Plant Image
Willow Dells Tr - SS

Yavapai County Native & Naturalized Plants

Marrubium vulgare - horehound

Plant Form: Forb

Family: Lamiaceae

line decor
Home Plant Communities Plant List Search Forbs Search Grasses Search Woody Plants, Succulents, Cacti Additional Resources About this Website
line decor

Click on Any Image for a Larger View

Willow Dells Tr
Plant - summer
Willow Dells Tr
Plant - summer
Willow Dells Tr
Forb Plant Description

Origin: Introduced   Life Cycle: Perennial
General Desc: Weedy perennial herb introduced from Europe for medicinal uses and as a flavoring for horehound candy. Horehound is now naturalized in the U.S. The calyces of horehound have 10 hooked teeth and will readily stick to clothing and the fur of animals.
Height: Erect to 3 feet


Habitat Description: Disturbed places, roadsides, fields and pastures at most elevations.
Plant Communities: Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest, Riparian, Disturbed Areas
Elevation: 1000 - 8100 feet

Flower Characteristics

Color: White     Shape: Irregular in round clusters     Tubular: Y     Flowering Period: Apr - Sep
Description: Tiny white flowers are to 1/4 inch long in whorls around the stem in leaf axils.

Leaf and Stem Characteristics

Leaf Color: Grayish-green     Leaf Type: Simple     Leaf Shape: Triangular     Leaf Margin: Toothed     Leaf Attachment: Opposite     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves are to 2 inches long. They have a crinkly surface above and are white-woolly beneath. They are found in pairs on the stem below each flower whorl.

Fruit and Seed Characteristics

Fruit Color: Brown   
Fruit Type: Nutlet
Fruit Notes: Black to dark brown nutlet.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 3.1  
Last Updated: June 15, 2013  
Content Questions/Comments: Email Jeff Schalau  
Legal Disclaimer