360 JTTNCAC^M. [Jmcus. 



In Britton and Brown's Illustrated Flora of the Northern United 

 States, i8g6 ( Vol. I. p. 386), ttis interesting plant is set down as 

 occurring "almost throughout North. America" and as "now 

 migrating to all parts of the world." On the European Continent 

 it has already been ohserved in Sweden, Denmark, Prance, Ger- 

 many, Worth Italy, and West and South Hussia, and is admittedly 

 introduced in some of its stations. The earliest record for the 

 Continent dates from 1869, the earliest for Great Britain, from 

 1863, when it was discovered in Eenfrew. The fact that it wa& 

 first detected in Ireland only so recently as 1889 cannot be accepted 

 as a strong argument against its admission as a native, since it is 

 only of late years that a systematic survey of the flora of Eerry and 

 South Cork has been undertaken. !N"either can its predilection for 

 old roads and beaten tracks in South-West Ireland be urged against, 

 its claim to native rank, since these are precisely the habitats it 

 affects in North America. Tet, on the whole, it seems best to 

 regard the plant as an introduction in Ireland, though here a 

 positive decision is even more difficult to arrive at than in the case 

 of Sisyrinchium angustifolium. 



5. J. glaucus Ehrh. — Ba/rd Rush. 



Districts I. II. III. IV. Y. VI. VII. VIII. IX. X. XI. XII. 

 Lat. 62°-55i°- Throughout Ireland. Type, English-British. 



Lowland. Damp, grassy places; frequent and locally abun- 

 dant. Fl. July. Calcicole £. 



Bare in many parts of the country and not recorded, so far,, 

 either for S. Cork or S. Kerry. 



6. J. eflFasTis Linn. — Loose-flowered Rush. 

 Hibernioi Luacap {Zoo-aeh-ar). 

 Districts I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XII. 



Lat. 51i-°-56i°. Throughout Ireland. Type, British. 



Wet and marshy places ; common. Fl. July-August. 



Sea-level in N. Antrim and S. Cork. To 2150 ft. in Donegal 

 {Sort); to 2800 ft. in Wicklow {N. C). 



J. conglomeratus Linn. 



Districts I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XII. 



Lat. 51^°-66i°. Thi'oughout Ireland. Type, British. 

 "Wet and marshy places ; common. Fl, July-August. 



