627 



and approaches forms allied to H. sparsif olium Lbg. , it must thus 

 be regarded as a subalpine form. Both the others, H. epileucoides 

 and H. færoense are closely related to each other. The latter is, 

 moreover, genetically allied to //. stictophgllum Dahlsl. which occurs 

 in the west of Norway, and, again, a form parallel to the latter 

 is developed in Wales, Scotland, and the Shetland Islands. Both 

 the last-mentioned Færoese forms mav wilhout doubt be refer- 

 red to an Atlantic tloral element. With regard then to the two 

 forms: H. Hartzianum and H. Ostenfeldii referred to Alpestria, sub- 

 group Semidovrensia , none of them appear to be connected with 

 the Scandinavian forms of the same group, though the former 

 somewhat resembles H. glaucicolor Dahlst. which occurs in the 

 mountain regions in the south of Norway. Both of them belong, 

 however, to the Alpine floral element. The most interesting of 

 all the Færoese forms, and those which characterize its Hieracinin- 

 flora are those belonging to Cerinthoidea. They are also the most 

 numerous and constitute upwards of one half the number of the 

 forms hitherto known. They would have been in a still greater ma- 

 jority, if I had been able t6 include sorae other forms which oc- 

 curred in the gathering, but which I was obliged to lay aside un- 

 determined o wing to the incompleteness of the material. — Cerin- 

 thoidea is a group of forms which belongs exclusively to the 

 Atlantic region. From the Pyrenees it partly spreads sparsely across 

 the South European Alps as far as Greece, and partly extends along 

 the Atlantic to Scotland. It is plentifully represented in England 

 and especially in Ireland and Scotland, and is also met with dis- 

 persed over the Shetland Islands. Some of its forms occur in Ice- 

 land, and a single species was discovered in the west of Norway. 

 The greater part of the Færoese, some of the Scottish, and both 

 the Icelandic forms belong to a sub- group, which is somewhat 

 modified in habit in conformity with certain Cæsia of Vulgata 

 or with Schmidtii-\ike forms of Oreadea. To this sub -group be- 

 long H. kalsoense, H. leucograptum, H. heterophyllum, H. perintegrum, 

 and H. subrubicundum (forms allied to which occur in Scotland) 

 and H. veterascens which stands in a close genetic relation to the 

 Icelandic H. arctocerinthe Dahlst., and H. mesopolium Dahlst. H. pe- 

 ramplum, H. perampliforme and H. melanochrotum, on the other hånd, 

 come much nearer to the southern, true Cerinthoidea, and forms al- 

 lied to them are also met with in the British I sies, viz. H. anglicnm Fr., 

 etc. As regards H. scoticiforme , the latter belongs to a form-group 



Botany of the Færoes. IQ 



