864 



THE AMERICAN NATURALIST [Vol. XL 



(h) Species going below 11,000 feet (31 species):— 



Det<chatnpsin nlpicola Rydb. 

 Poacrorata (Goes below 8000.) 



Fcduca hmrlnipfn/lla Schultes. 

 Carcx/rsi;n, 1 )ewev. { 1 )own toGoOO.) 

 C. prta.nta VU.yvy. 

 Juncus druwmondli ^ley. 

 Salix ylnucops Anders. (Down to 

 7000.) 



Alsinopsis propinqua ( Hicliards). 

 A. obtusiloba Rydb. 

 Androsace carinata Torrey. 

 Anthopogon elegans (A. Nelson). 

 Phacelia sericea Hook. 

 Castilleja rhexifolia Rydb. (Down 



to 7000.) 

 Solidago ciliosa Greene. 

 Antennaria media Greene. 

 Drabn crassifolia Graham. 

 Rhodiola integrifolia Raf. 



Heuchera parvifolia Xutt. 

 Muscaria ddicatida Small. 

 Leptasea austrntnontana (Wieg.). 



(Down to GOOO.) 

 Potentilla quinque folia llvdh. 

 P. dissecta Pursh. 

 P. uniflora Ledeb. 

 P. rubripes Rydb. 

 Atelophragma elcgan.^ (Hook.). 



(Down to 7000.) 

 Linnwa amcriram, F..rb<«s. 



Senecio columhituiDs ( hvvuv. (Down 



to 5000.) 

 S. purshianus Nutt. (Down to 



6000.) 



Agoseris amanUaca (Hook.). (Down 



to 6000.) 

 Taraxacum scopulorum (Gray). 



The two species of Alsinopsis are modifications of well known 

 circunipohir types. A. propinqua has been considered identical 

 with A Ismopsir'i hirta {Arenaria hrta Wormsk.), which has itself 

 been placed as a variety of Alsimpsn^ vcrna (Arenaria vcrna L.). 

 A. ohiusiloha, which my wife obtained in abundance on Arapahoe 

 I'cak. ( olo.. on .^ept. 1 of the present year, is a segregate from 

 Alsinop.sts .s-(ij(inrn.si.s {Arenaria sajanensis \Nill(l.). Sedum 

 stninprlahiiit Pul■^h. is given by Rydberg as onlv up to 12,000; 

 but niv wile tound it iar above timber hne on Arapahoe Peak- 



(21 ^iiecies winch do not extend beyond the United States, 

 la) ^j)tcies not reported below 11,000 feet (35 species):— 



