22. Saxifraga _oppositifolia_, L.--Hook. Fl. Bor. Am. i. p. 242. 23. Saxifraga _cæspitosa_, L.--Hook. Fl. Bor. Am. i. p. 244. 24. Saxifraga _Hirculus_, L.--Hook. Fl. Bor. Am. i. p. 252. 25. Saxifraga _tricuspidata_, L.--Hook. Fl. Bor. Am. i. p. 254. COMPOSITÆ, _Juss._ 26. Nardosmia _corymbosa_, Hook. Fl. Bor. Am. i. p. 307 (Tussilago corymbosa, Br.) 27. Achillæa _millefolium_, L.--Hook. Fl. Bor. Am. i. p. 318. 28. Chrysanthemum _arcticum_, L.--Hook. Fl. Bor. Am. i. p. 319. 29. Pyrethrum _inodorum_, Sm.--Hook. Fl. Bor. Am. i. p. 320. 30. Senecio _aureus_, L.--Hook. Fl. Bor. Am. i. p. 333. var. nanus. 31. Arnica _montana_, L.--[Greek: b]. _angustifolia_, Hook. Fl. Bor. Am. i. p. 330. CAMPANULACEÆ, _Juss._ 32. Campanula _uniflora_, L.--Hook. Fl. Bor. Am. ii. p. 29. ERICEÆ, _L._ 33. Ledum _palustre_, L.--Hook. Fl. Bor. Am. ii. p. 44.--var. [Greek: a]. _angustifolium_; and var. [Greek: b]. _latifolium_. 34. Azalea _procumbens_, L.--Hook. Fl. Bor. Am. ii. p. 44. 35. Rhododendron _Lapponicum_, Wahl.--Hook. Fl. Bor. Am. ii. p. 43. 36. Vaccinium _Vitis Idæa_, L.--Hook. Fl. Bor. Am. ii. p. 34. MONOTROPEÆ, _Nutt._ 37. Pyrola _rotundifolia_, L.--Hook. Fl. Bor. Am. ii. p. 46. BORAGINEÆ, _Juss._ 38. Lithospermum _maritimum_, Lehm.--Hook. Fl. Bor. Am. ii. p. 86. SCHOPHULARINEÆ, _Juss._ 39. Castilleja _pallida_, Benth.--Hook. Fl. Bor. Am. ii. p. 105. 40. Bartsia _alpina_, L.--Hook. Fl. Bor. Am. ii. p. 106. 41. Pedicularis _Wlassoviana_, Stev.--Hook. Fl. Bor. Am. ii. p. 107. 42. Pedicularis _Lapponica_, L.--Hook. Fl. Am. ii. p. 108. 43. Pedicularis _Sudetica_, Willd.--Hook. Fl. Bor. Am. ii. p. 109. 44. Pedicularis _flammea_, L.--Hook. Fl. Bor. Am. ii. p. 110. 45. Pedicularis _euphrasioides_, Stev.--Hook. Fl. Bor. Am. ii. p. 108. PRIMULACEÆ, _Juss._ 46. Androsace _septentrionalis_, L.--Hook. Fl. Bor. Am. ii. p. 119. 47. Primula _Hornemanniana_, Lehm.--Hook. Fl. Bor. Am. ii. p. 120. POLYGONEÆ, _Juss._ 48. Polygonum _viviparum_, L.--Hook. Fl. Bor. Am. ii. p. 130. AMENTACEÆ, _Juss._ 49. Salix _Richardsoni_, Hook. Fl. Bor. Am. ii. p. 147, Tab. 182. 50. Salix _vestita_, Ph.--Hook. Fl. Bor. Am. ii. p. 152. 51. Salix _Arctica_, Br.--Hook. Fl. Bor. Am. ii. p. 152. 52. Betula _glandulosa_, Mx.--Hook. Fl. Bor. Am. ii. p. 156. 53. Betula _nana_, L.--Hook. Fl. Bor. Am. ii. p. 156. MONOCOTYLEDONES. MELANTHACEÆ, _Br._ 54. Tofieldia _palustris_, Huds.--Hook. Fl. Bor. Am. ii. p. 179. ORCHIDEÆ, _Juss._ 55. Platanthera _obtusata_, Lindl.--Hook. Fl. Bor. Am. ii. p. 196, Tab. 199. 56. Platanthera _rotundifolia_, Lindl.--Hook. Fl. Bor. Am. ii. p. 200, Tab. 201. CYPERACEÆ, _Juss._ 57. Carex _dioica_, L.--Hook. Fl. Bor. Am. ii. p. 208. 58. Carex _fuliginosa_, Sternb. and Hoppe.--Hook. Fl. Bor. Am. ii. p. 224.