199 



A sterile plant in the collections of the Hassler Expedition, called 

 by Tuckerman, ''Alectoria, perhaps a new species," is said to 

 be Cetraria epiphorella, Nyl. Lich. Fueg. p. 20, but according to 

 Muller in ** Lichenes Spegazziniani " (Nuovo Giornale Bot Ital., 

 Jan. 1889) this is C, aculeata van gracilenta, Krenipelh, Exot 

 Flechten, p. 315 (1868). 



The name Ertoderma velligemm. Tuck. Syn. ii. 143, is 



changed on grammatical grounds to E. vellerigeriun, Pertitsaria 



colobina. Tuck. 1. c. 149, hardly differs from P. cucurbitida. 



Opcgrapha rohustida Is a new species from Chili. (9. atra, Pers., 



from the Straits of Magellan; ArtJionia subdispersula,\N\\h the 

 preceding. 



Biiellia Cataivbensis, Willey, which had been called by Ny- 

 lander a Dermatiscttm and had a place among the Lecanorei next 

 to Rinodina, is here restored to its original place in the Lecidei, 



H. W. 



Contributions totvards a Flora of CaitJmess. By J. F. Grant and 

 Arthur Bennett. (Pamph. 8 vo., pp. 41; Perth, 1889; re- 

 printed from the ** Scottish Naturalist) " 



This is a record of plant stations in the most northern coun- 

 try of the mainland of Scotland, made up from observations and 

 collections by the authors as well as by numierous other botanists. 

 A feature of the catalogue is the entire omission of authors' 

 names after the species. 



Index to Recent American Botanical Literature. 



Aerating Organs on the Roots of Swamp and other Plants. Wm. 

 P. Wilson (Proc. Phil, Acad. Nat. Sci., April 2 ; reprinted, 



PP- 3) 



From extended studies of the '' knees " of the Bald Cypress 



[Taxodinm distichnni) Professor Wilson concludes that they serve 

 3-s structures to aerate the subaqueous and subterranean portions 

 of the tree. He states that when cultivated in dryer soils it never 

 forms the knees. Among other plants mentioned which produce 

 similar structures he records Indian Corn {Zea Mays), the Pond 

 Pine of the South {Pijitis seroiina), the Water Tupelo {Nyssa 

 ^quatica) and the Mangrove {Avicennia nitida). 

 ^igen aiis Fenerland und Patagonia, J. B. DcToni (Hedwigia, 



