1. Species Carex ×aestivaliformis Mack.
2. Species Carex ×knieskernii Dewey
3. Species Carex ×sullivantii Boott
4. Species Carex aestivalis M.A.Curtis ex A.Gray
5. Species Carex angustispica Reznicek & S.González
6. Species Carex anisostachys Liebm.
7. Species Carex arctata Boott
8. Species Carex austromexicana Reznicek
9. Species Carex boliviensis Van Heurck & Müll.Arg.
10. Species Carex brunnipes Reznicek
11. Species Carex bushii Mack.
12. Species Carex caeligena Reznicek
13. Species Carex californica L.H.Bailey
14. Species Carex caroliniana Schwein.
15. Species Carex castanea Wahlenb.
16. Species Carex caxinensis F.J.Herm.
17. Species Carex chiapensis F.J.Herm.
18. Species Carex complanata Torr. & Hook.
19. Species Carex conspecta Mack.
20. Species Carex coulteri Boott ex Hemsl.
21. Species Carex crinalis Boott
22. Species Carex cyrtostachya Janeway & Zika
23. Species Carex dasycarpa Muhl.
24. Species Carex davisii Schwein. & Torr.
25. Species Carex debilis Michx.
26. Species Carex flexirostris Reznicek
27. Species Carex formosa Dewey
28. Species Carex gracillima Schwein.
29. Species Carex guatemalensis F.J.Herm.
30. Species Carex gynodynama Olney
31. Species Carex hebetata Boott
32. Species Carex hirsutella Mack.
33. Species Carex hirtifolia Mack.
34. Species Carex hirtissima W.Boott
35. Species Carex huehueteca Standl. & Steyerm.
36. Species Carex ixtapalucensis Reznicek
37. Species Carex longicaulis Boeckeler
38. Species Carex mackenziana Weath.
39. Species Carex mendocinensis Olney ex Boott
40. Species Carex misera Buckley
41. Species Carex oxylepis Torr. & Hook.
42. Species Carex pallescens L.
43. Species Carex perlonga Fernald
44. Species Carex pertenuis L.H.Bailey
45. Species Carex pinophila Reznicek & S.González
46. Species Carex polymorpha Muhl.
47. Species Carex pubigluma Reznicek
48. Species Carex pygmaea Boeckeler
49. Species Carex queretarensis Reznicek & S.González
50. Species Carex roanensis F.J.Herm.
51. Species Carex steyermarkii Standl.
52. Species Carex swanii (Fernald) Mack.
53. Species Carex tachirensis Steyerm.
54. Species Carex tamana Steyerm.
55. Species Carex tenax Chapm. ex Dewey
56. Species Carex tenejapensis Reznicek & S.González
57. Species Carex torreyi Tuck.
58. Species Carex tovarensis Reznicek & G.A.Wheeler
59. Species Carex venusta Dewey
60. Species Carex virescens Muhl. ex Willd.
61. Species Carex whitneyi Olney
62. Species Carex sullivantii Boott represented as Carex ×sullivantii Boott

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