HARRIMANELLA, A NEW GENUS OF HEATHERS 573 



Japan ; and one, 7nertensiaiia^ is confined to northwestern North 

 America. Three species of Cassiope, therefore, are found on the 

 American continent, tetragona^ lycopodioides^ and mertensia7ia. 



The species which must be exchided from both Cassiope and Harri- 

 manella is C. oxycoccoides Gray.* Our whole knowledge of this plant 

 is based on a single flowering twig 43 mm. long, collected by Dr. 

 Leonhard Stejneger August 22, 1SS2, on the northern shore of Bering 

 Island, off the east coast of Siberia, on "a rounded hill, about 300 feet 

 high, just behind the fishing settlement of Saranna." An examina- 

 tion of the specimen, which is in the Harvard University Herbarium, 

 shows that it differs in various ways from both Cassiope and Harri- 

 manella. Its leaves are situated in whorls of three and very closely 

 resemble broad ^leaves of Cha7naecistiis froctimbeiis. They are, 

 however, smooth on the back between the midrib and margin and they 

 have an apical gland similar to that of Vaccbtiiim vltisidaea. The 

 three pentamerous flowers are borne on short bibracteolate pedicels in 

 a tribracteate umbel on a short terminal peduncle. The calyx does 

 not differ from that of Harrimanella, while the corolla is of the urceo- 

 late short-lobed form found in Cassiope. The style is cylindrical as in 

 Cassiope, but the stamens differ from those of both Cassiope and 

 Harrimanella. In both these genera the pollen pore, the two awns, 

 and the point of attachment of the filament are close to the apex of 

 the anther, but in the plant under consideration the filament is attached 

 to the base of the anther, only the two awns and the pollen pores being 

 apical. Although the fruit is unknown, the whorled character of the 

 leaves and the structure of the stamens give reason for a surmise that 

 the plant belongs to the Ericeae instead of the Andromedeae. Appar- 

 ently, however, it is not congeneric with any known species of the 

 Ericeae. Its corolla is not chartaceous ; it is a depressed plant barely 

 projecting above the mosses and lichens among which it grows ; its 

 leaves have peculiar apical glands ; and it is geographically isolated 

 from the rest of the Ericeae, none of which are known from either 

 northeastern Asia or northwestern America. I venture to propose for 

 it the generic name Arcterica, the whole name being Arcterica 

 oxycoccoides (Gray). It is greatly to be desired that future travelers 

 visiting Bering Island procure a good series of both flowering and 

 fruiting specimens of this rarest of plants. 



The two Cassiopes which are now referred to Harrimanella may be 

 distinguished as follows : 



'Gray, Proc. Am. Acad. 20: 300. 1885 (Jan. 26); GrayMn Stejneger, Proc. 

 * U. S. Nat. Mus. 7 : 534. 1SS5 (Jan, 27). 



