620 MINNESOTA BOTANICAL STUDIES. 



Calamagrostis langsdorfii (LINK.) TRIN. Unifl. 225. 1824. 



Previously collected from Isle Royale in 1865 by T. C. 

 Porter. This may be the collection reported in Beal & 

 Wheeler's Flora of Michigan as C. lapponica Trin. 



Carex abacta BAILEY, Bull. Torr. Club, 20: 427. 1893. 

 Carex limosa L. Sp. PL 977. 1753. 

 Juncus articulatus L. Sp. PL 327. 1753. 



Sagina nodosa (L.) FENZL, Verbr. Alsin. 18. 1833. 

 Infrequent on moist rocks. 



Sisymbrium humile MEYER, in Ledeb. Fl. Alt. 3: 137. 1831. 

 Rare on rocks. 



Echinopanax horridum (SMITH) DEC. & PLANCH. Rev. Hortic. 



105. 1854. 



The occurrence of this plant in a locality so far removed from 

 what had been considered its native home is certainly remark- 

 able. No collections of it have been reported farther east than 

 the Rocky Mountains of Montana and British Columbia. On 

 Isle Royale it occurs on the rocky cliffs at two places near 

 Tobin's Harbor, i. <?., Passage Island and Black's Point and 

 has the appearance of being indigenous. 



Gentiana rubricaulis SCHWEIN, in Keating's Narr. Long's Exp. 



2 : 384. 1824. 

 Frequent in moist open places and on protected rocks. 



Castilleja acuminata (PURSH) SPRENG. Syst. 2: 775. 1825. 

 Euphrasia americana WETTST. Mon. Euph. 127. 1896. 

 Aster lindleyanus T. & G. Fl. N. A. 2 : 122. 1841. 



Erigeron acris droebachianus (O. F. MUELLER) BLYTT. Norg. 

 Fl. i: 562. 1861. 



Senecio discoideus (HooK.) BRITTON, in Britton & Brown, 111. 

 Fl. 3: 479. i! 



