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Flowers


Yavapai County Native & Naturalized Plants

Amsonia palmeri - Palmer's bluestar

Synonyms: Amsonia palmerii, Amsonia pogonosepala, Amsonia standleyi, Amsonia biformis
Other Common Names: bluestar, Palmer bluestar
Plant Form: Forb or Subshrub

Family: Apocynaceae


   
 
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Leaves and flowers
Sue Carnahan @http://swbiodiversity.org, 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: Perennial   Similar Species: A. eastwoodiana, A.peeblesii
General Desc: Mounds of willowy leaves and wiry stems topped by star-shaped, bluish-white flowers from a woody root stock. Closely resembles root systems, stems and leaves of A. eastwoodiana (Eastwood's Bluestar) and A. peeblesii (Peebles' bluestar).
Identification notes: Several erect or ascending stems from woody root stock; milky sap; leaves alternate, hairy or hairless, narrow, dark green; flower lobes 1/8 to 1/4 inch long and less than half as long as tube; fruit a pair of elongated, round in cross section capsules.
Height: 1 to 3 feet


Habitat

Habitat Description: Found mostly along watercourses within riparian forests, desert grasslands, mesquite scrublands and pinyon juniper woodlands.
Plant Communities: Riparian
Elevation: 2500 - 4500 feet


Flower Characteristics

Color: Bluish-white     Shape: Regular in round clusters     Tubular: Y     Flowering Period: Mar - Jun
Description: Flower head in clusters at top of plant; flowers tubular with spreading star-like openings; 5 slightly twisted outer lobes, 1/6 to 1/2 inch long; flower tube 1/2 to 3/4 inch long, broadest below the apex; spreading lobes 1/8 to 1/4 inch long.


Leaf and Stem Characteristics

Leaf Color: Dark green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves     Spines: N
Leaf Description: Alternate, growing on stem, lance-like to elongated; lower leaves 1 to 3-1/2 inches long, 1/4 to 3/4 inch wide; upper leaves smaller, 1 to 2-3/4 inches long, 1/16 to 1/2 inch wide; smooth to hairy with prominent mid-vein.


Fruit and Seed Characteristics

Fruit Type: Capsule
Fruit Notes: Pair of elongated, circular in cross section capsules, 3/4 to 5 inches long, dry, many-seeded fruits opening along 1 side.
Seed Notes: Cylindrical, corky, 1/4 to 1/2 inch long, to 1/8 inch broad.



  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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