Galium tinctorium

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Gentianales

Familia: Rubiaceae
Subfamilia: Rubioideae
Tribus: Rubieae
Genus: Galium
Species: Galium tinctorium
Name

Galium tinctorium L.
References

Linnaeus, C. 1753. Species Plantarum. Tomus I: 106. Reference page.
USDA, ARS, Germplasm Resources Information Network. Galium tinctorium in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Galium tinctorium, the stiff marsh bedstraw, is a species of plants in the Rubiaceae. It is widespread and common across the eastern part of North America, from Texas to Labrador and from Minnesota to Florida, plus eastern and central Mexico and the Dominican Republic.[1] It is classed as a noxious weed in some parts of the northeastern United States.[2]

Galium tinctorium is a reclining herb with whorls of narrowly lanceolate leaves. Flowers have 3 petals each instead of the usual 4 more common in the genus. Petals are white in color with tips that are pointed or blunt. It grows in woods, wet ditches, and along shores.[3]
References

Kew World Checklist of Selected Plant Families
Biota of North America Program
Minnesota Wildflowers, Galium tinctorium (Stiff Marsh Bedstraw)