INTEODUCTIOJSr. 



Ixix 



number of its Sieraoiwm species and forms, and of its Scottish, and 

 Intermediate type plants which may he taken as representing the 

 boreal element in our flora. Out of a total for all Ireland of 29 

 species and forms of Sieracium, District XII. has 26 against 15 in 

 Donegal, while the number of the Scottish and. Intermediate type 

 plants taken together is 49 in XII., to 43 in XI., out of a total of 

 60 for all Ireland. There are 10 peculiar species, of which the 

 most interesting are Adoxa Mosohatellina and Ca/rex Buxhaumii, both, 

 it is to be feared, on the verge of extinction. 



Characteristic or Hare Plants. 



Ranunculus fluitans. 

 Barbarea intermedia. 

 Cardamine amara. 

 SUene aoaulis. 

 Areuaria Terna. 

 Mlatme Mydropiper. 

 Geranium sylvatioum. 

 G. pratense. 

 Vicia Orobus. 

 V. lathyroides. 

 Eubus chamsemorus. 

 Dryas octopetala. 

 Eosa hiierniea. 

 S. glauca. 

 Saxifraga Hirculus. 



Saxifraga aizoides. 



Epilobium angustif olium. 



Cicuta virosa. 



Carum Terticillatum. 



liigusticum sooticum. 



Adoxa Mosohatellina. 

 t Galium Cruciata. 



Saussurea alpina. 



Pyrola media. 



P. minor. 



P. secunda. 

 XSottonia palustris. 



Mertensia maritima. 



Myosotis collina. 



Melampyrum sylvaticum. 



Orobancbe rubra. 

 Atriplex farinosa. 

 Salix nigricans. 

 Spiranthes Bomanzoffiana. 

 Typha angustifolia. 

 *Acorus Calamus. 



Carex paueifiora. 

 G. Buxiaumii. 

 0. aquatilis. 

 Calamagrostis striota. 

 Cryptogramme crispa. 

 Polypodium Dryopteris. 

 Equisetum pratense. 

 PUularia globulifera. 



IX. BoTAJsricix Map op Ieelaitd. 



The map issued with this work is designed to serve two pur- 

 poses, first to mark the precise limits of the Irish Botanical Districts, 

 second, to show clearly the range of the more interesting plants, 

 especially the Hibernian Type species discussed in Section IV. of 

 the Introduction. The manner ia which the twelve districts are 

 defined on the map needs no explanation ; but the significance of 

 the curved lines of distribution may not be apparent to all. These 

 lines are intended to show the eastern limits of the various plants 

 selected for this graphic treatment. Thus Urioeaulon septangula/re 

 is only found in those parts of the island lying to the westward of 

 the long sinuous line marked with its name ; Salenaria intaota, only 

 to the westward of the shorter and more abruptly curved luie 

 marked with its name, and so on with the other species so treated. 

 It is scarcely necessary to say that the. range of each species within 



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