buffalobur
(Solanum rostratum)
This species is Native to certain parts of the United States but may be invasive to others
Appearance
Solanum rostratum is an annual herbaceous plant that can grow up to 2 ft. (0.6 m) tall.
Foliage
Stems and leaves have extremely sharp spines, so take care when handling them. Leaves are alternate, bright green, petiolate, 4-5 in. (10.2-12.7 cm) long, and pinnately lobed.
Flowers
Flowers have five petals and are yellow, and 1 in. (2.5 cm) across. Calyx tube is 1 in. (2.5 cm) long, and spiny. Flowering occurs from May to October.
Fruit
Fruits are dry berries up to 0.4 in. (1 cm) in diameter covered in sharp spines and contain several wrinkled, flat, black seeds.
Ecological Threat
S. rostratum prefers moist soils and areas like pastures, waste ground, and roadsides. Although it is native to most of North America, it is considered a noxious weed in some states.
Selected Images
Maps
EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
State Lists - This map identifies those states that have this species on their invasive species list or law.
Invasive Listing Sources
Taxonomic Rank
| Domain: Eukarya |
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Superorder: Asteranae |
| Order: Solanales |
| Family: Solanaceae |
| Genus: Solanum |
| Solanum rostratum |
Other System Links
Plants: SORO
Bayer: SOLCU
GRIN: 101426
ITIS: 30454
NPDN Pest: PEWAIBF
NPDN Host: 36476
References
Common Name Reference: Weed Science Society of America Common Names List
Scientific Name Reference: USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.