Johnson and Hensman — Agricultural Seeds, 6fe. 



451 



he records 164 have been introduced into the county by human agency 

 more or less directly. 



The list published by Miss M. 0. Knowles in the Irish Naturalist for 

 1906 (vol. XV., pp. 143-150), under the title " A Contribution towards an 

 Alien Flora of Ireland," is, so far, the best account we have of "casuals" 

 in the Irish flora. 



Up to the present one finds occasional reference only to the agricultural 

 seed sown as the cause of the presence of an alien in the crop. The object of 

 this paper is to show from what particular agricultural seed and region the 

 alien weed comes, and also to indicate how the alien flora of Ireland is being 

 added to from the agricultural seeds sown. The lists include the names of 

 the weed-seeds found in the more important agricultural seeds tested by 

 the Station. Certain weed-seeds remain uuidentifled. It will be necessary 

 for identification to examine the plants in flower, got by sowing these 



Perennial Eye.* 

 Serrafalcus Jiordeaceus, Grren. & 

 Godr., .... 

 {Bromiis mollis, L.). 

 A Setaria glaiica, Beauv., 

 Holcus lanatus, L., . 

 Festuca hromoides, L., 

 „ sciuroides, Roth. 

 A° Tradescantia virginiana, L., 

 Luzula campestris, DC, 

 Rumex crispus, L., . 



Soft Brome Grrass. 



Pigeon Grrass ; Yellow Foxtail. 

 Yorkshire Fog. 

 Squirrel-tail Fescue. 



Spiderwort. (N. A.) 

 Field Wood-rush. 

 Curled Dock. 



(E. E.) 



*AliBUETIATIONS. 



A = Casual or alien, already recorded in the " Hand-List of Irish Flowering Plants and Fems," 



hy Miss Knowles and myself. 

 A°= Seed of casual found in sample, hut not yet in the flora of Ireland, 

 t +* Mean "possihly," " prohahly," " certainly," introduced, as applied to species recorded in the 



Hand-List. 

 The following letters in brackets after a name refer to Stebler's regions in which the species 

 are indigenous, andirom which the seeds originally came : — 



(I.) = Found in all or nearly all parts of (S. & M. E.) = South and Mid-Europe. 



Ireland, (N. A.) - North America. 



(E.) = Europe. (S. A.) = South America. 



(E. E.) = East Europe. (N. Afr.) = North Africa. 



(W. E.) = West Europe. (M. Asia) = Mid-Asia— (now in cultiyation 



(M. E.) = Mid-Europe. in Germany). 



(S. E.) = South Europe. (N. Z.) = New Zealand. 



(E. & M. E.) = Europe and Mid-Europe. Eurasia = Europe and Asia. 



