61 



found by the writer in the northern regions here covered, <>r 

 sent to him by others, are described briefly to keep the con- 

 tinuity of the systematic arrangement of the genus. Readers 

 are referred to the earlier paper, and to the authorities there 

 cited, for fuller descriptions. Species not listed in the earlier 

 paper are described more fully here. In the photographs at the 

 end of this paper the illustrations are confined to the species 

 not previously pictured, except a few cases where robust forms 

 of the north woods, of species found in the club range, are pre- 

 sented. The list here presented is not a complete one for the 

 region, and many of the species of the club range not found there 

 in or received therefrom, by the writer, doubtless extend north- 

 ward, and further search would disclose them. Northern species 

 ward along the mountains, probably even south of the Torrey 

 Botanical Club range, and southern, or Middle Atlantic coastal 

 plain species, found in the New Jersey Pine Barrens or on Long 

 Island, probably extend into southern Maine, or perhaps into 

 Nova Scotia, through migration along the now submerged 

 Continental Shelf. 



Subgenus 1. Cladina (Xyl) Vain. Primary thallus crustaceous, soon dis- 

 appearing, rarely seen. Podetia slender, one to six inches tall, or taller 

 still farther north; much branched, arachnoid-tomentose, without cor- 

 tex, or with a close or scattered warty surface of gonidia (tuberculous 

 masses of algal cells); tips of branches with two to eight minute forks, 

 usually brownish; apothecia small, circular, rare, brown. Usually 

 densely branched and entangled, often in large colonies, sometimes two 

 or more species in the same colony. Grayish, grayish-white, or grayish 

 green, or bright green in shade or olive-brown in sun. Commonly known 

 as "Reindeer Mosses." 



Podetia in dense, irregularly entangled colonies. 



Podetia often polytomous (many-branched) with whorls of three or more 

 branches surrounding gaping axils; outer podetial layers persistent. 

 Podetia ashy-gray, darker in old plants; or sometimes brownish or green- 

 ish; surface arachnoid, KOH+, yellowish. 



1. C. rangiferina 



Podetia yellowish-green, varying to gray, whitish or greenish, more deli- 

 cate than the preceding, KOH — ; frequent sub-secund (on one side) 

 branches between the whorls of branches on the main axes; outer branches 

 often curving in one direction, apices nodding, tips 3-8 pointed; gonidia 

 grayish, greenish or brownish, interspaces tomentose. (PI. 1, f. 2.) 



2. C. sylvatica 



