318 Eue Warming. 



21. Viscaria alpina (L.) G. Don. (Fig. 38). 



Styles 4 — 5. 



West and East Greenland. Fragrant flowers (the 

 perfume recalls slightly that of vanilla). Gynodioecism. £ > $. 



£: Protandry with the ordinary movements of the 

 stamens and styles, in three sets, finally homogamy. Self- 

 pollination will be able to take place. Scarcely does the flower 

 begin to open, then the cal. -anthers are seen at the throat. 

 The stigmatic papillæ occur only on the upper half in a con- 

 tinuous row, but farther down small ones occur at intervals. 

 During the flowering period the stamens are thrust far out 

 and are exposed, so that they are quite bared to the effects 

 of rain and dew (Fig. 38, A). The pollen-grains are greenish 

 and ordinary in structure (numerous pores; Fig. a 1 ). 



Protogyny occurs; at first the styles spread out and 

 then curve backwards; their papillæ are bigger than those 

 in the protandrous flower. Then the cal.-st. spread out, and 

 finally the cor.-st. But this is very probably a form transitional 

 to $. In the same inflorescence I found both quite sterile 

 flowers and also protogynous ones with stamens partially 

 abortive. 



$: Seem to be much rarer than £. Even before the flower 

 is fully expanded the apices of the styles project beyond the 

 throat (Fig. G). 



The following figures show the relation, between the g 

 and the $: — 



£ Petals 972—11 mm in length. 



$ — 67 2 — 8 — 



£ Corolla about 10 — 12 mm in diameter. 



$ — 7—8 — 



Ç Corolla-tube (up to the scales at the throat) 4 — 5 mm. 

 - ( — — — 37 2 mm. 



In $ the anthers of the stamens may be quite transpa- 



