Species Detail Forb

Flower Pioneer Park - Sue Smith		Yavapai County Native & Naturalized Plants Solanum rostratum - buffalobur nightshade Synonyms: Androcera rostrata, Solanum cornutum, Solanum propinquum Other Common Names: buffalo-bur, Texas thistle, Colorado bur, Mexican thistle Plant Form: Forb or Subshrub Family: Solanaceae
Flower Pioneer Park - Sue Smith


Home	Plant Communities	Plant List	Search Forbs and Subshrubs	Search Grasses	Search Woody Plants	Additional Resources	About this Website

Click on Any Image for a Larger View
Flower Willow Dells Tr Sue Smith	Leaves Pioneer Park Sue Smith	Plant - summer Pioneer Park Sue Smith	Burs Pioneer Park Sue Smith	Spiny stem Willow Dells Tr Sue Smith

Forb Plant Description

Origin: Native Life Cycle: Annual
General Desc: Stout annuals, stems branching, herbage and sepals are heavily armed with yellow spines, herbage is not glandular but densely hairy with stellate (star-like) hairs.
Identification notes: Very spiny plants with pinnately lobed leaves. Sepals grow larger after flowering and enclose the fruit. Herbage and flowers are not glandular; flowers and anthers are yellow.
Height: To 2-1/2 feet

Habitat

Habitat Description: Roadsides, fields, overgrazed pastures and disturbed areas.
Plant Communities: Disturbed Areas
Elevation: 1000 - 7500 feet

Flower Characteristics

Color: Bright yellow Shape: Regular in elongated clusters Tubular: N Flowering Period: Jun - Sep
Description: To 1 inch wide. Shaped like a star with 5 crinkly lobes and 5 yellow anthers in the center. Few flowers clustered along the end of spiny flower stalks.

Leaf and Stem Characteristics

Leaf Color: Dark green Leaf Type: Simple Leaf Shape: Pinnatifid Leaf Margin: Lobed Leaf Attachment: Alternate Leaves Clasp: N
Hairs: Leaves and stems Spines: Y
Leaf Description: Leaves to 6 inches long and 2 inches wide, 5 to 7 pinnate lobes, borne on stout petioles to 2 inches long. Spines on stalks and vein backs.

Fruit and Seed Characteristics

Fruit Color: Brown to reddish-brown
Fruit Type: Berry-like
Fruit Notes: Spiny sepals grow to enclose the fruit.
Seed Notes: Seeds flattened, ovoid, dark brown and deeply pitted.


	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