—59- 



British Columbia: Asulkan Valley, Brinkman 230, 231. i. 52a; Chilliwack 

 Lake, 1901, /. M. Macoun 9; Lewis Island, northeast of Perdier Island, Frye 

 1149, 1161, 1166. 



, Some of the specimens listed grew on rocks, as in eastern North America, 

 while others grew on logs or tree-trunks. 



7. Bazzania ambigua (Lindenb.) Trevis. Mem. 1st. Lomb. 13: 414. 1877. 

 Mastigobryum ambiguum Lindenb. (in part); G. L. N. Syn. Hep. 217. 1845. 



The history of this species is much like that of B. denudata and has already 

 been briefly narrated by the writer. 1 Soon after its publication it was rede- 

 scribed and figured by Lindenberg and Gottsche,- but subsequent writers, almost 

 without exception, have either ignored it altogether or included it among the 

 synonyms of B. tricrenata. Lindenberg based his species on two specimens — 

 one from Massachusetts and the other from our northwest coast. Since the second 

 specimen evidently served for Lindenberg and Gottsche's figures of Mastigobryum 

 ambiguum and since it agrees with a widely distributed plant of the Pacific coast 

 region it seems justifiable to typify the species by this specimen, rather than by 

 the specimen from Massachusetts, which probably represented B. denudata. A 

 list of the specimens examined by the writer follows. To these may be added a 

 portion of the type-material in the Mitten Herbarium, now in the possession of 

 the New York Botanical Garden. The species prefers tree-trunks and logs but 

 occasionally grows on rocks. 



Alaska: Aats Bay, Frye 908; Augustine Bay, Frye 590 (in part); Exchange 

 Cove, Frye 279; Farragut Bay, Brewer & Coe 620 (in small part); Hot Spring, 

 Trelease 1489 (in small part) ; Lake Bay, Frye 210; Morse Cove, Frye 452; Nichols 

 Bay, Frye 368; Point Malmsbury, Frye 982; Port Alice, Foster 785, 786 (in part, a 

 somewhat doubtful form); Port San Antonio, Frye 606; St. John Harbor, Foster 

 865; Shipley Bay, Frye 763, 774; Sitklan Island, Frye 30; Swifts Cannery, Frye 

 690; Tarn Gas Harbor, Frye 119, 134, 136, 148; Wrangell, Foster 2472 (in part). 



British Columbia: Comox (or Hastings), J. Macoun (distributed in Can. 

 Hep. 16, as B. deflexa); Lewis Island, northeast of Percher Island, Frye 1162- 

 1164; Port Renfrew, Miss Gibbs 35, 52, 60, 139, 158; same locality, Miss Hone 

 247; Revelstoke, /. Macoun 241; Skidegate, Queen Charlotte Islands, Spread- 

 borough 83167 (in part); Swanson Bay, Frye 1131, 1133; Ucluelet, /. Macoun 

 14, 13, 43, 46, 49, 34, 82, 106 (some of these specimens are not typical and ap- 

 proach " Pleuroschisma tricrenatum var. implexum"~). 



Washington: Cascade Mountains, 0. D. Allen 19; Montesano, Grant 

 2048; upper valley of the Nisqually River, 1895, 0. D. Allen 8 (with perianths 

 and capsules); Pacific Beach, Foster 1407, 1450; South Bend, Frye 2040; Aber- 

 deen, Foster 907; Hamilton, Foster. 



Oregon: Silverton, Foster 131 5. 



Most of these specimens have already been recorded by the writer or others 

 under the name B. tricrenata (or one of its synonyms). Some of the published 



1 Rhodora 25: 94. 1923. 



'Spec. Hepat. Mastigobryum 9. pi. 3 (upper part). 1851. 



