Carex inops
From Puget Prairie Plants
Seed
Abbraviation: CAIN
Seed sample from: 2010
Average measurement: 3.6 x1.6 x 1.3
Measurement Range: L: 2.5 – 4.5, W: 1.2 – 2, D: 1 – 1.9
Features
Shape: Seeds narrow at hilum and opposite apex, rounded in middle. Opposite apex usually sharply pointed. Seed sometimes has bits of husk still attached. Hilum circular.
Color: Tan with some darker brown or black spotting. Hilum usually brown.
Surface: Some concave patches, entire seed covered in fine hair, and matte.
Latitudinal Cross Section: elliptical 
Longitudinal Cross Section: elliptical 
