44 VEGETATION IN COLORADO-HOLM. [ME5,0K mf'v^ 



[Vol. XIX. 



EXPLANATION OF PLATES. 



PLATE 1. 



FlG. 1. Viola bellidifolia Greene, from Thompsons Canyon on Longs Peak (10,500 feet altitude); natural size. 



2. Lychnis montana Wats. 



3. Same species, both from Pikes Peak (14,000 feet altitude); natural size. 



4. Same species, from Longs Peak (12,000 feet altitude); natural size. 



5. Stellaria umbellata Turcz., from Pikes Peak (14,000 feet altitude); natural size. 



6. Same species; the inflorescence; enlarged. 



7. Same species; a floral shoot with stolons; enlarged. 



8. Calandrinia pygmaea Gr.; a seedling, showing the swollen primary root and the cotyledons from James Peak 



(13,000 feet altitude) ; enlarged. 



9. Same species from the same locality; natural size. 



PLATE 2. 



Fig. 10. Sieversia Rossii R. Br., from Longs Peak (12,500 feet altitude); natural size. 



11. Saxifraga bronchialis L., from Grays Peak (12,500 feet altitude); natural size. 



12. Same species; a leaf ; enlarged. 



13. Saxifraga cernua L., from Pikes Peak (14,000 feet altitude); natural size. 



14. Same species; base of the stem with the bulblets; enlarged. 



15. Same species; abulblet; enlarged. 



16. Same species; inner leaves of the bulblets; enlarged. 



17. Saxifraga chrysantha Gr., from Grays Peak (12,500 feet altitude); natural size. 



18. Trifolium nanum Torr., from Grays Peak (12,500 feet altitude); natural size. 



19. Same species; the inflorescence; natural size. 



PLATE 3. 



Fig. 20. Oreoxys humilis Raf., from Pikes Peak (14,000 feet altitude); natural size. 



21. Artemisia scopulorum Gr., from James Peak (13,000 feet altitude); natural size. 



22. Kalmia glauca Ait. var. microphylla Ilook., from Thompsons Canyon on Longs Peak (10,700 feet altitude); 



natural size. 



23. Androsace subumbellata Small, from Grays Peak (12,500 feet altitude); natural size. 



24. Primula angustifolia Torr., from Thompsons Canyon on Longs Peak (10,700 feet altitude); natural size. 



25. Polemonium viscosum Nutt., from Longs Peak (13,000 feet altitude); natural size. 



PLATE 4. 



Fig. 26. Senecio blitoides Greene, from Mount Elbert (12,000 feet altitude); natural size. 



27. Senecio dimorphophyllus Greene, from Mount Massive (12,000 feet altitude); natural size. 

 23. Senecio Holmii Greene, from Mount Elbert (12,000 feet altitude); natural size. 



29. Gentiana plebeja Cham. f. Holmii Wettst", from Mount Massive (12,000 feet altitude); natural size. 



30. Eritrichium argenteum White, from Longs Peak (12,500 feet altitude); natural size. 



PLATE 5. 



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



32. Chionophila Jamesii 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'=the fust 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 is a bud (B), containing a corresponding foliage 

 with an axillary inflorescence. 



36. Synthyris alpine 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 pulvinata Gr., from Grays Peak (13,000 feet altitude); natural size. 



