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CCDB → Pteridophytes → Isoëtaceae → Isoetes → Isoetes butleri Engelm.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Isoetes butleri Engelm. | Isoetes butleri Engelm. | 22 | IPCN online | Freeman, C. C. & R. E. Brooks. 1988. Documented plant chromosome numbers 1988: 1. Chromosome counts for North American plants -- I. Sida 13: 241–250. | |||
| Isoetes butleri Engelm. | Isoetes butleri Engelm. | 22 | IPCN online | Musselman, L. J. & K. D. Heafner. 1997. Monograph of southeastern Isoetes. (Abstract). ASB Bull. 44(2): 119. |