| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Graffenrieda irwinii Wurdack | B. Maguire 23131 with Fanshawe, D.B., 01 May 1944 | Guyana. British Guiana. | 2464750 |  | |
| Graffenrieda irwinii Wurdack | L. J. Gillespie 913 with H. Persaud, 29 Mar 1989 | Guyana. Potaro-Siparuni. Kaieteur National Park, between airstrip and escarpment. ENE of airstrip. | |||
| Graffenrieda irwinii Wurdack | R. S. Cowan 1835 with T. R. Soderstrom. Smithsonian Botany-Exhibits Exped, 11 Feb 1962 | Guyana. Potaro-Siparuni. Kaieteur Plateau, along trail from plane landing to Kaieteur Falls. | |||
| Graffenrieda irwinii Wurdack | R. S. Cowan 1962 with T. R. Soderstrom. Smithsonian Botany-Exhibits Exped, 25 Feb 1962 | Guyana. Potaro-Siparuni. Kaieteur Savanna. | |||
| Graffenrieda irwinii Wurdack | F. A. Michelangeli 2584 28 Mar 2014 | Guyana. Potaro-Siparuni. Kaieteur National Park; rocks near top of falls. | 02098131 |  | |
| Graffenrieda irwinii Wurdack | L. J. Gillespie 913 29 Mar 1989 | Guyana. Potaro-Siparuni. Kaieteur National Park, between airstrip and escarpment. | 2464749 |  | |
| Graffenrieda irwinii Wurdack | R. S. Cowan 1962 with Soderstorm, T.R., 25 Feb 1962 | Guyana. Savanna and Low savanna forest near Kaietuer Falls. | 2464751 |  | |
| Graffenrieda irwinii Wurdack | H. S. Irwin 117 17 Jan 1954 | Guyana. Potaro-Siparuni. Kaieteur Falls, Potaro R. | |||
| Graffenrieda irwinii Wurdack | J. J. Pipoly 9961 with G. Gharbarran, 25 Jan 1987 | Guyana. Potaro-Siparuni. Kaieteur National Park. | |||
| Graffenrieda irwinii Wurdack | J. J. Pipoly 10137 with G. Gharbarran, 28 Jan 1987 | Guyana. Potaro-Siparuni. Kaieteur Falls National Park, trail to Johnson's view, cliff area proceeding S. | |||
| Graffenrieda irwinii Wurdack | J. J. Pipoly 9961 with G. Gharbarran, 25 Jan 1987 | Guyana. Potaro-Siparuni. Kaieteur National Park. | 2464748 |  | |
| Graffenrieda irwinii Wurdack | J. J. Pipoly 10137 with G. Gharbarran, 28 Jan 1987 | Guyana. Potaro-Siparuni. Kaieteur Falls National Park, trail to Johnson's view, cliff area proceeding S. | 02464747 |  | |
| Graffenrieda irwinii Wurdack | W. J. Hahn 4116 with E. Judziewicz, S. Tiwari, D. Gopaul, 2 Apr 1988 | Guyana. Potaro-Siparuni. Kaieteur Falls National Park. |
