8 VEGETATION IN COLORADO-HOLM. [MemoirS [vol.Tix; 



C. rigida Good. Very rare: Near the snow banks, headwaters of Clear Creek, 11,500 feet. 



C. scopulorum Holm. Seldom Alpine: In swamps from Steven's mine to Mount Kelso and Grays Peak, 12,000 feet. 



C. chimaphila Holm. Along brooks: Longs Peak, 12,000 feet. 



C.elynoidesHolm. Not infrequent on dry slopes: Mount Massive; Mount Kelso, 12,000 feet. 



C. rupestris All. Very scarce: Dry slopes of James Peak, 13,000 feet; Mount Elbert; Longs Peak, 12,000 feet; Grays 



Peak, 12,500 feet. 

 C. nigricans C. A. Mey. Thompsons Canyon on Longs Peak, 10,500 feet. 

 C. pyrenaica Walenb. Bowlder fields: Grays Peak, 13,000 feet; Longs Peak, 12,000 feet. 

 C. misandra R. Br. Very rare: Along brooks on Grays Peak, 12,000 feet. 

 C. capillaris L. (pi. 7, fig. 66). Abundant, but very small, at Bear Lake in Thompsons Canyon on Longs Peak, 10,700 



feet. 



JUNCACEAE. 



Luzula spicata D C. Frequent in dry ground: Grays Peak; James Peak, 13,000 feet; Longs Peak, 12,500 feet; Mount 

 Massive; Mount Elbert, 12,000 feet; headwaters of Clear Creek, 11,500 feet. 



Juncus Parryi Engelm. (pi. 7, fig. 59). Abundant near snow banks; headwaters of Clear Creek, 11,500 feet; Thomp- 

 son's Canyon on Longs Peak, 10,500 feet. 



J. Drummondii E. Mey. Common on grassy slopes: Mount Massive; Mount Kelso, 12,000 feet. 



J. biglumis L. Very rare, along brooks on Longs Peak, 12,000 feet. 



J. triglumis L. With the preceding; also on Grays Peak, 12,000 feet. 



J. castaneus Sm. Along brooks, in thickets of Salit glaucops: Grays Peak; Mount Kelso, 12,000 feet. 



J. Mertensianus E. Mey. Along brooks: Mount Kelso, 12,000 feet. 



LILIACEAE. 



Lloydia serotina Reich. Abundant on grassy slopes: James Peak, 13,000 feet; Mount Massive, 12,000; Thompsons 



Canyon, 10,500 feet. 

 Zygadenus glaucus Nutt. Very seldom Alpine: Thompsons Canyon, 10,500 feet; in swamps. 



SALICACEAE. 



Salix petrophila Rydb. James Peak, 13,000 feet; near snow banks, headwaters of Clear Creek, 11,500 feet; Thomp- 

 sons Canyon, 10,500 feet. 



S. reticulata L. (pi. 6, figs. 42-53). Infrequent: Grassy slopes on Mount Massive, 12,000 feet: Mount Elbert; Mount 

 Kelso, 11,500 feet. 



S. chlorophylls Ands. Near Steven's mine, Mount Kelso, 11,000 feet. 



S. glaucops Ands. Common along brooks: Mount Massive; Mount Elbert, between 11,000 and 12,000 feet; Mount 

 Kelso, 11,000 feet. 



BETULACEAE. 



Betula glandulosa Michx. Seldom Alpine: At Bear Lake in Thompsons Canyon on Longs Peak, 10,500 feet. 



POLYGONACEAE. 



Eriogonum flavum Nutt. Seldom Alpine: Among rocks on Torreys Peak, 12,000 feet; on grassy slopes of Mount 



Massive, 11,500 feet. 

 Polygonum viviparum L. Frequent: James Peak, 13,000 feet; bowlder fields on Longs Peak; Mount Massive; Mount 



Kelso; Mount Elbert; Grays Peak, 12,000 feet. 

 P. bistortoides Pursh. Abundant on grassy slopes: James Peak, 13,000 feet; Mount Massive, 12,000 feet. 

 Oxyria digyna Campd. Frequent among rocks: Longs Peak, 12,500 feet; Mount Kelso; Mount Elbert, 12,000 feet. 



PORTOXACACEAE. 



Claytonia megarrhiza Torrey . Frequent, but only at the highest elevations among bowlders: Grays Peak; Pikes Peak, 

 from 13,000 feet upward. 



Calandrinia pygmaea Gr. (pi. 1, figs. 8-9). Near the snow banks on Mount Kelso; Mount Massive, 12,000 feet; head- 

 waters of Clear Creek, same elevation. 



ILLECEBRACEAE. 



Paronychia pulvinata Gr. (pi. 5, fig. 41). Very rare, but evidently overlooked: On dry, stony slopes of Grays Peak, 

 13,000 feet. 



CARYOPHYLLACEAE. 



Silene acaulis L. Frequent in the Alpine region: James Peak, 13,000 feet; Grays Peak; bowlder fields on Longs 



Peak, 12,500 feet; Mount Massive; Mount Kelso; Mount Elbert, 12,000 feet. 

 Lychnis montana Wats. (pi. 1, figs. 2-A). Rare: Grays Peak, 12,000 feet; bowlder fields on Longs Peak, 12,000 feet; 



Pikes Peak, 14,000 feet. 



