Cyperus papyrus subsp. madagascariensis (Cyperus papyrus)
Differs from C. papyrus:
Anther connective not or scarcely extending beyond tips of anther locules. Culms triquetrous. Bracts narrow. Bracteoles anthelulas barely exceeding [spikes] usually much shorter. Glumes often intensely brick red. Spikelet wings acute.