— 40 — 
* Ramalina farinacea f. pilosella (Hue) Merrill. 
* Stereocaulon coralloides Fr. 
Stereocaulon paschale (L.) Fr. 
Nephroma laevigatum Ach. 
* Cladonia multiformis Merrill. 
* Cladonia cristatella Tuckerm. 
Cladonia verticillata v. evoluta Fr. 
Cladonia squamosa f. denticollis (Hoffm. ) Flk. 
Cladonia gracilis v. dilatata (Hoff m. ) Wain. 
Cladonia furcata v. scabriuscula f. adspora Flk. 
Cladonia sylvatica (L.) Web. f. laxiuscula Del. 
* Cladonia gracilis (L.) Willd. v. elongata (Jacq. ) Flk. Rare. 
Cladonia furcata (Huds.) Schrad. 
Cladonia furcata (Huds.) Schrad. v. pinnata (Flk.) Wain. sub. w.foho- 
losa Del. 
* Sticta pulmonaria (L.) Ach. 
* Sticta fuliginosa (Dicks.) Ach. [Uncommon but widely distributed, 
G. K. Merrill.]. 
Sticta scrobiculata (Scop.) Ach. 
* Sticta amplissima (Scop.) Mass. 
* Sticta crocata (L.) Ach. 
Sticta sylvatica (L.) Ach. [A plant so rare that my herbarium, contains 
no North American representative, G. K. Merrill.], 
*Physcia hispida (Schreb.) Tuckerm. 
*Physcia stellaris (L. ) Tuckerm. 
Physcia speciosa (Wulf. Ach.) Nyl. 
Usnea barbata (L. ) Fr. between w.florida and v. dasypoga Fr. 
* (Jmbilicaria aphthosa (L.) Hoffm. v. papulosa Tuckerm. 
* Leptogium tremelloides (L. fib) Fr. 
* Theloschistes parietinus (L. ) Norm. 
The above were determined by Mr. Merrill, the following by Miss Miller: 
Cladonia furcata scabriuscula (Del.) Wainio. 
Cladonia pyxidata chlorofhaea (Spreng.) Flk. 
Cladonia sylvatica (L.) Hoffm. 
Cladonia sylvatica sy Ivestris (Sed.) Wain. 
Parmelia' Borreri hypomela Tuckerm. 
Parmelia pertusa (Schrank) Schaer. 
Parmelia saxatilis (L .) Fr. 
Parmelia saxatilis sulcata Nyl. 
Peltigera polydactyla (Neck.) Hoffm. 
Peltigera scut at a (Dicks.) Leightf. 
Ramalina pusilla (Prev.) Tuckerm. 
Ramalina pusilla geniculata Tuckerm. 
Washington, D. C, 
