- 5 8- 



such a way that the basal row of leaf-cells is left attached to the stem, either 

 wholly or partially. The new plants arise either from the marginal cells or from 

 the cells along the line of separation, the latter origin being the more frequent, 

 but it is unusual to find more than one new plant attached to a single leaf. The 

 new stem grows out in the same plane as the leaf and soon develops rudimentary 

 leaves of its own, each consisting of only a few cells. The method of vegetative 

 reproduction just described is similar to that found in Bazzania denudata and 

 some of its allies. 



There are no other North American species with which M. cuneifolia is 

 likely to be confused. The lanceolate underleaves might perhaps bring to mind 

 those of Harpanthus scutatus (Web. & Mohr) Spruce, and D. Moore 1 once ex- 

 pressed the opinion that the Mylia might perhaps turn out to be a species of 

 Harpanthus, if sexual plants should ever be discovered. Aside from the under- 

 leaves, however, the two species have little in common. Harpanthus scutatus 

 is a larger and greener plant, the leaves are distinctly bifid with sharp lobes, 

 and vegetative reproduction is by means of gemmae borne on the reduced leaves 

 of specialized shoots. 



6. Bazzania tricrenata (Wahlenb.) Trevis. 



In listing stations for this species from eastern North America 2 the writer 

 had seen no specimens from farther south than New Hampshire and Vermont. 

 He has since had the opportunity of studying, at the New York Botanical Garden, 

 some of the material distributed by Sullivant in the Musci Alleghanienses, under 

 the name Herpetium deflexum. This material, Nos. 252 and 253, was issued as 

 vars. 1 and 2. The habitat is given as, "In montium editiorum saxis irroratis," 

 referring presumably to the mountains of North Carolina. In the writer's 

 opinion both specimens represent a rather slender form of the true B. tricrenata 

 and thus extend markedly the known range of the species to the south- 

 ward. Other specimens from the mountains of Virginia and North Carolina, 

 representing similar slender forms, are cited in the list below, and this is followed 

 by a list of specimens from western North America. The species is still unknown 

 from the more central parts of the continent. 



Virginia: summit of White Top Mountain, Small 54 (in part). 

 North Carolina: Yonahlossee Road, side of Grandfather Mountain, 

 Andrews 52; summit of Jones Knob, Andrews 24; Mt. Pisgah, Schallert; Grand- 

 father Mountain, Schallert 19 (in part). 



Alaska: Aats Bays, Frye 935; Augustine Bay, Fry e 543, 571, 590 (in part); 

 Exchange Cove, Frye 278; mouth of Hidden Inlet, Frye 63, 86; Lake Bay, Frye 

 210 (in small part); Port Alice, Foster 786 (in part); Port Wells, 1899, Trelease 

 1531; Ratz Harbor, Frye 298; Shipley Bay, Frye 762; Sitka, 1894, U. S. Fish 

 Commission; Snug Harbor, Rigg 1221; Tarn Gas Harbor, Frye 213 (in small part) ; 

 Verdure Creek, Frye 23 (in part). Most of these stations have already been 

 listed by the writer. 3 



1 Proc. Roy. Irish Acad. II. 2'. 646. 1877. 



2 Rhodora 25l 76, 77. 1923. 



3 See especially Bull. Torrey Club 4tll 598. 1915. 



