Plant Image
Flower head
Highlands Center for Natural History - Sue Smith

Yavapai County Native & Naturalized Plants

Cosmos parviflorus - southwestern cosmos

Synonyms: Coreopsis parviflora
Plant Form: Forb

Family: Asteraceae

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Flower head
Willow Dells
Sue Smith
Willow Dells
Sue Smith
Leaf attachment
Willow Dells
Sue Smith
Plant - summer
Willow Dells
Sue Smith
Forb Plant Description

Origin: Native   Life Cycle: Annual
General Desc: Southwestern cosmos grows 2 to 3 feet tall and is branched several times in the upper half, with a single flower head at the end of each slender, bare stem. The plants have a sparse, airy appearance.
Identification notes: Annual of slender leafy stems and opposite leaves. Leaves are dissected 2 to 3 times into narrow lobes. Flowers have white to pinkish-purple ray flowers and yellow disc flowers. Flowers are solitary, terminal and 1-1/4 inches across.
Height: To 3 feet


Habitat Description: Open or forested slopes and canyons, sometimes in disturbed and cultivated areas.
Plant Communities: Pinyon Juniper Woodland, Montane Conifer Forest, Disturbed Areas
Elevation: 4000 - 9000 feet

Flower Characteristics

Color: White to pinkish-purple     Shape: Daisy or dandelion-like not in clusters     Tubular: N     Flowering Period: Jul - Oct
Description: The flowers have 8 pale pink ray flowers, bright yellow disc flowers and 8 long, narrow sepals. The flower heads are about 1-1/4 inches across.

Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Compound     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Opposite     Leaves Clasp: N
Hairs: No     Spines: N
Leaf Description: The leaves are very finely divided 2 or 3 times into threadlike segments. They are to 3 inches long.

Fruit and Seed Characteristics

Fruit Color: Blackish   
Fruit Type: Achene
Seed Notes: Seeds are slender with 2 barbs at one end which snag onto passing animals or people for dispersal.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 7.0  
Last Updated: May 10, 2017  
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