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Yavapai County Native & Naturalized Plants

Symphyotrichum expansum - Southwestern annual saltmarsh

Synonyms: Symphyotrichum subulatum var. parviflorum, Aster inconspicuus, Aster subulatus var. cubensis, Tripolium subulatum
Plant Form: Forb or Subshrub

Family: Asteraceae

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Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Leaves and flowers
Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Forb Plant Description

Origin: Native   Life Cycle: Annual
General Desc: Plant is erect, often with short leafy branches.
Identification notes: Taprooted annual; flower head of 21 to 54 ray flowers longer than wide, rays greater than or equal to 0.2 mm wide, 7 to 23 disc flowers; phyllaries (bracts) taper-pointed; leaves narrow, or somewhat broader and tapering towards the stem.
Height: 1 to 3 feet


Habitat Description: Roadsides, marshy habitats, ditches and ravines.
Plant Communities: Riparian, Disturbed Areas
Elevation: Below 3500 feet

Flower Characteristics

Color: White or purplish     Shape: Daisy or dandelion-like in elongated clusters     Tubular: N     Flowering Period: Jul - Nov
Description: Flower heads on each plant can number 20 to 100 and occur in open, diffuse arrays.

Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: No     Spines: N
Leaf Description: Leaves are thin and green to dark green with smooth margins. Bases of leaves (petioles) have sheaths that wrap around the stems. Stems are smooth and erect, often with purple or purplish brown areas.

Fruit and Seed Characteristics

Fruit Color: Light brown to purple   
Fruit Type: Achene
Fruit Notes: Papery fruit capsule is light brown to purple with white bristles.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
Last Updated: Nov 21, 2021
Content Questions/Comments: Email Mary Barnes  
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