Plant Image
Flower


Yavapai County Native & Naturalized Plants

Pennellia micrantha - mountain mock thelypody

Synonyms: Streptanthus micranthus, Thelypodium longifolium var. catalinense, Thelypodium micranthum
Other Common Names: mountain cross
Plant Form: Forb or Subshrub

Family: Brassicaceae


   
 
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Flower stalk
Sue Carnahan @http://swbiodiversity.org, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Leaves
Stephen Hale @http://swbiodiversity.org, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Plant
University of Texas at Austin Herbarium, Usage Rights: CC0 1.0 (Public-domain)
Forb Plant Description

Origin: Native   Life Cycle: Biennial or perennial
General Desc: Small biennial or perennial; erect branches can be simple or many, arising from basal rosette; often leafless; stems hairy near the base, becoming less hairy further from base; sepals purple or green enclose much of the petals; white or purplish petals.
Identification notes: Basal leaves absent at flowering, stem leaves lance-like, narrowest at stem, margin usually toothed; flowers on multiple sides of elongated stems, white or purplish, oblong; fruits slender, to 2-1/2 inches, stalks somewhat erect; seeds not winged.
Height: 1 to 2-1/2 feet


Habitat

Habitat Description: Found on loamy (rich), volcanic, and igneous soils, in pine-oak forests, grasslands, and along cliffs.
Plant Communities: Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest
Elevation: 3000 - 7000 feet


Flower Characteristics

Color: White or purplish     Shape: Regular in elongated clusters     Tubular: N     Flowering Period: Jun - Sep
Description: Flowers white or purplish, small and occasionally bunching in leaf axils; purple or green sepals enclose much of the petals; petals spatula-like to narrow, on slender stalks 1/8 to 1/2 inch long.


Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Toothed     Leaf Attachment: Basal and alternate     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves sparse (are early deciduous and easily separated from plant), with variable margins (can be strongly wavy, lobed, toothed, or smooth), hairs with tree-like branching; basal leaves narrow, 3/4 to 2 inches long, stem leaves oblong to narrow.


Fruit and Seed Characteristics

Fruit Type: Pod
Fruit Notes: Fruits erect to ascending, straight, up to 2-1/2 inches long; partitions transparent; ovules 90 to 140 per ovary.
Seed Notes: Seeds biseriate (arranged in 2 rows) or uniseriate (arranged in a single series), plump, not winged, oblong; seed coat slimy when wet.



  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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