Holzinger : mosses at high altitudes. 741 



10. Orthotrichum laevigatum Zett. 



An abundantly fruiting plant, common from 13,000 to 14,000 

 feet. I had determined this as O. Kingianum, since there is in 

 this moss a double peristome, the cilia being as long as the 

 teeth, formed frequently of two rows of cells. But Mrs. E. G. 

 Britton, our best authority on Orthotrichum, determined it as 

 O. laevigatum. 



11. Orthotrichum sp. 



Only a small sod was collected of this plant. Mrs. Britton 

 refers the plant to O. Killiasii C. M., with a doubt. 



12. Encalypta vulgaris Hedw. 



Only a little was collected of this species near the 13,000 feet 

 level. But it is quite common from there down the mountain. 



13. Webera elongata Schw. Sterile. 

 At 13,000 feet to 13,500 feet altitude. 



14. Webera elongata var. humilis Sch. 



At about the same altitude, less common than the species. 



15. Webera nudicaulis Lesq. 

 Above 13,000 feet altitude. 



Another species of Webera was collected in considerable 

 quantity, but is not identifiable, being sterile. 



16. Pogonatum alpinum Roehl. Sterile. 

 On ground at 13,000 feet altitude. 



17. Polytrichum striatum Menz. Sterile. 



On ground, alone and mixed with Distichium, at 13,000 to 

 13,500 feet altitude. 



18. Polytrichum piliferam Schreb. Sterile. 



Mixed with the sterile Webera mentioned under No. 15. At 

 13,000 feet elevation. 



19. Pseudoleskea rigescens Lindb. Sterile. 



Near the top of the peak, at 14,000 feet altitude. The plant 

 was compared with material from Idaho collected by Dr. J. H. 

 Sandberg in 1892, and agrees perfectly with it. 



