Bolboschoenus robustus (Pursh) Soják
Cyperaceae (Sedge Family)
Synonym(s): Schoenoplectus robustus, Scirpus maritimus var. agonus, Scirpus maritimus var. macrostachyus, Scirpus robustus
USDA Symbol: BORO5
Reddish-tan, ovoid to cylindrical spikelets clustered closely against a sharply triangular stem.
Three-squares are an important group of sedges for wildlife. Their seeds are among the most common foods of ducks and marsh birds. Their stems and roots are eaten by muskrats and geese, and they provide cover for many birds and animals. The larger marsh species Olney Three-square (S. americanus) reaches a height of 10' (3 m); its small spikelets are all gathered along one side of the stalk near the top.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Root Type: Fibrous
Leaf Arrangement: Alternate
Leaf Venation: Parallel
Bloom InformationBloom Color: Red
Bloom Time: Jul , Aug , Sep , Oct
DistributionUSA: AL , AR , CA , CT , DC , DE , FL , GA , LA , MA , MD , ME , MS , NC , NH , NJ , NY , RI , SC , TX , VA , VT
Native Distribution: Maine, south to Florida and west to Texas and also in California.
Native Habitat: Brackish, coastal marshes.
Growing ConditionsWater Use: High
Light Requirement: Sun
Soil Moisture: Wet
CaCO3 Tolerance: Medium
Additional resourcesUSDA: Find Bolboschoenus robustus in USDA Plants
FNA: Find Bolboschoenus robustus in the Flora of North America (if available)
Google: Search Google for Bolboschoenus robustus
MetadataRecord Modified: 2017-07-20
Research By: JAM