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1. Varilla texana A. Gray, Smithsonian Contr. Knowl. 3(5): 123. 1852.
Leaf blades 10–30 × 1–2 mm. Disc corollas ca. 3 mm. Cypselae ca. 2 mm. 2n = 36.
Flowering spring-early summer, fall. Usually on saline, clay or gypseous soils; 50–200 m; Tex.; Mexico (Coahuila, Nuevo Léon, Tamaulipas).
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