Little Thumb Butte
Sue Smith
Yavapai County Native & Naturalized Plants
   
 
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Plant Image
Flowers
Granite Mtn - Tr 308
Sue Smith
Plant Description

Origin: Native
General Description: Evergreen. Stems solitary to few, erect, unarmed, much-branched, spreading or ascending branches and woody base, branches and twigs covered with dense, felt-like hairs interspersed with smooth hairless streaks. A highly drought tolerant plant.
Identification notes: Shrub, forms dense clumps; individual plants produce up to 5 stems; without spines; grayish-green spiny leaves, covered with densely matted woolly hairs; leaves angle upwards; 4 disk flowers; short, stiff, hairy fruit; fine bristles on seed tops.
Height: 2 feet     Width: 5 feet

Habitat

Habitat Description: Found in dry, open rocky places, sometimes in saline soil.
Plant Communities: Pinyon Juniper Woodland, Montane Conifer Forest
Elevation: 6000 - 7400 feet

Flowers

Color: Yellowish-white to bright yellow   Shape: Daisy or dandelion-like in round clusters    Tubular: N   Flowering Period: Jul - Oct
Description: Flowers yellowish-white to bright yellow. Flower heads consist of 4 disc only flowers and 4 to 6 woolly bracts surrounding the head to 5/8 inch long in terminal clusters.

Leaves

Leaf Color: Grayish-green   Type: Simple   Shape: Narrow   Margin: Smooth   Attachment: Alternate   Hairs: Top and bottom of leaves
Description: Woolly and narrow to 1/2 inch long growing along the entire stem. The margins are smooth and the leaf has a prominent midvein. New leaves have a silvery appearance.

Fruit

Color: Brown   Type: Achene   Description: Fruit is a densely silky achene with tan bristles to 3/4 inch long.

Bark/Branches

Bark Color: Gray   Bark Texture (Mature): Rough   Bark and Branch Description: Stems are erect, short and stout. New growth is densely silvery hairy. Older bark is gray and shreddy. Old leaf bud scars appear swollen, giving a knobby appearance.
Spines, thorns or prickles: N
  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
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Last Updated: Dec 13, 2022
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