• C. Zupan 307, United States of America
• N. H. Holmgren 6087, United States of America
• K. F. Parker 6903, United States of America
• D. D. Keck 647, United States of America
• D. D. Keck 651, United States of America
• D. D. Keck 656, United States of America
• D. D. Keck 673, United States of America
• D. D. Keck 688, United States of America
• D. D. Keck 781, United States of America
• D. D. Keck 782, United States of America
• D. D. Keck 790, United States of America
• L. M. Shultz 2264, United States of America
• S. Goodrich 11725, United States of America
• K. H. Thorne 617, United States of America
• G. T. Austin s.n., United States of America
• G. T. Austin s.n., United States of America
• A. P. Pinzl 3350, United States of America
• A. P. Pinzl 3401, United States of America
• A. P. Pinzl 3601, United States of America
• J. L. Reveal 4689, United States of America
• A. P. Pinzl 11628, United States of America
• J. L. Gentry, Magnoliophyta; North America
• J. L. Gentry, Magnoliophyta; North America
• A. Cronquist 10974, United States of America
• S. Flowers s.n., United States of America
• W. P. Cottam s.n., United States of America
• A. P. Pinzl 1889, United States of America
• A. P. Pinzl 10025, United States of America
• A. P. Pinzl 10083, United States of America
• A. P. Pinzl 10113, United States of America
• A. P. Pinzl 10148, United States of America
• A. P. Pinzl 10673, United States of America
• A. P. Pinzl 10680x, United States of America
• A. P. Pinzl 10701, United States of America
• A. P. Pinzl 11086, United States of America
• A. P. Pinzl 11661, United States of America
• A. P. Pinzl 11676, United States of America
• A. P. Pinzl 13443, United States of America
• C. L. Hitchcock 5652, United States of America
• C. R. Annable 2540, United States of America
• E. B. Payson s.n., United States of America
• Smith s.n., United States of America
• B. F. Harrison 13321, United States of America
• R. R. White 1114, United States of America
• J. H. Christ 7957, United States of America
• B. F. Harrison 7461, United States of America
• L. E. Mills 1497, United States of America
• O. Davis s.n., United States of America
• E. Palmer 377, United States of America
• M. E. Jones 5486s, photo of type; North America
• M. E. Jones 5486S, United States of America
• T. C. Porter s.n., United States of America
• M. E. Jones 5433, United States of America
• M. E. Jones s.n., United States of America
• R. Foster 7008, United States of America
• E. J. Neese 11990, United States of America
• H. D. D. Ripley 9172, United States of America
• H. D. D. Ripley 9197, United States of America
• E. J. Neese 8073, United States of America
• F. W. Pennell 23310, United States of America
• F. Ramaley 3611, United States of America
• B. K. Crane 139BC, United States of America
• A. H. Holmgren 3503, United States of America
• S. Watson 773, isotype; North America
• J. H. Christ 7943, United States of America
• A. Nelson 1796, United States of America
• A. Nelson 1796, United States of America
• F. W. Pennell 6162, United States of America
• F. W. Pennell 6168, United States of America
• F. W. Pennell 22244, United States of America
• D. D. Keck 823, United States of America
• M. M. Douglass 54286, United States of America
• E. Palmer 377, United States of America
• J. S. Tuhy 962, United States of America
• J. S. Tuhy 2314, United States of America
• S. L. Welsh 12355, United States of America
• S. L. Welsh 12355, United States of America
• S. L. Welsh 13845, United States of America
• S. L. Welsh 15092, United States of America
• S. L. Welsh 17085, United States of America
• S. L. Welsh 17789, United States of America
• S. L. Welsh 18775, United States of America
• S. L. Welsh 19717, United States of America
• E. M. Harvey 92, United States of America
• D. D. Keck 688, United States of America
• D. D. Keck 782, United States of America
• M. E. Lewis 4780, United States of America
• D. V. Clark 596, United States of America
• R. Foster 4312, United States of America
• R. Foster 4807, United States of America
• R. Foster 5085, United States of America
• R. Foster 6595, United States of America
• R. Foster 6633, United States of America
• R. Foster 6646, United States of America
• R. Foster 7008, United States of America
• R. Foster 7070, United States of America
• R. Foster 8139, United States of America
• E. J. Neese 3390, United States of America
• E. J. Neese 3634, United States of America
• E. J. Neese 8023, United States of America
• E. J. Neese 9227, United States of America
• E. J. Neese 11990, United States of America
• E. J. Neese 14351, United States of America
• E. J. Neese 14424, United States of America
• E. J. Neese 15799, United States of America
• L. M. Shultz 2032, United States of America
• R. J. Kass 3623, United States of America
• L. Armstrong 116, United States of America
• L. C. Higgins 14519, United States of America
• L. C. Higgins 20527, United States of America
• A. Huber 4068, United States of America
• A. Taye 2318, United States of America
• A. Taye 2329, United States of America
• A. Taye 2503, United States of America
• R. J. Shaw 3870, United States of America
• A. Cronquist 9293, United States of America
• A. Cronquist 9324, United States of America
• A. Cronquist 9440, United States of America
• N. H. Holmgren 2116, United States of America
• N. H. Holmgren 2145, United States of America
• N. H. Holmgren 2152, United States of America
• N. H. Holmgren 2279, United States of America
• N. H. Holmgren 3724, United States of America
• N. H. Holmgren 10552, United States of America
• N. H. Holmgren 11669, United States of America
• N. H. Holmgren 14080, United States of America
• F. W. Pennell 6140, United States of America
• F. W. Pennell 22504, United States of America
• F. W. Pennell 21998, United States of America
• F. W. Pennell 22580, United States of America
• F. W. Pennell 22788, United States of America
• F. W. Pennell 22801, United States of America
• F. W. Pennell 22837, United States of America
• M. E. Jones s.n., United States of America
• N. H. Holmgren 6059, United States of America
• N. H. Holmgren 8239, United States of America
• N. H. Holmgren 8520, United States of America
• N. H. Holmgren 8600, United States of America
• N. H. Holmgren 9316, United States of America
• N. H. Holmgren 9327, United States of America
• W. Hess 7623, United States of America
• N. H. Holmgren 1101, United States of America
• N. H. Holmgren 1418, United States of America
• N. H. Holmgren 1472, United States of America
• N. H. Holmgren 1516, United States of America
• N. H. Holmgren 1564, United States of America
• N. H. Holmgren 2155, United States of America
• N. H. Holmgren 2800, United States of America
• N. H. Holmgren 3522, United States of America
• N. H. Holmgren 3655, United States of America
• N. H. Holmgren 4439, United States of America
• P. Train 681, United States of America
• P. Train 681, United States of America
• P. Train 4546, United States of America
• N. E. Nichols 290, United States of America
• N. E. Nichols 417, United States of America
• S. Goodrich 9819, United States of America
• P. A. Lott 150, United States of America
• K. Kolar 1938, United States of America
• B. F. Harrison 13320, United States of America
• B. F. Harrison 13325, United States of America
• B. F. Harrison 13325, United States of America
• B. F. Harrison 13332, United States of America
• A. H. Holmgren 1296, United States of America
• K. H. Beach 889, United States of America
• B. K. Crane 326BC, United States of America
• M. H. Burke M.B.8, United States of America
• F. W. Pennell 22870, United States of America
• F. W. Pennell 23040, United States of America
• F. W. Pennell 23108, United States of America
• F. W. Pennell 23200, United States of America
• F. W. Pennell 23309, United States of America
• J. S. Tuhy 1906, United States of America
• K. A. Vincent 4383, United States of America
• A. Cronquist 11693, United States of America
• R. Foster 7904, United States of America
• M. J. Williams E1, United States of America
• M. J. Williams E9, United States of America
• M. J. Williams 7816914, United States of America
• M. J. Williams 782784, United States of America
• M. J. Williams 78 280, United States of America
• M. J. Williams 79 108018, United States of America
• M. J. Williams 80 1768, United States of America
• M. J. Williams 80 1785, United States of America
• M. J. Williams 81 1576, United States of America
• M. J. Williams 831036, United States of America
• E. Clements s.n., United States of America
• D. D. Keck 620, United States of America
• E. C. Jaeger s.n., United States of America
• B. O. Moore 709, United States of America
• M. Curto 1578, United States of America
• V. Bostick 1215, United States of America
• A. Tiehm 2740, United States of America
• A. Tiehm 5145, United States of America
• A. Tiehm 5399, United States of America
• A. Tiehm 12679, United States of America
• E. J. Neese 9118, United States of America
• E. J. Neese 9118, United States of America
• S. White 312, United States of America
• S. White 312, United States of America
• S. White 312, United States of America
• K. H. Thorne 1126, United States of America
• R. D. Dorn 9825, United States of America
• E. A. Holt 466, United States of America
• E. Foley 9608, United States of America
• M. Madsen 1867, United States of America
• D. H. Mansfield 04323, United States of America
• D. Russell 44, United States of America
• J. F. Smith 9830, United States of America
• C. A. Morse 17894, United States of America
• C. C. Freeman 24579, United States of America
• C. A. Morse 17667, United States of America
• C. C. Freeman 23604, United States of America
• N. D. Atwood 20075, United States of America
• N. D. Atwood 8018, United States of America
• N. D. Atwood 16216, United States of America
• N. D. Atwood 9120, United States of America
• N. D. Atwood 9120, United States of America
• N. D. Atwood 10248, United States of America
• N. D. Atwood 29438, United States of America
• N. D. Atwood 31395, United States of America
• E. Palmer 330, United States of America
• N. H. Holmgren 6124, United States of America
• G. J. Goodman 3077, United States of America
• B. Maguire 16964, United States of America
• B. Maguire 16966, United States of America
• B. Maguire 21876, United States of America
• B. Maguire 2793, United States of America
• B. Maguire 18404, United States of America
• B. Maguire 19372, United States of America
• B. Maguire 19307, United States of America
• B. Maguire 21137, United States of America
• B. Maguire 18527, United States of America
• B. Maguire 18630, United States of America
• B. Maguire 18397a, United States of America
• B. Maguire 21060, United States of America
• B. Maguire 25858, United States of America
• B. Maguire 21109, United States of America
• B. Maguire 18581, United States of America
• B. Maguire 18559, United States of America
• B. Maguire 20950, United States of America
• B. Maguire 19327, United States of America
• B. Maguire 25701, United States of America
• B. Maguire 25605, United States of America
• B. Maguire 21188, United States of America
• C. T. Rogerson s.n., United States of America
• C. T. Rogerson s.n., United States of America
• S. L. Welsh 15080, United States of America
• Penstemon watsonii A.Gray
• J. E. Fryxell s.n., United States of America
• G. Vasey 385B, United States of America
• A. O. Garrett 7057, United States of America
• M. K. Kirkpatrick 6546, United States of America
• Penstemon watsonii A.Gray
• N. Otting 347, United States of America
• P. A. Lebenbauer s.n., United States of America
• E. Palmer 377, United States of America
• N. D. Atwood 13927, United States of America
• N. H. Holmgren 12032, United States of America
• S. L. O'Kane, Magnoliophyta; North America
• A. Huber 2728, United States of America
• W. Baker 82220, United States of America
• A. Huber 1838, United States of America
• A. A. Heller 9096, United States of America
• A. A. Heller 9115, United States of America
• P. A. Rydberg 7633, United States of America
• B. Franklin 819, United States of America

• Penstemon watsonii A.Gray