Table 1.
Overview of the classification and distribution of Equisetum including information on the samples used in this study
| Classification (Christenhusz et al., 2019) | Distribution | Collection (herbarium) [GenBank numbers rbcL, trnL-F, rps4] |
|---|---|---|
| Subgenus Paramochaete Christenh. & Husby | ||
| Equisetum bogotense Kunth | Andes, Galapagos, Costa Rica | Husby 19 (FTG) [MH750045, MH750162, MH750115] |
| Subgenus Equisetum | ||
| E. arvense L. | Panboreal | McBeath 1622 (E) [MH750038, MH750155, MH750108] |
| E. braunii J.Milde | Western North America | Christenhusz 6233 (H) [MH750087, MH750208, MH750138] |
| E. diffusum D.Don | East Asia | Husby 26 (FTG) [MH750050, MH750167, MH750118] |
| E. fluviatile L. | Panboreal | Christenhusz 6025 (H) [MH750051, MH750168, MH750119] |
| E. palustre L. | Panboreal | Christenhusz 6736 (K) [MH750072, MH750192, MH750129] |
| E. pratense Ehrh. | Panboreal | Väre 19931 (H) [MH750073, MH750193, MH750130] |
| E. sylvaticum L. | Panboreal | Fay 427 (K) [MH750083, MH750204, –] |
| E. telmateia Ehrh. | Western and southern Europe, West Asia | Christenhusz 6009 (H) [MH750090, MH750211, MH750140] |
| Subgenus Hippochaete (J.Milde) Baker | ||
| E. giganteum L. | South America, Central America, Caribbean | Husby 8 (FTG) [MH750054, MH750172, MH750121] |
| E. hyemale L. | Eurasia | McAllister s.n. (E) [MH750062, MH750180, MH750123] |
| E. laevigatum A.Br. | North America | Husby 15 (FTG) [MH750065, MH750183, MH750125] |
| E. myriochaetum Schltdl. & Cham. | Central America and Mexico | Husby 30 (FTG) [MH750070, MH750189, MH750127] |
| E. praealtum Raf. | North America, northeast Asia | Hauk 2011-001 (DEN) [MH750060, MH750178, MH750122] |
| E. ramosissimum var. huegelii (J.Milde) Christenh. & Husby | Tropical Asia, Pacific | Chase 24579 (K) [MH750077, MH750197, MH750131] |
| E. ramosissimum Desf. var. ramosissimum | Warm-temperate Europe, West Asia, East Africa | Christenhusz 5838 (H) [MH750079, MH750199, MH750133] |
| E. scirpoides Michx. | Panboreal | Long 13004 (H) [MH750082, MH750202, MH750134] |
| E. variegatum Schleich. | Panboreal | Husby 10 (FTG) [MH750092, MH750213, MH750142] |
| E. xylochaetum Mett. | Atacama (Chile) | Husby 1 (FTG) [MH750107, MH750228, –] |
| Outgroup (Marattiaceae) | ||
| Marattia alata Sw. | Jamaica, Cuba | Christenhusz 3266 (TUR) [–, EF463240, –] |