Species Detail Forb

Flower stalk		Yavapai County Native & Naturalized Plants Ambrosia confertiflora - weakleaf bur ragweed Synonyms: Frenseria confertiflora Other Common Names: slimleaf bursage Plant Form: Forb or Subshrub Family: Asteraceae
Flower stalk


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Flower stalk Max Licher @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)	Plant Max Licher @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)

Forb Plant Description

Origin: Native Life Cycle: Perennial
General Desc: An erect, leafy somewhat bushy herb which can form large colonies.
Identification notes: Leaf blades are lanceolate to ovate and irregularly 2 to 4 pinnately lobed. Involucres (whorled bracts) of staminate (stamens without pistels) heads are 1/16 to 1/8 + inches in diameter. Spines of burs are awl shaped with hooked tips.
Height: 1 to 3 feet

Habitat

Habitat Description: Grows in a variety of moisture and soil conditions. Usually found in open scrub and waste areas.
Plant Communities: Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest, Riparian, Disturbed Areas
Elevation: 1000 - 7000 feet

Flower Characteristics

Color: Dull yellow to greenish Shape: Daisy or dandelion-like in round clusters Tubular: N Flowering Period: Apr - Nov
Description: Small heads of tiny male flowers, each head enclosed in a drooping green cup. Female heads are clustered in the leaf axil below the male head. Flowers are wind pollinated.

Leaf and Stem Characteristics

Leaf Color: Light green Leaf Type: Simple Leaf Shape: Pinnatifid Leaf Margin: Lobed Leaf Attachment: Alternate Leaves Clasp: N
Hairs: Leaves and stems Spines: N
Leaf Description: Leaves can appear gray because of the many hairs and are 2 to 5 inches long. Narrow stems at ends of fuzzy, green and erect branches.

Fruit and Seed Characteristics

Fruit Color: Light brown (tan)
Fruit Type: Achene
Fruit Notes: Fruits are beak-tipped and armed with 5 to 12 curved spines.
Seed Notes: The plant reproduces from both seeds and rootstock. Each bur contains 1 to 2 seeds.


	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 Legal Disclaimer