1906] Bartlett, Juncus compressus in the Province of Quebec 233 



the names Hosackia micranthus and H. prostratus appear, while in the 

 reprint these names are corrected to H. mierantka and H. prostrata. 

 Page 329 of the original bears the number 42, but this is omitted 

 in the reprint. The title-pages of several copies of the work show 

 no indication of a second issue, and why this substitution was made 

 or at what date I am unable to state. — Howard W. Preston, 

 Providence, Rhode Island. 



Juncus compressus in the Province of Quebec. — - A rush which 

 Mr. A. S. Pease found growing abundantly on the Plains of Abraham 

 near the city of Quebec, 30 Aug.-l Sept., 1904, has been determined 

 as J%inmis compressus Jacq. This plant, a close relative of the common 

 "black grass" of our salt meadows, is common in inland situations 

 throughout the greater part of Europe and Asia, but has not been 

 reported from America. Although probably introduced on the Plains 

 of Abraham, it is a rush which might be expected to occur as a native 

 in northeastern America, since in general its distribution is parallel 

 to that of a number of rushes of broad range which have been found in 

 the maritime provinces and northeastern states. 



The characters by which Juncus compressus may be distinguished 

 from the black grass, Juncus Gerardi Lois., are somewhat technical. 

 In Juncus compressus the anthers are little if at all longer than the 

 filaments, in Juncus Gerardi they are thrice as long; in Juncus com- 

 pressus the style is much shorter than in Juncus Gerardi; in Juncu.s 

 compressus the sphaeric-obovoid capsule is conspicuously longer than 

 the outer tepals, whereas the ellipsoid capsule of Juncus Gerardi is 

 usually about the same length as the tepals. A strong tendency, 

 which cannot, however, be relied upon to separate the plants, is for 

 the primary bract to be longer than the inflorescence in Junciis com^ 

 pressus and shorter in Juncus Gerardi. — H. 11. Barti>ett, Gray 

 Herbarium. 



