Plant Image
Flowers


Yavapai County Native & Naturalized Plants

Plagiobothrys collinus - Cooper's popcornflower

Synonyms: Allocaryastrum collinum, Cryptantha collina, C. inconspicua, Eritrichium collinum, E. inconspicuum
Other Common Names: hill popcornflower
Plant Form: Forb or Subshrub

Family: Boraginaceae


   
 
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Leaves
Arizona State University Vascular Plant Herbarium, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Plant
Max Licher @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Forb Plant Description

Origin: Native   Life Cycle: Annual   Similar Species: Plagiobothrys californicus var. ursinus, P. collinus var. fulvescens
General Desc: Leafy, hairy annual with slender stems that spread on the ground or curve upward. Green leaves have a narrow spoon-like shape. Tiny 5-petaled white flowers resembling popped popcorn grow in elongated clusters that are widely spaced on the flower stalk.
Identification notes: Slender stemmed, stems often trailing, often very leafy; spreading hairs; lower stem leaves opposite, upper alternate, narrow; flowers in elongated clusters, petals white, less than 1/2 inch; nutlet scar left on top of very short angled narrow stalk.
Height: 4 to 16 inches long


Habitat

Habitat Description: Grows in dry, sandy or gravelly soils in a variety of habitats such as chaparral and scrub. Also found in open conifer and oak forests. Reported to grow in various habitats after fires.
Plant Communities: Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest
Elevation: 2000 - 6500 feet


Flower Characteristics

Color: White     Shape: Regular in elongated clusters     Tubular: Y     Flowering Period: Mar - May
Description: Flowers grow on a spike-like stalk from the leaf axils (between the leaf and stem) almost to the base. Each tiny flower is bell-like, has 5 petals and is about 1/16 to 1/4 inch wide. Below each flower are narrow leaf-like sepals about 1/8 inch long.


Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Alternate and opposite     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves and stems are coated in fine and rough hairs. The leaves along the stem are about 1/2 to 1-1/2 inches long. The lower leaves are oppositely arranged on the stem and the upper leaves are alternately arranged.


Fruit and Seed Characteristics

Fruit Color: Light green   
Fruit Type: Nutlet
Fruit Notes: Fruit is an egg-shaped, tiny (1/16 inch) nut with a hard outer layer. Angular intersecting veins can be seen on the nutlet surface with magnification. 4 nutlets are often produced which leave a scar at the tip of the stalk when detaching at maturity.
Seed Notes: Each nutlet contains 1 seed and does not split open to release the seed when ripe.



  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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