—so- 



convinced by niy experience that there probably remain still further interesting 

 finds of this sort to be made. Grandfather Mt. and Roan Mt. are the most 

 favorable localities for these species. Roan Mt. Inn is too far distant for a con- 

 venient base, and I owe it to the kindly hospitality of members of the Wilder 

 family, owners of a large part of the mountain, who were spending the summer 

 near the summit, that I was able to do any justice at all to this mountain's re- 

 markable flora. 



Of the species noted before it may be remarked that Mctzgena crassipilis 

 (Lindb.) Evans is in all the region traversed the common species of its genus, 

 as was rather suspected from the previous material. It grows on rocks and on 

 bark of trees, often developes a great mass of the gemmae described and figured 

 by Evans,'^ by which as well as by the breadth and outline of the thallus it can 

 easily be distinguished at sight from M. conjugata Lindb., which is hardly so 

 common in that region, though I saw it a few times and even colleected it fruiting 

 on a large rock in the valley of Woodfin Creek. 



The Hcrherta adunca (Dicks.) Gray of my former list has since been in- 

 cluded by Evans^ in his species, H. tenuis. I tried in vain to find fertile speci- 

 mens of the plant. The conditions under which it grows were carefully noted. 

 I found it only on mountains whose altitude reached the spruce and balsam zone, 

 that is generally speaking on mountains of over 6000 feet. On shaded perpendic- 

 ular rocks in the upper regions of such mountains it grew abundantly. Grand- 

 father does not quite reach 6000 feet, but its great development of cliflfs makes 

 r.p for its lower altitude. In the Roan Mountain and the Balsam Range spruce 

 and balsam were lacking on the summits falling short of 6000 feet and on such I 

 saw no Herberta, though it occurred on the higher summit region of both Roan Mt. 

 and Jones Knob. On Grandfather Mt. there was great abundance of it. On 

 Roan Mt. I took a specimen from the Tennessee side, which adds a state to its 

 distribution, but it was better developed on the North Carolina side. 



The Porella plaiyphylla (L.) Lindb. of my former list is in the light of Evans' 

 subsequent study* apparently all referable to M. platyphylloidea (Schwein.) 

 Lindb., which seems to be our common form. It grows fairly abundantly on the 

 bark of trees in our southern mountains. 



Lejeunea Ruthii (Evans) was first described^ from Tennessee alone, but in 

 1912 its author reported a station , from North Carolina.^ I subsequently re- 

 corded it from Atkinson's collections in that state on the basis of scattered plants 

 growing among other bryophytes on the bark of trees. I found it myself in 

 something more nearly approaching a pure culture on the slope of the Blue Ridge 

 below Grandmother Gap, where the Lejeuneae were unusually richly represented. 



Of further hepatics which in Atkinson's material represented extensions of 



^ Annals of Botany, XXIV, 282 ff. 1910 ; cf. also Rhodora, XI, 188 f. 1909. 

 sTorrey Bull., XLIV, 219. 1917. 



4 Rhodora, XVIII, 109 ff. 1916. 



5 Evans, Lejeuneae of United States and Canada, 161. 1902. 

 ^ The Bryologist, XV, 62. 



