538. S. globiferous, (Linn.) DC.
Labrador or Newfoundland. (Waghnne fide Eckfeldt.) Arctic America. (Herb. Hooker.) On earth in bogs, Salt Lake, Anti-costi, Que.; on trees in bogs and on rocks at Truro, N.S.; on rocks, summit of Mount Albert, Gaspé Co., Que.; on trees at Hastings, Burrard Inlet, B.C.; on trees at Nanaimo, Vancouver
Island. (Macoun.) On rotten logs, Johnson's Strait and Thur-low Island, Gulf of Georgia, B.C. (Dr. G. M. Dawson.) St. Paul and St. George islands, Behring Sea; Port Etches, Alaska, and Carmanah Point, Vancouver Island. (J. M. Macoun.) Loring; also at Salmon Creek, Juneau, Alaska. (Miss G. Cooley.) St. Matthew Island, Port Mulgrave, and on the Shumagin Group, Alaska. (Rothrock.)
539. S. compressum, Ach.
Rocks and on earth in alpine districts.
Arctic America. (Richardson.) On rocks, Cape Chudleigh, Digge's Island and Cape Prince of Wales, Hudson Strait. (Dr. R. Bell.) On trees Burnside Road, Victoria, Vancouver Island. (Macoun.)
540. S. fragile, (Linn.) Pers.
Labrador or Newfoundland. (Waghorne fide Eckfeldt.) Northward to Arctic America. (Hooker.) On rocks St. Paul Island, Behring Sea, June 28th, 1897. (J. M. Macoun.) On earth at the forks of Old Wives' Creek, Assa., June 1st, 1895. (Macoun.)