274 Morten P. Porsild. 



Caudex superficialis, caulibus vegetativis dense aggregatis, rosulatis, 

 stolonibus prostratis nullis. Folia lanceolato-spathulata, saepe apiculo mu- 

 cronata, 10 — 25 mm longa, 1 — 4 mm lata, glaberrima vel interdum pilis 

 sparsis et rudimentariis munita, rarissime in pagina inferiore aliquot folio- 

 rum lanugo interrupta et perspicua araneoso-floccosa inventur. Caulis flo- 

 ralis 8 — 10 cm, rarissime ad 12 cm altus, glaberrimus, tenuissimus, calathio 

 solitario vel binis. Calathia magna, diametro 8 — 12 mm. Folia involucri 

 glaberrima, externa basi viridia, superne scariosa, obscure olivaceo-fusca, 

 margine lacerata, interna tota longitudine scariosa. Flosculi feminei tan- 

 tum. Pappi radii setif ormes, 5 — 6 mm longi, 50 — 60 p. crassi, sat grosse 

 denticulatis, dentibus arrecto-patentibus, maximis ad 60 ц longis. Generatio 

 apogama, progenies in nature orta her editarie constans. 



Differt ab A. alpina proxima notis supra praedicatis. 



A. glabrata is most often very conspicuous. As all the points which 

 differentiate it from A. alpina are variable in the latter species, it might 

 be considered incorrect to look upon it otherwise than a variation of 

 A. alpina, and when I nevertheless take it as a distinct species, or at 

 least as a species in the making, the reason is, that the plant under natural 

 conditions keeps manifestly constant. 



It is often found near or together with A. alpina, therefore its varia- 

 tions are not due to ecological conditions ; when found in the same loca- 

 lity as A. alpina, it is always smaller and more slender; often it forms 

 large, nearly pure colonies of a shape which plainly shows, that they have 

 originated from one single plant, whence they have spread, regulated by 

 the directions of the local winds, or by the flow of the melted snow. 



Vahl's type specimen is from Lyngmarken near Godhavn on South- 

 Disko, since then it has often been found there, and can still be met 

 with. On the whole it is not rare on South-Disko, although considerably 

 less frequent than A. alpina. In West-Greenland it is found in numerous 

 localities between latitudes 64° and 72°20', and in East-Greenland between 

 66° and 72°. As many of the most southerly parts of Greenland have 

 been closely examined by investigators, who knew the plant, without 

 their finding it, it is possible, that its distribution is not identical with 

 that of A. alpina. As far as I know, it has so far not been reported 

 from other countries than Greenland. 



It flowers at about the same time as A. alpina, and develops fruits 

 in abundance. Even small seedlings developed under natural conditions 

 (2 — 3 years old, with 4 — 6 rosulate leaves) as well as by cultures (cotyle- 

 dons and the first foliage leaf) differ from similar plants of A. alpina 

 by the lack of felt. 



3. Antennaria groenlandica n. nom. 



Syn.: A. dioeca var. hyperborea Lange: Consp. fl. groenl. , 1880, 

 pag. 100, non Gnaphalium hyperboreum Don. (See Fig. 6). 



Caudex adscendens, caulibus vegetativis partim aggregatis, rosulatis^ 



