374 THE JOURNAL OF BOTANY 



P. alpinus Balbis. Britain, 1500-3300 ft. ; Switzerland, 6000 ft. ; 

 Austria, 4500 ft. U.S.A. : Colorado, 8400-11,370 ft. 



P.foliosas Eafn. U.S.A. : Utah, 4300-7500 ft. 



P. diver sifolius Eafn. Mexico, 6-8000 ft. 



P. perfoliatus L. Britain, 1100-2300 ft. Asia : Pamirs, 8700- 

 12,350 ft. India : Kashmir, 5-6000 ft. ; Kumoan, 6-13,000 ft. ; 

 Tibet, 8-15,000 ft. N. America, 4000 ft.; Nevada, 9000ft. ; Utah. 



P. crispus L. Britain, 750 ft. ; Tirol, 2000 ft. India : Punjab, 

 3000 ft. ; Kashmir, 5150 ft. ; Pamirs, 12,350 ft. 



P. densus L. Britain, 1020 ft. 



P. obtusifolius Mert. & Koch. Britain, 600 ft. ; N.W. Hima- 

 layas, 9000 ft. 



P. pusilhis L. Britain, 1100 ft. India : Patna, 5180 ft. 



P. pectinatus L. Britain, 600 ft. India : 1000 ft. ; Tibet, 

 15-17,000 ft. ; Pamirs, 13-14,000 ft. U.S.A. : Dakota, 3413 ft. ; 

 Nevada, 6000 ft. S. America : Venezuela, 15,500 ft. 



P. filiformis Pers. Europe, 6500 ft. ; Hautes Alpes. India, 

 7700 ft. ; Pamirs, 13,000 ft. U.S.A. : Nevada, 6000 ft. 



P. latifolius Morong. U.S.A. : Nevada, 4000 ft. 



P. strictus R. A. Phillipi. Chili, " 24° 8' S. lat.," 10,700 ft. 



P. confervoides Eeich. U.S.A. : New Hampshire, 3000 ft. 



P. pamiricus Baagoe (in Vid. Medd. For. Kjob. 181, 1903). 

 x\sia: Pamirs, 13,000 ft. 



P. amblyophyllus Meyer (in Vid. Medd. For. Kjob. 181, 1903). 

 Asia : Pamirs, 8700-12,350 ft. 



P. lucens L. Specimens sent by Dr. Small from Florida 

 (Coll. Messrs. Small and Carter, Nov. 1903) are of a stronger 

 growing form than those of the New England States, but not 

 varying sufficiently to be named ; but others are very distinct, and 

 I propose to name them. 



P. lucens L. var. flobidanus. A very odd form of lucens, 

 characterized by an almost simple stem, with long internodes; 

 leaves lanceolate (2| inches x f inch), the apex excurrent into a 

 short, moderately hard spine, margins strongly undulated ; stipules 

 strong, persistent ; peduncles 6-7 inches long. M Everglades back 

 of Miami, Florida, 17, 11, 1903." The exactly lanceolate leaves 

 are very unlike any lucens forms from the New England States or 

 Canada. In Europe, branches are often thrown off from the 

 flowering-stem with short leaves ; but these are almost invariably 

 rounded at the apex, and quite unlike these Florida specimens. 

 Many Asiatic specimens have these short leaves, but they also are 

 rounded; while others, from Manchuria, have linear-lanceolate 

 leaves drawn out to an acute point at the apex. 



P. natans L., P. polygonifolius Pourr., P. coloratus Horn. 

 Some remarks made in an excellent paper by Mr. West (Proc. B. 

 Soc. Edinb. xxv. 967, 1905) remind me that in the British Flora, 

 ed. 8, 484 (1860), Dr. Arnott disposes of the three as only really 

 one species. Now, if polygonifolius is (as suggested) a degraded 

 natans, how comes it they grow side by side in the Isle of Stroma, 

 each exactly retaining its characters? or why should not the 



