Eleocharis engelmannii var. detonsa A.Gray  
Family: Cyperaceae
Engelmann's spike-rush
[Eleocharis engelmannii f. detonsa Steud., Eleocharis obtusa var. detonsa (Willd.) Schult.]
Eleocharis engelmannii var. detonsa image
from USDA Plants website  
Etymology: Eleocharis: Greek elos for "marsh" and charis for grace, referring to marsh plant
Plants: annual sedge
Conservation Status: Special Concern
Eleocharis engelmannii var. detonsa image
Eleocharis engelmannii var. detonsa image
Eleocharis engelmannii var. detonsa image
Eleocharis engelmannii var. detonsa image