— 95 - 
P. olivaria f. cetrarioides (Del.) Merrill. 
P. cetrarioides (Del.) Nyl. in Flora (1869) p. 290. 
Reaction Kt orange, me. K(C)-|- reddish. 
With difficulty separable from the preceding on any aspect except its 
behavior with reagents, and no better definition is practicable. This asser- 
tion applies to those conditions of the plant commonly met with. In large 
series of examples forms of considerable diverseness from typical P. olivaria 
may be found, but such authentic foreign material as has been examined 
leaves us with the conviction that the extremes of variation should not be 
made to furnish factors for diagnosis. Students are warned not to accept in 
a plant under examination furnishing a similar reaction, such as evidence of 
affinity with the present for there are several Parmelia forms belonging 
with other sections affording the same reaction. On trees. 
3626, Leamington, Essex Co., Ont. ; 572, Truro, N. S. J. Macoun. 
P. proboscidea Tayl. in Mack.. FI. Hibern. II. (1836) p. 143. 
Reaction Kf, Cl, me. K(C)-j- faint red. 
Thallus cartilagineous, loosely appressed, orbicular, whitish or pale- 
glaucescent, irregularly divided, the lobes convex or plane, subimbricate, at 
the periphery unequally rounded or sometimes angulate-crenate, the margins 
of the lobes throughout more or less recurved-ascendent, ciliate, above 
smooth and uniform, esorediate and destitute of isidia; within white, below 
black, at the circumference brownish, or yellowish or sometimes whitish, and 
glabrous, centrally more or lessrhizinose. Apothecia large, cupshaped, ses- 
sile or at length sub-pedicellate, imperforate, disk chestnut or lighter, with 
an entire or subcrenulate margin, the exterior of the exciple faintly reticu- 
late-rugose. Spores ellipsoid I 1 - On trees. 
584, British Columbia. J. Macoun. 
P. crinita Ach. forma pilosella (Hue) Merrill. 
P. pilosella Hue Causerie sur les Parm. p.,22. 
Reaction K+ oran s e ’ Cl K(C>~ 
Thallus commonly membraneous but sometimes thickened, greenish or 
ashy-glaucous, irregularly divided, often profoundly lobate, the laciniae 
convex at the centre, more or less plane at the circumference, centrally 
coalescent, at the periphery entire and rounded, or lacinulate, the margins 
crenateor lacerate-crenulate and ciliate; above opaque, more or less rugulose, 
invested centrally with isidia interspersed with short black cilia, the tips of 
the isidioid excrescences sorediate or not; within white, below black, opaque 
or at the margins narrowly testaceous and shining, interruptedly short-rhiz- 
inose. Apothecia rather large, pedicellate, cup-shaped, without perforation, 
chestnut or lighter, the margin faintly crenulate. Spores ellipsoid a. 
On trunks. 
536, Central Ontario Junction. Ont. ; 3633, Southampton, Ont. ; 588, 
Brighton, Ont. ; 3628, Bruce Peninula, Ont. J. Macoun. 
P. crinita of Tuckerman's Synopsis appears to include a number of 
forms by others considered as distinct. There is scarcely anything to dis- 
tinguish the present from P . crinita except the black fibrils of the upper sur- 
face, the color of the thallus, and habit of growth. What Tuckerman has 
termed the southern P. crinita seems to be the plant of Acharius. 
P. crinita forma varians Merrill f. nov. 
Reaction K+ orange ’ Cl, me. K(C)+ intense red. 
Scarcely differing from the species except in color and reaction, and 
without the superficial garniture of cilia as in f. pilosella. 
3828, Carleton Place, Ont. J . Macoun. 
The specimen marked P . crinita issued with Dr. Fink’s Iowa Lichens 
belongs here. Rockland, Maine. 
