129 



From this account and picture we may understand how the 

 " knees " appear when the tree is grown in England. The article 

 includes a general review of the recent discussion of " knees " by 

 American botanists. 

 Ergot in i?>^g. — Prevalence of . Erwin F. Smith. (Journ. My- 



col. V. 202-204). 



ErysiphecB of Montana. — A Prelijninary List of the. F. W. An- 

 derson. (Journ. Mycol. v. 188-194). 

 A list of twelve species, with their host plants. 



ErysiphecE upon Phytoptus Distortions. F. W. Anderson and 

 F. D. Kelsey. (Journ. Mycol. v. 209, 210). 



Eiipatorium prohnm. N. E. Brown. (Gard. Chron. vii. 321, 



fig. 48). 



This species is here described as new, with the information 

 that it has been known in cultivation for twenty years, having 

 been introduced from Peru about 1870, and yet has remained 

 undcscribed until the present time. 



^/ 



On Certain Peculiarities in 



the. J. W. Fewkes. (Am. Nat. xxiv. 216-224). 



The present flora of the Santa Barbara Islands is believed by the 

 author to most nearly resemble the former flora of the adjacent 

 mainland, prior to the time when this latter was modified by recent 

 climatic changes. It is supposed that many species suffered 

 almost or complete extinction in the struggle for existence with 

 the plants driven southward by the cold of the ice age, and west- 

 ward by the gradual desiccation of the arid regions, whereas the is- 

 land flora would be exempt from these influences. The signifi- 

 cant fact is noted that many plants which are only represented by 

 a meagre number on the mainland, are abundant on the islands, 

 and the genus Lavatera is said to be represented by four species 

 on the island of Santa Cruz, while there is not another species 

 known on the American continent. Similar facts in the zoology 

 of the islands are also noted. Where isolated colonies of the in- 

 sular flora have been found on the mainland, they may be sup- 

 posed either to be the last remnants of the original stock, or pos- 

 sibly a recent incipient colonization from the Islands. 

 Pungi.— North American. Part III. A. P. Morgan. (Journ. 



Cin. Soc. Nat. Hist. xii. 163- 172, PI. XVI. Reprinted). 



