(Stachys pilosa var. arenicola)

Conservation Status
  IUCN Red List

not listed


NNR - Unranked

SNR - Unranked


not listed

Wetland Indicator Status
  Great Plains

FACW - Facultative wetland


FACW - Facultative wetland

  Northcentral & Northeast

FACW - Facultative wetland


Woundwort is a 12 to 40 tall, erect, perennial forb that rises from a rhizome. It often forms colonies.

The stems are erect, square, hollow, and usually unbranched. They have copious hairs both on the ridges of the stem and between the ridges. The hairs on the ridges and those between the ridges are about alike and are somewhat bent downward.

The leaves are opposite, narrowly oblong or linear oblong, 1 to 3½ long, and to ¾ wide, rarely wider. They are mostly stalkless but some may be on short leaf stalks. The leaf blades taper to a point at the tip and are broadly rounded or almost heart-shaped at the base. The upper surface is green and hairy. The lower surface is paler green and has hairs along the major veins. The margins have rounded, forward-pointing teeth.

The inflorescence is a cluster of usually 6 flowers. Lower clusters rise from the upper leaf axils. Middle and upper clusters are opposite and are subtended by a small, leaf-like bract. Each pair of opposite flower clusters together form a false whorl. The bracts become gradually smaller as they ascend the stem.

The flowers are 7 16 to long. They have 5 green or purplish, hairy sepals that are fused at the base into a calyx tube ¼ to long and separated at the end into 5 lance-shaped lobes. The calyx lobes are nearly as long as the calyx tube and are hairy. There are 5 petals that are fused at the base into a corolla tube about ¼ long. The petals are pink or lavender with white spots. The calyx tube is always at least as long as the corolla tube. The corolla is divided at the end into 2 lips. The upper lip is about 3 16 long and wide, hood-like, hairy outside, hairless inside. The lower lip is divided at the tip into 3 lobes, a large central lobe and 2 smaller lateral lobes. There are 4 stamens protected beneath the hood.

The fruit is 4 greenish-white, 3-ribbed, 1-seeded nutlets. They turn black when they ripen.




12 to 40


Flower Color


Pink or lavender with white spots


Similar Species


American germander (Teucrium canadense) flowers have a greatly reduced upper lip.

Hairy hedge nettle (Stachys hispida) stems have hairs on the ridges but no hairs between the ridges.

Marsh hedge nettle (Stachys palustris) stems have hairs on the ridges that are distinctly longer than those between the ridges. The leaves are wider, mostly ¾ to 1½ wide.

Smooth hedge nettle (Stachys tenuifolia) stems have hairs on the ridges but no hairs between the ridges. The leaves may have hairs along the midribs but are otherwise hairless.


Moist to wet.




July to August




Distribution Map



4, 7.









  Kingdom Plantae (green algae and land plants)  
  Subkingdom Viridiplantae (green plants)  
  Infrakingdom Streptophyta (land plants and green algae)  
  Superdivision Embryophyta (land plants)  
  Division Tracheophyta (vascular plants)  
  Subdivision Spermatophytina (seed plants)  
  Class Magnoliopsida (flowering plants)  
  Superorder Asteranae  


Lamiales (mints, plantains, olives, and allies)  


Lamiaceae (mint)  
  Subfamily Lamioideae  
  Tribe Stachydeae  
  Genus Stachys (hedge nettles)  
  Species Stachys pilosa (hairy hedge nettle)  

There is some disagreement about the number and classification of Minnesota’s Stachys species. The classification used on MinnesotaSeasons.com follows ITIS and USDA PLANTS.




Stachys arenicola

Stachys homotricha

Stachys palustris var.arenicola

Stachys palustris var. homotricha

Stachys palustris var. phaneropoda

Stachys palustris ssp.arenicola


Common Names


hairy hedgenettle

hairy hedge-nettle













Modified leaf at the base of a flower stalk, flower cluster, or inflorescence.



The group of outer floral leaves (sepals) below the petals, occasionally forming a tube.



A collective name for all of the petals of a flower.



Long, straight, and narrow, with more or less parallel sides, like a blade of grass.



A horizontal, usually underground stem. It serves as a reproductive structure, producing roots below and shoots above at the nodes.



An outer floral leaf, usually green but sometimes colored, at the base of a flower.

Visitor Photos

Share your photo of this plant.

This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach one or more photos and, if you like, a caption.

MinnesotaSeasons.com Photos





  Stachys palustris homotricha WOUNDWORT
Frank Mayfield
  Stachys palustris homotricha WOUNDWORT  



Visitor Videos

Share your video of this plant.

This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach one or more videos or YouTube links and, if you like, a caption.

Other Videos



Last Updated:

About Us | Privacy Policy | Contact Us | © MinnesotaSeasons.com.com. All rights reserved.