Native Plants

Plant Database

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Cressler, Alan

Prenanthes autumnalis

Prenanthes autumnalis Walter

Slender Rattlesnakeroot

Asteraceae (Aster Family)

Synonym(s): Nabalus autumnalis, Nabalus virgatus, Prenanthes virgata

USDA Symbol: PRAU

USDA Native Status: L48 (N)

A state-listed Endangered species in Maryland.

From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Root Type: Tap
Leaf Complexity: Pinnate
Inflorescence: Raceme , Spike
Size Notes: To about 4 feet in height.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White , Pink , Purple
Bloom Time: Aug , Sep , Oct , Nov
Bloom Notes: Corollas pinkish to lavender to white in color.

Distribution

USA: DE , FL , GA , MD , NC , NJ , SC , VA

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:	FAC				FAC

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Prenanthes autumnalis in USDA Plants
FNA: Find Prenanthes autumnalis in the Flora of North America (if available)
Google: Search Google for Prenanthes autumnalis

Metadata

Record Modified: 2023-01-06
Research By: Joseph A. Marcus

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