Plant Image
Flowers


Yavapai County Native & Naturalized Plants

Amsonia tomentosa - wooley bluestar

Other Common Names: bluestar, wooly amosonia
Plant Form: Forb or Subshrub

Family: Apocynaceae


   
 
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Leaves and flowers
Gregory Gust @http://swbiodiversity.org, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Plant
Gregory Gust @http://swbiodiversity.org, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Forb Plant Description

Origin: Native   Life Cycle: Perennial
General Desc: Round clusters of about a dozen flowers, borne on short, thick stems. Leaves green, either bright green and hairless or gray-green with a dense covering of fine hairs.
Identification notes: Short, woody plant, many erect stems; 2 forms, green, hairless or gray and woolly. Leaves lance-like to oval, up to 3/4 inch wide. Cylindrical (torulose) follicles (dry, many-seeded fruits opening along one side), distinctly constricted between seeds.
Height: 8 to 16 inches


Habitat

Habitat Description: Sandy deserts.
Plant Communities: Desert Scrub, Interior Chaparral, Semidesert Grasslands
Elevation: 1000 - 5000 feet


Flower Characteristics

Color: Pale grayish-blue     Shape: Regular in round clusters     Tubular: Y     Flowering Period: Apr - Jun
Description: Green flower tube to 1/2 inch long, ringed by narrow, purplish bracts, opening out into 5 pointed grayish-blue (lead-blue) petal lobes; yellowish-green at the base.


Leaf and Stem Characteristics

Leaf Color: Green, grayish-green     Leaf Type: Simple     Leaf Shape: Triangular     Leaf Margin: Smooth     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Stems 8 to 16 inches tall; leaves alternate, oval to lance-like, green and hairless or gray-green with a dense covering of fine hairs, 3/4 to 2 inches long and to 3/4 inch wide.


Fruit and Seed Characteristics

Fruit Type: Pod
Fruit Notes: Follicles (dry, many-seeded fruits opening along one side) 1-1/2 to 3 inches long, without hairs to woolly matted hairs, distinctly constricted between the seeds.
Seed Notes: Oval, corky, 1/2 to 3/4 inch long, 1/8 to 1/4 inch wide.



  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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