10 VEGETATION IN COLORADO-HOLM [memoirsnat ,o»al 



P. dissecta Pursh. On dry rocks: Longs Peak; Mount Massive, 12,000 feet. 

 P. fruticosa L. Very seldom Alpine: Near Stevens's mine and Grays Peak, 11,000 feet. 



Sibbaldia procumbens L. Frequent, especially near the snow banks: GrayB Peak; Mount Massive, 12,000 feet; 

 Thompsons Canyon, 10,500 feet. 



LEGUMINOSAE. 



Trifolium nanum Torr. (pi. 2, figs. 18-19). On dry rocks: Pikes Peak, 14,000 feet; Grays Peak, 12,500 feet. 



T. Parryi Gr. On grassy slopes, quite frequent: James Peak, 13,000 feet; Grays Peak; Mount Elbert; MountMassive, 



12,000 feet; Thompsons Canyon on Longs Peak, 10,500 feet. 

 T. dasyphyllum T. et Gr. In bowlder fields: Longs Peak, 12,000 feet; grassy slopes of James Peak, 13,000 feet; Mount 



Massive; Mount Elbert, 12,000 feet. 



VIOLACEAE. 



Viola bellidifolia Grne. (pi. 1, fig. 1). In damp moss at Black Lake in Thompsons Canyon on Longs Peak, 10,300 feet. 



ONAGRACEAE. 



Epilobium Homemannii Reich. Very rare on grassy slopes of Grays Peak, 12,000 feet. 

 Chamaenerium latifolium (L.) Spach. Very rare: Grassy slopes of Mount Kelso, 12,000 feet. 



UMBELLIFERAE. 



Angelica Grayi C. et R. Frequent in thickets of willows along brooks: Mount Massive, 12,000 feet; Mount Kelso, 



11,590 feet. 

 Pseudocymopterus montanus C. et R. Abundant on grassy slopes of Mount Massive, 11,500 feet. 

 Oreoxys humilis Raf. (pi. 3, fig. 20). Rare: On dry slopes, Pikes Peak, 13,740 feet. 

 O. alpina C. et R. Rare: Among rocks on Grays Peak, 13,000 feet; James Peak, 13,000 feet. 



ERICACEAE. 



Vaccinium caespitosum Michx. (pi. 7, figs. 54-55). Not uncommon on Mount Massive, 12,000 feet. 

 V. Myrtillus L. Infrequent in swamps: Thompsons Canyon on Longs Peak, 10,500 feet. 

 V. Myrtillus L. var. microphyllum Hook. (pi. 7, figs. 56-58). With the preceding. 

 Arctostaphylos TJva ursi L. Seldom Alpine: Dry, stony slopes of Mount Massive, 12,000 feet. 



Kalmia glauca Ait var. microphylla Hook. (pi. 3, fig. 22). Rare: Swamp in Thompsons Canyon on Longs Peak, 10,500 

 feet. 



PRIMULACEAE. 



Primula angustifolia Torr. (pi. 3, fig. 24). On dry slopes, infrequent: At Bear Lake in Thompsons Canyon on Longs 

 Peak, 10,700 feet; Mount Elbert; Mount Massive; Grays Peak, 12,000 feet; James Peak, 13,000 feet. 



P. Parryi Gr. Abundant along Alpine brooks and in damp crevices of rocks: Thompsons Canyon on Longs Peak, 10,500 

 feet; Mount Massive; Grays Peak, 12,000 feet; near the snow banks, headwaters of Clear Creek, 11,500 feet. 



Androsace Chamaejasme Koch. In damp ground at Bear Lake in Thompsons Canyon on Longs Peak, 10,700 feet. 



A. subumbellata Small, (pi. 3, fig. 23). Very scarce in dry ground: Mount Massive, 12,000 feet; Grays Peak; Longs 

 Peak, 12,500 feet. 



GENTIANEAE. 



Gentiana frigida Hnke. Frequent: On dry rocks, Mount Elbert; Longs Peak, 12,000 feet; in damp, gravelly soil, 

 Grays Peak, 12,000 feet; near the snow banks, headwaters of Clear Creek, 11,500 feet; in thickets of Salix glaucops 

 And., from Stevens's mine to Grays Peak, 11,500 feet. 



G. plebeja Cham. var. Holmii Wettst. (pi. 4, fig. 29). Rare: Swamp in Thompsons Canyon on Longs Peak, 10,500 feet; 

 grassy slope, Mount Elbert; Mount Massive, 12,000 feet. 



Swertia perennis L. Very rare along brooks: Grays Peak, 12,000 feet. 



POLEMONIACEAE. 



Phlox caspitosa Nutt. var. condensata Gr. Abundant on bowlder fields: Longs Peak, 12,000 feet. 



Polemonium viscosum Nutt. (pi. 3, fig. 25). Infrequent: Bowlder field on Longs Peak, 13,000 feet; Pikes Peak, 



13,700 feet. 

 P. confertum Gr. Not uncommon on grasBy slopes, Mount Kelso, 12,000 feet; Mount Massive; near the snow banks on 



Mount Elbert, 12,000 feet. 

 P. ingratum Grne. Very rare in bowlder fields on Longs Peak, 12,500 feet. 



HYDROPHYLLACEAE. 



Phacelia sericea Gr. Very rare on grassy slopes of Mount Kelso, 12,000 feet. 



