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PlantFiles: Rattlesnake Fern
Botrychium virginianum

Family: Ophioglossaceae
Genus: Botrychium (boh-TRY-kee-ee-um) (Info)
Species: virginianum (vir-jin-ee-AN-um) (Info)

Synonym:Botrychium brachystachys
Synonym:Botrychium charcoviense
Synonym:Botrychium cicutarium
Synonym:Botrychium dichronum
Synonym:Osmunda virginiana

6 members have or want this plant for trade.


6-12 in. (15-30 cm)
12-18 in. (30-45 cm)

Unknown - Tell us

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Light Shade

Unknown - Tell us

Bloom Color:

Bloom Time:

Grown for foliage

Other details:
Unknown - Tell us

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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to view:

By kennedyh
Thumbnail #1 of Botrychium virginianum by kennedyh

By kennedyh
Thumbnail #2 of Botrychium virginianum by kennedyh

By Toxicodendron
Thumbnail #3 of Botrychium virginianum by Toxicodendron

By ViolaValley
Thumbnail #4 of Botrychium virginianum by ViolaValley

By bottlegreen
Thumbnail #5 of Botrychium virginianum by bottlegreen


No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral Cretaceous On Mar 24, 2007, Cretaceous from El Sobrante, CA (Zone 9b) wrote:

This fern is native to all of the USA (except Hawaii), Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Panama, Bolivia, Ecuador, Peru, and the Dominican Republic.

This plant is hard to find in nurseries. It is listed as exploitably vulnerable in the state of New York.

Neutral frostweed On Jan 12, 2007, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Rattlesnake Fern Botrychium virginianum is Native to Texas and other States.


This plant has been said to grow in the following regions:

Rome, Georgia
Saint Paul, Minnesota
Water Valley, Mississippi
Piedmont, Missouri
Williamsburg, Ohio
Tidioute, Pennsylvania
Wilkes Barre, Pennsylvania
Summerville, South Carolina
Viola, Tennessee
Shepherd, Texas
Blacksburg, Virginia

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