b CHLORIS BOREALI-AMERICANA. 



tation, to the genus Empetrum itself. His faithful description, al- 

 though drawn from less perfect specimens than we now possess, 

 leaves little to be added, except the account of the fruit, which was 

 then unknown. He did not fail to notice its agreement in habit 

 and some points of structure with the Empetrum album, Linn., the 

 Corema of Don.* Had the latter plant been known to him other- 

 wise than by an imperfect and faulty description, the agreement 

 would certainly have been more insisted on. 



In the autumn of 1840, Mr. W. Gambell gave me good speci- 

 mens of this plant, which he had gathered the preceding spring on 

 the rocky banks of the Kennebec, in the neighbourhood of Bath, 

 Maine. For the discovery of this station, I believe we are in- 

 debted, not to Mr. Nuttall directly, as has been stated, f but to 

 his enterprising young friend and pupil just named. Previously to 

 this, however, namely, in 1838 and 1839, the Plymouth locality 

 had been brought to notice by Mr. Russell, Mr. Gilbert, Mr. 

 Tuckerman, who identified it with the Empetrum Conradii of Tor- 

 rey, and Mr. Oakes, by whom the ripe fruit was first detected. 



Specimens having been communicated by Mr. Tuckerman to 

 Dr. Klotzsch of Berlin, this botanist was led to study the plant, 

 and to propose its establishment as a new genus, which he very ap- 

 propriately dedicated to Mr. Tuckerman. In the detailed generic 

 character of Tuckermania by Klotzsch, the nature of the fruit was 

 first made known. J The seed, however, was not examined ; its 

 structure, and that of the embryo, have been left for me to sup- 



* Annals of the Lyceum of Nat. Hist, of New York, I. c, p. 86. 



+ London Journal of Botany, Vol. I., p. 445. 



J " Fructus parvus, drupaceous, siccus, depresso-globosus, tri- abortu dipyrenus, 

 pyrenis cartilagineis monospermis. Semen ? " Klotzsch, in Erichs. Archiv., I. c, 

 p. 250. 



