Question: Good Afternoon I have several species of sedge growing around my house. I was hoping that you could confirm the …
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Question
Good Afternoon I have several species of sedge growing around my house. I was hoping that you could confirm the identity from the images posted. I believe that the sedge is Cyperus lupulinus. It was found growing in a sunny location in my garden. C. grayi seems to be similar. The achenes are triangular in cross section and measure about 2.0 mm in length. thank you in advance!
Answer
Dear califyank, good afternoon. Great images. I can't tell you for certain which species you have. The ascending involucral bracts suggests Carex grayi, but that species usually has several branches in the inflorescence (unless it is a depauperate specimen). If you check the margins of the bracts just beneath the spikelets, you can determine who this is (prominently scabrous on the margin is Cyperus lupulinus, smooth or nearly so is C. grayi). Hopefully this helps.
