Cocklebur (Note: The provided image actually shows a broadleaf weed, Xanthium strumarium, rather than a true grass. The following assessment describes it based on its botanical profile as a weed/herbaceous plant within the requested structure)
Xanthium strumarium · Warm-season, annual broadleaf weed, C3 photosynthetic pathway
AI-generated identification · may be incorrect
Grass Category
Invasive/Weed Plant
Hardiness Zones
USDA Hardiness Zones 3 through 10, adaptable to a wide range of temperate climates worldwide
Grass Family
Asteraceae (Compositae), subfamily Asteroideae
Variety / Cultivar
Wild type (No specific cultivated varieties)
About This Grass
An upright, coarse, branching annual plant reaching 2 to 4 feet in height. Features large, alternate, triangular to heart-shaped leaves with lobed and coarsely toothed margins. Produces distinctive spiny, bur-like seed capsules that hook onto clothing and animal fur.
Blade Characteristics
Broadleaf plant rather than grass blades. Leaves are petiolate, rough-textured with prominent veins, triangular to ovate-cordate, measuring 2 to 6 inches long, with rough hairs on both surfaces. No grass-like ligules, auricles, or vernation.
Root System
Deep, robust taproot system that allows it to access deep soil moisture, making established plants difficult to pull manually. Moderate to fast establishment from seed in disturbed soils.
Growing Information
Origin Region
North America and Central America, now widely distributed globally in temperate and subtropical regions
Growth Habit
Upright, coarse, branching annual herb with a taproot system
Sunlight & Water Needs
Requires full sun for optimal growth. Thrives in moist soils, commonly found in agricultural fields, along riverbanks, and disturbed waste areas. Moderate to high drought tolerance once established due to taproot.
Mowing & Maintenance
Not a turfgrass. Controlled through mechanical pulling, cultivation, or broadleaf herbicides. High maintenance as a weed in agricultural and landscape settings.
Special Characteristics
Produces spiny burs that are a nuisance to livestock and pets. The seeds and seedlings contain toxic glycosides (carboxyatractyloside) which can be poisonous to livestock if ingested in large quantities. Highly competitive in disturbed soils.
Ecological Information
Introduced or native pioneer species in disturbed habitats. Provides minimal wildlife value other than seed consumption by certain birds, but generally considered an agricultural weed. Can form dense stands in floodplains and crop fields, outcompeting native vegetation.