Anonymous - s.n. - United States
Bidault - 4593 - French Southern and Antarctic Lands
Cenchrus echinatus
D'Arcy - 13584 - Panama
Eggert - s.n. - United States
GALIANO - 5103 - Peru
Hernández O. - 68 - Honduras
Hinton - 4800 - Mexico
Mackensen - 211 - United States
Mimoro - 1383 - United States
Nealley - 1 - United States
Nealley - 1453 - United States
Pammel - s.n. - United States
Sieber - 17 - Caribbean
Stevens - 39884 - Nicaragua
Taylor - 32498 - United States
Tharp - 43178 - United States
Yatskievych - 18-177 - United States