Praeger — On Types of Distribution in the Irish Flora. 13 



Being the furthest removed fi'om Ireland as regards not only actual 

 distance, but soil and climate, it is to be expected that this should bo 

 the type least numerously represented in this country, and such is tho 

 case. Out of 102 "Germanic" plants in England, only thirteen are 

 enumerated in the Irish flora, and four of these cannot be reckoned in 

 the certainly indigenous list. The list is as follows ; the extent of 

 range of the members of the group in Ireland is so variable, that after 

 each species the number of divisions in which it is known to occur is 

 added, in order to illustrate this feature. 



Germanic. 



*'Crepis tiennis, 13. Scirpus triqueter, 2. 



"f taraxacifolia, 18. Glyceria Borreri, 2. 



Polygonum mite, 4. 



Germanic-British. 

 Astragalus Hypoglottis, 1. *Senecio viscosus, 1. 



Germanic- English. 



JGalium erectum, 8. Teucrium Scordium, 7. 



Hypopithys mnltiflora, 6. Orchis pyramidalis, 38. 



Limosella aquatica, 2. Bromus erectus, 9. 



This is, in Ireland, distinctly a calcicole group of plants. All but 

 two — Crepis biennis and Polygonum mite — are confined to limestone 

 districts or to limy sea-sands. Leaving out of account the two 

 " certainly introduced " species, Crepis biennis and Senecio viscosus, as 

 their range is devoid of phy to- geographical significance, and giving 

 the remaining two dubious natives the benefit of the doubt, the 

 distribution of the group works out as shown in fig. 7, next page. 



Here the maximum is 8 species in Clare, the minimum in Tyrone. 

 Our scale is 0-1, 2-3, 4-5, 6-7, 8- 9 species. The group is seen to attain 

 its maximum in Clare, S.E. Galway, andDublin; while the only divisions 

 in which more than one species occur are certain counties in which 

 limestone largely predominates. This result is significant, even though, 

 when dealing with the distribution of so small a number of plants, it 

 is unwise to lay too great emphasis on present results. The fact is 

 that, as a group, the Germanic plants have no place in the Irish flora ; 

 such stragglers as have foiind their way here have a distinctlj limestone 

 range. 



