Cornaceæ. 



135 



cyme, surrounded by four yellowish-white involucrals, by 

 which, as is well knovsTi, the whole inflorescence gets the 

 appearance of one single big flower, with four petals. Each 

 flower has a short stalk, about 2 mm long; the sepals are very 

 small, and the petals, of which one is often elongated, have 

 a dark red-violet colour, and are turned sideways. The style 

 is surrounded at its base by an annular brown disc; the 

 stamens are turned to the side in the spaces between the 

 petals. 



Fig. 2. Cornus suecica. 



Л — E^ÎTom West Greenland, (Sukkertoppen, ICth August); Л, Flower in bud ("Д), Б, 

 Flower in full bloom (just opened) ; C, Anther, not open ("/i) ; D, Anther, open |(^Vi) 



E, Discus, seen from above (-*/i) ; F—K from Northern Norway (Tromsø, 24th July) (^'^/l) 



F, Flower with one anther (to the left) open ('»/i) ; G, The elongated petal (see fig. Л) 

 H, Part of style with stigma ; J, Empty anthers, pollen apparently on stigma ; K. Same 

 but filaments more curved ; L, Two pollen grains, from Northern Norway (Bosekop) (""/,) 



{Л—К, Eug. Warming del.). 



Concerning specimens from "Sukkertoppen" Warming 

 writes in his notes from Greenland: "Slight protandry is 

 noticed. *, Simultaneous with the opening of the petals, 

 the stamens extend and the anthers open, but the stigma 

 is not yet fit to retain the pollen; when this shortly after- 

 wards happens, the anthers are still full of pollen and self- 

 pollination possible, though I think, not easily, by reason of 

 the spread of the filaments (Fig. 2 B, F); as the flowers 



