United States National Museum of Natural History at Beltsville, Maryland, USA.

 

USA — ARIZONA: Baker & Tuttle (1972);

 

POACEAE: Hilaria rigida (Thurber) — Baker & Tuttle (1972); Panicum obtusum H.B. & K. — Baker & Tuttle (1972); Tridens pulchellus (H.B. & K.) Hitchcock — Baker & Tuttle (1972);

 

Catalog: Baker & Suigong (1988); Mesa et al. (2009); Sepasgosarian (1983);

Redescription: Akbar & Chaudhri (1983); Chaudhri & Akbar (1985); Khanjani et al. (2012b); Meyer (1979); Mitrofanov & Strunkova (1979);