Anthony - 141 - Mexico
Asclepias subulata
Bell - 17525 - Mexico
Breedlove - 43100 - Mexico
Breedlove - 62597 - Mexico
Carter - 4579 - Mexico
Clary - 177 - United States
Constance - 3137 - Mexico
Cox - 4213 - United States
Davidson - 7768 - United States
Davis - s.n. 1880 - United States
Deaver - 5682 - United States
Detling - 7592 - Mexico
Díaz Luna - 7830 - Mexico
Dillon - 1029 - Mexico
Drouet - 3376 - Mexico
Drouet - 3522 - Mexico
Eby - s.n. 1901 - United States
Engelmann - s.n. 1880 - United States
Ferris - 8247 - United States
Fishbein - 1687 - Mexico
Fishbein - 6446 - Mexico
Fosberg - 8419a - United States
Frye - 2280 - Mexico
Gentry - 2984 - Mexico
Gereau - 794 - Mexico
Harder - 1086 - Mexico
Higgins - 18080 - United States
James - 1345 - United States
Jones - 22547 - Mexico
Jones - 22548 - Mexico
Jones - 24191 - Mexico
Jones - 24388 - Mexico
Jones - s.n. 1906 - United States
Martin - s.n. - Mexico
Matuda - 37338 - Mexico
MCKELVEY - 5045 - United States
Miller - 7294 - Mexico
Nye - 73 - United States
O'Kane - 3558 - Mexico
O'Kane - 3588 - Mexico
Palmer - 1216 - Mexico
Palmer - 224 - United States
Parker - 8214 - Mexico
Parry - s.n. 1868 - United States
Peebles - 14569 - United States
Peebles - 14782 - United States
Pinzl - 4767 - United States
Ricketson - 4936 - United States
Rodríguez-Jiménez - 1729 - Mexico
Rose - 1231 - Mexico
Rose - 1307 - Mexico
Saunders - 2028 - Mexico
Shultz - 2333 - United States
Snow - 6462 - Mexico
Snow - 6516 - Mexico
Stevens - 1100 - Mexico
Stevens - 2090 - Mexico
Thackery - 134 - United States
Veatch - s.n. - Mexico
Waterfall - 12822 - Mexico
Wiggins - 172 - Mexico
Wiggins - 4025 - Mexico