PLATE FIVE. 



Fig. 31. Erigeron pinnatiscclus (Gr.) Nels., from James Peak (13,000 feet altitude); natural size. 



32. Chumophila Jmiwsii Gr., from Longs Peak (12,500 feet altitude); natural size. 



33. Same species; a flower; enlarged. 



34. Same species; the calyx laid open; enlarged. 



35. Same species; diagram of the shoot; L 1 = the first pair of leaves, L 2 = the second, and L 3 = the third; in the 



axil of L 1 is the flowering stem (St.), and in the center of it is a biid (B), containing a corresponding foliage 

 with an axillary inflorescence. 



36. Synthyris alpina Gr., from Longs Peak (12,500 feet altitude); natural size. 



37. Same species; the calyx; enlarged. 



38. Same species; the fruit; enlarged. 



39. Mertensia alpina Don., from Pikes Peak (14,000 feet altitude); natural size. 



40. Same species; a flower; enlarged. 



41. Paronychia pulvinala Gr., from Grays Peak (13,000 feet altitude); natural size. 



