Solanum rostratum

(Buffalo Bur)

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Solanum rostratum, Overland Trail Recreation Area, Sterling, Logan Co. 7287

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Solanum rostratum, Overland Trail Recreation Area, Sterling, Logan Co. 7278

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Solanum rostratum, Overland Trail Recreation Area, Sterling, Logan Co. 7271

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Solanum rostratum, Overland Trail Recreation Area, Sterling, Logan Co. 7273

Scientific Name Solanum rostratum USDA PLANTS Symbol SORO
Common Name Buffalo Bur ITIS Taxonomic Serial No. 30454
Family Solanaceae (Nightshade) SEINet
Reference
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Description Life zones and habitat: Plains and foothills (3500 to 8500 ft.); various soil types, including dry, rocky soils; waste areas, overgrazed pastures and along roadsides.
Plant: Erect annual up to 28 inches tall, single or a few much-branched hairy stems with long yellow sharp spines.
Leaves: Alternate, blades elliptic to broadly ovate in outline, 1-1/2 to 6 inches long; irregularly pinnately-lobed or twice pinnatifid to pinnatisect near the base; prickly along main veins.
Inflorescence: Terminal, or arising from leaf axils, racemes with a few bright yellow flowers 3/4 to 1-inch across with 5 widely spreading petals or lobes and protruding anthers.
Fruit: Spiny berries (burs).
Bloom Period: April to November.
References: "Flora of Colorado" by Jennifer Ackerfield, "Wildflowers of the Texas Hill Country" by Marshall Enquist and "Wildflowers of Texas" by Geyata Ajilvgsi.
BONAP Distribution Map


Map Color Key
Colorado Status:
Native

© Tom Lebsack 2022

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