| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Carex seorsa Howe | E. C. Howe s.n. May 1886 | United States of America. New York. Rensselaer Co. Lansingburg. [=Lansingburgh] Lansing's Grove. | isotype | 11325 | |
| Carex seorsa Howe | R. F. C. Naczi 14907 with J. Jiang, C. Carollo, F. B. Matos, 20 Jun 2013 | United States of America. New York. Westchester Co. Zofnass Family Preserve. Eastern Loop. Swamp near the entrance. | 01096824 |  | |
| Carex seorsa Howe | W. D. Longbottom 17223 07 May 2012 | United States of America. Delaware. Sussex Co. Town of Laurel, Records Pond, east of US Rt. 12, Sussex Highway (Road 2), swampy woods aroung the pind. | 02147452 |  | |
| Carex seorsa Howe | H. K. D. Eggert s.n. 23 May 95 | United States of America. Georgia. DeKalb Co. Stone Mountain. | 2303175 |  | |
| Carex seorsa Howe | W. H. Witte s.n. 27 May 1933 | United States of America. New Jersey. Cape May Co. Bog at Cold Spring. | 2303176 |  | |
| Carex seorsa Howe | A. C. Ferguson 26 11 May 1921 | United States of America. New York. Millers Pond, Smithtown; Long Island. | 2303177 |  | |
| Carex seorsa Howe | R. M. Harper 2111 09 Apr 1904 | United States of America. Georgia. Jefferson Co. Louisville. Swamp of Rocky Comfort Creek. | 2303179 |  | |
| Carex seorsa Howe | C. H. Peck s.n. May | United States of America. New York. Suffolk Co. Islip. Long Isl. | 2303180 |  | |
| Carex seorsa Howe | W. C. Ferguson s.n. 5-10-21 | United States of America. New York. Nassau Co. Valley Stream. Long Island. | 2303181 |  | |
| Carex seorsa Howe | K. K. Mackenzie 4971 26 May 1912 | United States of America. New Jersey. East of Monmouth Junction. | 2303185 |  | |
| Carex seorsa Howe | E. P. Bicknell s.n. 10 May 1891 | United States of America. New York. Van Cortlandt Park. | 2303186 |  | |
| Carex seorsa Howe | W. C. Ferguson 71 5-18-21 | United States of America. New York. Queens Co. Flushing. Long Island. | 2303188 |  | |
| Carex seorsa Howe | W. C. Ferguson 5523 6-2-27 | United States of America. New York. E. Islip; Long Island. | 2303190 |  | |
| Carex seorsa Howe | W. C. Ferguson 5681 6-20-27 | United States of America. New York. Suffolk Co. Montauk. Long Island. | 2303191 |  | |
| Carex seorsa Howe | H. D. House 5094 21 Apr 1913 - 27 Apr 1913 | United States of America. North Carolina. Onslow Co. Camp Perry. | 2303192 |  | |
| Carex seorsa Howe | B. H. Long 3776 01 Jun 1910 | United States of America. Pennsylvania. Montgomery Co. Willow Grove; above Frazier's Bog about 1 mi. s.e., near Boyer's Corner. | 2303193 |  | |
| Carex seorsa Howe | A. E. Radford 21028 19 Apr 1957 | United States of America. South Carolina. Sumter Co. 4 1/2 miles west fo Pinewood near Millford. | 2303194 |  | |
| Carex seorsa Howe | R. Whitkus 179 30 May 1977 | United States of America. New Jersey. Sussex Co. Stockholm. Swamp behind dam of Summit Lake. | 2303195 |  | |
| Carex seorsa Howe | C. H. Peck s.n. May | United States of America. New York. Suffolk Co. Islip. Long Island. | 2303197 |  | |
| Carex seorsa Howe | W. C. Ferguson s.n. 11 May 1921 | United States of America. New York. Suffolk Co. Smithtown. Miller's Pond. | 2303198 |  |