ADDITIONS TO THE FLORA. OF WASHINGTON. 127 



Fam. 2. VEKRUCARIEI. 



Staurothele difractella, Tuck. 



" Drummondii, Tuck. 



" umbrina, Tuck. 



Trypethelium virens, Tuck. 

 Sagedia lactea. Kbr. 

 " oxyspora, Tuck. 



" cestrensis, Tuck. 



Verrucaria epigsea, Ach. 

 " margacea, Nyl. 



" nigrescens, Pers. 



" rupestris, Schrad. 



" muralis, Ach. 



Pyrenula thelena, Tuck. 

 " micula, Fl. 



" punctiformis, Naeg. 



fallax, Nvl. 

 " gemmata, Naeg. 



" hyalospora, Tuck. 



" glabrata, Mass. 



" Santensis, Nvl. 



" nitida, Ach. 



lactea, Tuck. 

 " subprostans, Tuck. 



" falliciora, Nyl. 



" leucoplaca, Kbr. 



" thelomorpha, Tuck. 



IV. CHANGES IN NOMENCLATURE. 



[The recent published works of Drs. Gray and Vasey have made necessary many changes 

 in the nomenclature of our species. It has been suggested that these changes be deferred 

 \intil the publication of a second edition of the " Flora,'- but this has seemed to be inadvis- 

 able, as it must bo some years before a second edition can be brought out, if ever, and if we 

 are constantly confronted by the old names we shall never become familiar with the new and 

 correct ones.] 



295. Ribes rotundifolium, Michx., = Ribes oxycanthoides, Linn. 



Pointed out by Mr. Walter Deane, of Cambridge, who has 

 carefully compared it at the Gray Herbarium. 

 395. Eupatorium pubescens, Muhl., = Eupatorium rotundifolium, L., 



var. ovatum, Torr. 



