Plant Image
Flower heads
Pinyon Oaks Subdivision - SS

Yavapai County Native & Naturalized Plants

Hymenothrix loomisii - Loomis' thimblehead

Plant Form: Forb

Family: Asteraceae

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Flower head
Willow Lake
Basal leaves
Pinyon Oaks Subdivision
Willow Lake
Willow Lake
Forb Plant Description

Origin: Native   Life Cycle: Biennial or annual   Similar Species: Hymenothrix wrightii
General Desc: Bushy erect plant with stems branching out from the base. The white flower heads are in flat-topped clusters at the ends of the stems. Each flower head consists of many tiny, white, 5-petaled flowers.
Identification notes: Stems rather uniformly leafy to the inflorescence, yellow anthers not exerted from the corolla and overall greenish-yellow cast distinguishes this species from H. wrightii.
Height: About 3 feet


Habitat Description: Mostly in scrub oak, pine communities and rocky places, often with pinyons and junipers.
Plant Communities: Interior Chaparral, Pinyon Juniper Woodland, Montane Conifer Forest, Disturbed Areas
Elevation: 4000 - 8000 feet

Flower Characteristics

Color: Greenish-yellow to white     Shape: Daisy or Dandelion-like in clusters     Tubular: N     Flowering Period: Jul - Oct
Description: Branched, flat-topped flower clusters are found at the top of the stems. What looks like the flower is actually a flower head with 10 to 20 5-petaled florets.

Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Pinnatifid     Leaf Margin: Dissected     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves     Spines: N
Leaf Description: The leaves are dissected into narrow lobes. They are found at the base of the stems and along the stems, becoming sparse toward the top of the plant.

Fruit and Seed Characteristics

Fruit Type: Achene
Fruit Notes: Club shaped to 3/16 inch with 10-15 bristle-tipped scales at one end.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 3.1  
Last Updated: June 15, 2013  
Content Questions/Comments: Email Jeff Schalau  
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