| Arisaema stewardsonii Britton | W. L. Stern 115 with G. K. Brizicky,
18 May 1956 | United States of America. Mianus River Gorge, Westchester County, New York and Fairfield County, Connecticut. | | 72260 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 03699006 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699007 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | J. M. Fogg Jr. 16985 | United States of America. Virginia. Giles Co. Kelly Flats, 1 mi. s.w. of Kire. | | 3699008 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699012 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699013 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699014 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699015 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699016 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699018 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699019 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699020 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699022 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699023 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699024 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699025 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699028 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | H. J. Banker 2917 | United States of America. New York. Schaghticoke. On shady bottom of Tomhannock Creek. At foot of bluff near Stover's line on Banker farm. | | 3699030 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699031 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699032 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699033 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699034 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699035 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699036 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699037 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699038 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699039 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699040 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699041 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699042 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699043 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699044 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699045 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699046 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699047 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699048 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699050 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699051 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699052 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699053 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699054 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699055 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | H. N. Moldenke 9522 | United States of America. Vermont. Windham Co. Jamaica. on mountain side. | | 3699011 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | C. A. Weatherby 1120 | United States of America. Connecticut. Tolland Co. Union. | | 3699049 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | N. Taylor 2071 | United States of America. Pennsylvania. Luzerne Co. Bear Run. | | 3699026 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699009 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699010 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699017 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699027 |  |
| Arisaema triphyllum subsp. stewardsonii (Britton) Huttl. | | | | 3699029 |  |
| Arisaema stewardsonii Britton | N. L. Britton s.n.
04 Jul 1901-05 Jul 1901 | United States of America. Pennsylvania. Tannersville. | syntype | 133835 |  |
| Arisaema stewardsonii Britton | N. L. Britton s.n.
04 Jul 1901-05 Jul 1901 | United States of America. Pennsylvania. Tannersville. | syntype | 133836 |  |
| Arisaema stewardsonii Britton | N. L. Britton s.n.
04 Jul 1901-05 Jul 1901 | United States of America. Pennsylvania. Tannersville. | syntype | 133837 |  |