Galium obtusum.Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database.USDA SCS. 1989. Midwest wetland flora.Field office illustrated guide to plant species. Midwest National Technical Center.Lincoln. (Accessed 4/2014).

Galium obtusum is a perennial herb, stems matted, branched, 20-80 cm long, 4-sided, angles smooth, nodes densely bearded. 

Leaves in whorls of 4, 1-3 cm long, 0.1-0.6 cm wide, linear to lance-shaped, tips blunt, margins rough. 

Flowers white, 4-parted, 0.2-0.3 cm wide, in clusters of 3-5 at ends of stems; blooms May-July. 

Fruit dry, 2-parted capsule, 0.4-0.5 cm wide, slightly warty, only one side developed. 

Wetland status: FACW+. 

Frequency in NYC: Very infrequent.

 Origin: Native. 

Habitat: Wet meadows and thickets.