‘“‘thallo pendulo flexuoso subsimplici angulato cinereo- 
pallido, angulis acutis scabris, fibrillis horizontalibus approxi-. 
matis simplicibus brevibus tereti-attenuatis.’’ 1. ¢. 
Type in the Acharian Herbarium, Helsingfors. 
2. LIachen barbatus Linn. = articulata Hoffm. 
‘“Americae septentrionalis.’’ Pennsylvania. (Spec. Pl. 
Delos kos) 
“*filamentosus pendulus subarticulatus, ramis patenti- 
pee CO: 
Type in the Linnean Herbarium, Linnean Society, Lon- 
don. 
8. Usnea californica. Herre. 
‘““head of Alpine Creek Cafion,’’ San Mateo Co., Califor- 
“nia. (Proc. Wash. Acad. Sci. 7: 345. 1906.) 
““Thallus large, stout, terete, much elongated and pendu- 
lous, smooth; the coarse branches irregularly divided and 
widespread, readily traceable nearly to the extremity of the 
plant; secondary branches long and sub-divided; sparsely 
clothed with fibrils; branchlets and fibrils occasionally soredi- 
ate; color gray-green to yellowish green. Fruiting speci- 
mens rare; apothecia borne on second branches, terminal or 
lateral, small to medium size; concolorous or tan.’ 1. ¢. 
Type: No. 194, Stanford University Herbarium. 
4. Usnea cavernosa Tuck. 
‘‘in oris Lacus Superioris.’’ (Agassiz and Cabot, Lake 
Superior, ete. 71. 1850.) 
‘“Thallo pendulo laxo molli glaberrimo tereti conreso 
plus minus cavernoso ochroleuco, ramis primoribus simplici- 
usculis subventricosis attenuatis ad apices dichotome ramo- 
sis, ramulis ultimis tenuissime capillaceis; apotheciis sessili- 
bus radiatis disco 2IO.UG WEE PDB demum subcarneo margine 
obscuriori evanescente.’’ 1. ¢. 
Type in the Tuckerman Herbarium, Botanic Museum, 
Cambridge. Mass. 
5. Usnea trichodea var. ciliata Mill. Arg. 
Dallas, Tex. (Flora 60: 77. 1877.) 
bus. 
17 
