Species Detail Forb

Flower Willow Dells Tr - Sue Smith		Yavapai County Native & Naturalized Plants Marrubium vulgare - horehound Other Common Names: white horehound Plant Form: Forb or Subshrub Family: Lamiaceae
Flower Willow Dells Tr - Sue Smith


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Leaves Willow Dells Tr Sue Smith	Plant - summer Willow Dells Tr Sue Smith	Plant - summer Willow Dells Tr Sue Smith

Forb Plant Description

Origin: Introduced Life Cycle: Perennial
General Desc: Rounded, bushy plant with white woolly stems and wrinkled leaves. Flower bracts have 10 hooked teeth and will readily stick to clothing and the fur of animals.
Identification notes: Taprooted perennial, stems trailing to ascending. Plant is densely woolly and pungent. Leaves wrinkled, opposite, thick and rounded with crinkled edges. Flowers are whitish, whorled in rounded clusters in leaf axils with spiny sepals. Fruit is a nutlet.
Height: To 3 feet

Habitat

Habitat Description: Disturbed places, roadsides, fields and pastures.
Plant Communities: Disturbed Areas
Elevation: 2000 - 7500 feet

Flower Characteristics

Color: White Shape: Irregular in round clusters Tubular: Y Flowering Period: Apr - Sep
Description: Tiny white flowers are up 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: Round or oval 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 wrinkly surface above, white woolly beneath. Leaves 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.
Seed Notes: One seed per nutlet, less than 1/16 inch long.


	Arizona Cooperative Extension Yavapai County 840 Rodeo Dr #C Prescott, AZ 86305 (928) 445-6590	Version 8.0 http://cales.arizona.edu/yavapaiplants/SpeciesDetailForb.php Last Updated: Dec 13, 2022 Content Questions/Comments: Email Matt Halldorson Legal Disclaimer