry, storing with the chaff in sealed, refrigerated containers.
Seed Treatment: Cold-moist stratify at 40 degrees for 2 months.
Commercially Avail: yes
Find Seed or Plants
Order seed of this species from Native American Seed and help support the Wildflower Center.
Find seed sources for this species at the Native Seed Network.
View propagation protocol from Native Plants Network.
National Wetland Indicator Status
From the National Suppliers DirectoryAccording to the inventory provided by Associate Suppliers, this plant is available at the following locations:
Enchanter's Garden - Hinton, WV
Ohio Prairie Nursery - Hiram, OH
American Native Nursery - Quakertown, PA
Toadshade Wildflower Farm - Frenchtown, NJ
Prairie Nursery - Westfield, WI
Far South Wholesale Nursery - Austin, TX
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Delaware Nature Society - Hockessin, DE
Stengl Biological Research Station - Smithville, TX
Native Seed Network - Corvallis, OR
BibliographyBibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski
Bibref 946 - Gardening with Prairie Plants: How to Create Beautiful Native Landscapes (2002) Wasowski, Sally
Bibref 765 - McMillen's Texas Gardening: Wildflowers (1998) Howard, D.
* The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.
Bibref 328 - Wildflowers of Texas (2003) Ajilvsgi, Geyata.
Search More Titles in Bibliography
Additional resourcesUSDA: Find Eryngium yuccifolium in USDA Plants
FNA: Find Eryngium yuccifolium in the Flora of North America (if available)
Google: Search Google for Eryngium yuccifolium
MetadataRecord Modified: 2013-09-11
Research By: TWC Staff