Rattlesnakemaster
(Eryngium aquaticum)
Rattlesnakemaster (Eryngium aquaticum)
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mfeaver
CC BY 4.0
Image By:
mfeaver
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Copyright:
CC BY 4.0
Copyright Notice:
Photo by: mfeaver | License Type: CC BY 4.0 | License URL: http://creativecommons.org/licenses/by/4.0/ | Rights Holder: mfeaver | Publisher: iNaturalist | Date Created: 2020-09-02T11:52:12-07:00 |













Estimated Native Range
Summary
Eryngium aquaticum, commonly known as Rattlesnakemaster, is an evergreen perennial herb native to wet meadows, marshes, and savannas in the coastal Eastern United States. This plant typically grows up to 2 meters tall and has a ribbed, erect stem that branches toward the top. The inflorescence is characterized by its unique appearance, featuring spherical flower heads with white to bluish flowers surrounded by spiny, blue-tinged bracts, blooming from late summer to fall. The flowers are quite showy and attract a variety of pollinators.
Rattlesnakemaster is valued for its striking architectural form and its ability to thrive in wet conditions, making it a suitable choice for rain gardens, water features, and naturalized areas. It is also used in traditional medicine. In cultivation, it prefers full sun to part shade and requires consistent moisture, adapting well to soils with slow or medium drainage. While it is generally low-maintenance, it can be susceptible to root rot if drainage is poor.CC BY-SA 4.0
Rattlesnakemaster is valued for its striking architectural form and its ability to thrive in wet conditions, making it a suitable choice for rain gardens, water features, and naturalized areas. It is also used in traditional medicine. In cultivation, it prefers full sun to part shade and requires consistent moisture, adapting well to soils with slow or medium drainage. While it is generally low-maintenance, it can be susceptible to root rot if drainage is poor.CC BY-SA 4.0
Plant Description
- Plant Type: Herb
- Height: 3-4 feet
- Width: 1-3 feet
- Growth Rate: Moderate
- Flower Color: Blue, Purple, White
- Flowering Season: Fall
- Leaf Retention: Evergreen
Growth Requirements
- Sun: Full Sun, Part Shade
- Water: Medium, High
- Drainage: Medium, Slow
Common Uses
Bee Garden, Bird Garden, Border Plant, Butterfly Garden, Deer Resistant, Drought Tolerant, Erosion Control, Low Maintenance, Rabbit Resistant, Rock Garden, Showy Flowers, Water Garden
Natural Habitat
Native to wet meadows, marshes, and savannas in the coastal Eastern United States
Other Names
Common Names: Water Eryngo , Rattlesnake-Master , Marsh Eryngo , Corn-Snakeroot , Bitter Snakeroot , Marsh Rattlesnake Master , Panicaut Des Tourbières , Kärrmartorn
Scientific Names: Eryngium aquaticum , Eryngium virginianum , Eryngium plukenetii , Eryngium aquaticum var. normale , Eryngium praealtum
GBIF Accepted Name: Eryngium aquaticum L.