Plant Image
Flower heads


Yavapai County Native & Naturalized Plants

Lepidium montanum - mountain pepperwort

Synonyms: Lepidium alyssoides, Lepidium albiflorum, Lepidium corymbosum, Lepidium lasiocarpum var. cinereum and more. See SEINET.
Other Common Names: mountain pepperweed, Montana pepperweed (see USDA Plants)
Plant Form: Forb or Subshrub

Family: Brassicaceae


   
 
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Leaves
Tony Frates @http://swbiodiversity.org, Usage Rights Creative Commons Attribution-ShareAlike (CC BY-SA)
Plants
Patrick Alexander @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Fruit
Tony Frates @http://swbiodiversity.org, Usage Rights Creative Commons Attribution-ShareAlike (CC BY-SA)
Forb Plant Description

Origin: Native   Life Cycle: Biennial or perennial
General Desc: Grows from a taproot and sometimes a woody base. Stems usually several, erect to ascending, often branched above the base. Herbage may or may not be hairy; pungent, watery sap.
Identification notes: Short, spreading, rounded form; wider than tall. Leaves near base divided into several toothed lobes, leaves further up on the stem shorter and often undivided. Distinctive small, round, flat seed pods and small white 4-petaled flowers.
Height: 1-1/2 to 27-1/2 inches


Habitat

Habitat Description: Found in pinyon juniper woodlands, sagebrush and other shrub communities, rocky hillsides and crevices, spring seepages, washes, gypseous grounds, sandstone cliffs, limestone gravel, playas, knolls, gumbo hills, sandy areas, alkaline flats.
Plant Communities: Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest, Riparian
Elevation: 3000 - 7500 feet


Flower Characteristics

Color: White     Shape: Regular in round clusters     Tubular: N     Flowering Period: Apr - Sep
Description: Small white flowers in terminal congested flower heads that are much-elongated in fruit; sepals 4, oblong to broadly ovate, <1/16 inch long; petals 4 in a cross formation.


Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Pinnatifid     Leaf Margin: Toothed     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Basal leaves form distinct rosettes on stems to 2-3/4 inches long; leaves alternate, short-stemmed or without a stem; blades 1 to 2-1/2 inches long, rarely undivided; lobe margins entire or toothed with points directed outward. Herbage may be hairy.


Fruit and Seed Characteristics

Fruit Type: Pod
Fruit Notes: Seed pods ovate to nearly round, rarely oblong, 1/16 to 1/4 inch wide, with a small notch at the tip.
Seed Notes: Oblong, 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  
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