Glyceria arkansana Fernald. Arkansas Mannagrass. Phen: May-Jun. Hab: Swamps. Dist: IL south to LA, AR, and e. TX.

Origin/Endemic status: Endemic

Taxonomy Comments: Mohlenbrock (2014) gives additional characters (of unknown utility) for separating G. arkansana from G. septentrionalis: anthers < 1 mm long in G. arkansana (vs. 1-2 mm long in G. septentrionalis), and lemmas 2.5-3.0 mm long and sharply nerved (vs. 3.5-5.5 mm long and obscurely nerved).

Other Comments: The VA report is in error.

Synonymy: = ETx1, F, HC, Il, K1, K3, K4, NcTx, Tx, Tucker (1996); = Glyceria septentrionalis Hitchc. var. arkansana (Fernald) Steyerm. & C.L.Kučera – Ar, FNA24, Mo1, Tn; < Glyceria septentrionalis Hitchc. – C, G

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