Comments
provided by eFloras
Recognition of a dozen or more taxa (treated as species, subspecies, varieties, and/or forms) has been proposed for plants treated together here as Xanthium strumarium. Bases for the various taxa mostly involved subtle differences in the burs.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
provided by eFloras
Plants 10–80(–200) cm; nodal spines 0. Leaves: petioles 20–100(–140+) mm; blades suborbiculate to ± pentagonal or deltate, 4–12(–18+) × 3–10(–18+) cm, sometimes palmately 3–5-lobed, abaxial faces green, hirtellous. Burs 10–30+ mm. 2n = 36.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
provided by eFloras
Eurasia.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Elevation Range
provided by eFloras
100-2500 m
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
provided by eFloras
Xanthium americanum Walter; X. chasei Fernald; X. chinense Miller; X. curvescens Millspaugh & Sherff; X. cylindricum Millspaugh & Fernald; X. echinatum Murray; X. echinellum Greene ex Rydberg; X. globosum C. Schull; X. inflexum Mackenzie & Bush; X. italicum Moretti; X. orientale Linnaeus; X. oviforme Wallroth; X. pensylvanicum Wallroth; X. speciosum Kearney, X. strumarium var. canadense (Miller) Torrey & A. Gray, X. strumarium var. glabratum (de Candolle) Cronquist; X. varians Greene; X. wootonii Cockerell
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
