Cyperus retroflexus Buckley var. pumilus (Britton) R. Carter & S.D. Jones. Phen: Jul-Sep. Hab: Cropped fields, seasonally damp, disturbed areas. Dist: AL west to NM, south to Mexico.
ID notes: Spikes are quite similar to C. retrorsus at a glance. The sterile, reduced terminal scales, usually with a minute, uncinate mucro are diagnostic. C. retrorsus is a more robust plant with erect or strongly ascending bracts, and broader leaves and bracts.
Syn: = Carter & Jones (1997); < Cyperus retroflexus – Ar, ETx1, FNA23, GrPl, K1, K3, K4, Mo1, NcTx
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© Aidan Campos source
© Aidan Campos source