THE BRYOLOGIST 
VoL. XI U 
March 1910 
No. 2 
LICHEN NOTES No. 14. 
Two New Cetraria Forms and Three New Combinations. 
G. K. Merrill. 
I. Cetraria Oakesiana var. spinulosa Merrill, var. nov. 
Thallus moderately spreading, sub-decumbent but the fertile lobes 
commonly ascendent, greenish or glaucous, cartilagineous, often rigid 
laciniate-lobate, the lobes variable in length, rather plane, borders sinuous, 
undulate, sometimes crisped; above slightly uneven or rugulose, sub-shin- 
ing, marginally beset with scattered or abundant very short or sometimes 
moderately elongated dentate spinules, or some of the lobes sorediate in the 
manner of the species; within white; below whitish-fuscescent or brownish, 
sub-shining or opaque, here and there rugulose, with coarse fuscous rhizinae 
conspicuously developed at the point of contact with the substratum. 
Apothecia rather infra-marginal, concave at first with a rather thickened 
rugulose incurved margin, finally more or less explanate, the margin con- 
tinuing as in the juvenile states or even with the disk, epithecium chestnut, 
shining, the back of the receptacle rugulose. Spores simple, globose or 
sub-ellipsoid, in eights, 5-6/q spermatia cyclindrical, straight, very slightly 
thickened at one end, spermogones situated in the swollen tips of the 
spinules. 
On twigs, of Ka/mia latifolia and Picea rubra^ “ Cranberry Glades,’' 
Pocahontas County, W. Virginia. J. L. Sheldon, Aug. sandy, 1909. Plate 
II. Fig. 2. 
The present is unmistakably near to C. Laureri Kremplh. Flora (1851) 
p. 673. Platysma complicatiim Nyl. Syn. (i860) p. 303. ' The apothecia are 
affixed at the tips of the plane linear lobes in the same manner, and the 
margins of the lobes are likewise spinulose. The description of C. 
Oakesiana in Tuckerman’s 1848 Synopsis p. 17, mentions that the species may 
have “ black-ciliate (or more commonly pulverulent)” margins. Whether 
this means that the author was acquainted with the form here described is 
not knovvn. I have examined no specimens of C. Oakesiana provided with 
cilia, and the v. spinulosa is dentate-spinulose, not ciliate. In the 1882 
Synopsis Tuckerman omits mention of ciliate conditions of C. Oakesiana, 
and he disclaims having found spermatia. 
The January Bryologist was issued January 8, 1910 . 
