28 CEUCiFKE-s:. \_Thlaspi. 



Frequent on the borders of lakes and rivers in the middle and 

 north of Ireland. 



\Ar7mracia rusticana (Eupp.), Horse Eadisk, occurs occa 

 sionaUy in waste ground, but is not native.] 



\Camdina sativa (Crantz) and C, feetida (Fries) are fre- 

 quently found growing as weeds among flax ; but there is no 

 doubt that they are unintentionally sown with the crop.j 



THLASPI. 

 1 1 T. arveuse (Linn.) — Penny Cress. 

 Districts 1-345 6--- 10 -12 

 Lat. 51°-56°. East of Ireland, chiefly.- 

 Type in Great Britain, British, inclining to English. 



Cultivated land and roadsides ; very rare. Fl. May to Aug. 



1. At Ardagh, near Rosscarbery; Flor. Cork. — 3. Side of 

 the road between Ballybracken and Kilkenny; Fhr, HU). 

 Near Freshf ord, Kilkenny ; Bev. S. Madden. Clonmore Castle, 

 Carlow; Mr. T. Ckandlee. — 4, Murrough of Wicklow; B. M. 

 Bray, "et alibi copiose;" Wade, Dubl. — 5. Dundrum; J). M. 

 South side of the Hill of Howth; Flor. Hib. Glasnevin, 

 Finglas, Blackpits, Raheny ; Ir. Flor. Clogher Head, Louth ; 

 Mr. J. Ball. — 6. In the Great island of Arran, in Galway Bay; 

 Prof. Melville. — 10. LoughgaU, Armagh ; A. (?. M. — 12. Near 

 Dundrum, county Down ; Flor. Hib. Newcastle and Donagh- 

 adee Pier ; Flor. Ulst. Belfast ; Ballycastle ; Red Bay ; Fhr. 

 Ulst. At the base of Umbra Rocks, Derry; D.M. Magilligan; 

 Prof. E. Murphy. By the side of the Crumlin river, near Lough 

 Neagh; D. M. Railway bank atGlenavy ; Mr. S. A . Stewart. 



[HutcMnsia petrcea (R. Br.) still grows on the walls of the 

 Mathew Cemetery at Cork, formerly a Botanic Garden, 

 where it has been known as naturalized for many years. See 

 Flor. CorJc.'] 



LEPIDIUM Linn. 

 1. Ii. campestre (R. Br.) — Common Pepper-wort. 

 Districts 123 -5---- 10 -12 

 Lat. 51°-56°. South, East, and North of Ireland. 

 Type in Great Britain, British, inclining to English. 



Cultivated fields and way-sides ; rare. Fl. June to Aug. 



