210 Remarks on the disease called the Yellou'S, 



are the only species not given in the Florida Bostoniensisj 

 with which I am acquainted. 



Of Cyperus we have seven species, including C. castaneus 

 of the Florula Bostoniensis. Several more interesting Cype- 

 ri, detected by Mr. Oakes on our southern islands, and else- 

 where in the Commonwealth, may possibly yet be added to 

 our Boston list. 



Eriophorum is well represented by E. alplnum, (which 

 is abundant in a swamp on the Concord turnpike,) E. virgini- 

 cum, E. polystdchium^ and E. angustifolium. 



Of Rhyncospora we have three species, R. glomerdta, 

 R. fusca^ and R. alha, the first by far the most common. 



Clddium mariscoides Torr., though apparently a very rare 

 plant here, still occurs at Bigelovv's station, in Cambridge. 



Dulichium spathdceum Pers., is common in wet grounds. 

 There are two, if not three, species of Scleria in the State; 

 and a Fuirena has been discovered by a Mr. Greene, at 

 Tewksbury, and the same form at Plymouth by Mr. Oakes 

 and myself; but I believe neither of these genera can be in- 

 cluded in our Boston catalogue. It is, however, not impossi- 

 ble that both these, and the curious Psilocdrya of Torrey, 

 also a Plymouth plant, may yet be found nearer Boston. 



Cambridge, April 13, 1841. 



Art. III. Some remarks upon the disease called the Yellows, 

 which attacks the Peach tree. By R. Sinclair, Clair- 

 mont Nursery, near Baltimore. 



T HAVE noticed occasional useful remarks on the best va- 

 rieties and the culture of fruit trees, in your valuable Maga- 

 zine; but I have not, as yet, seen any remarks upon the 

 disease called the yelloics, which affects the peach tree, or 

 reasons assigned for its prevalence. If the cause could be 

 found out, it might lead to a cure, which would render a last- 

 ing benefit to our country. However valuable most other 



