47 



Art und das Vorkommen saison-trimorpher Arten-Gruppen innerhalb 



der Gattung; Oesterr. botan. Zeitschrift, Jahrg. 1898, N. 2—3, Sep. 



pp. 7-9. 



Rather common on grassy hill-slopes in low-lying regions, some- 

 times also higlier up in the hills, e. g. Bordo: Ilolgafjælcl 4 GO m. (!) ; 

 Vid.: rock-terraces on Mornefjæki, 450 m. (!); Villingedalsfjæld (!). 

 Fl. end of July— August. 



In Murbeck's »Studien« p. 10 var. islandica is mentioned as 

 occurring on Vaago, and Simmons (1896, \. c. p. 73) reports that all 

 he met with belonged to this form. For the purpose of verifying 

 this we collected a large material from all the different localities, 

 wherever it \Yas to be found. Further investigations show that 

 while some of the localities — especially the higher ones — have 

 typical ■■'islandica, other forms, approaching very near to ■'■germanica 

 Murb. are as frequently met with; from some localities (e.g. Sando: 

 Sands, and Vaago: Sandevaag) they are almost Hke typical North- 

 European *germanica. According to Murbeck (Studien p. 12) this 

 latter form also occurs in Shetland, I am therefore of opinion that 

 we liere meet with the first attempt tow^ards differentiating tliese 

 forms. As Murbeck (Alectorolophus, pp. 7 — 9) has fully shown *is- 

 landica is the original form in localities vvhere the period of growth 

 is too short to allow of the development of both spring and au- 

 tumn forms. In the Færoes the autumn form has begun to develop 

 in the lower localities, whilst the original form is still typical in 

 the hills. Thus we see that the development of the autumn 

 form corresponds to the long and warm autumn (see p. 34). 



I have chosen to mention it as ^islandica, because that is the 

 form which is most frequently met with, and also because the 

 transition to *germanica is not quite accomplished. 



24. Menyanthes trifoliata L. 



Found in small lakes, but rather rare. Usually not flowering and 

 very seldom fruiting. 



Landt 1. c. p. 184 mentions that he never saw it in flower, wliile 

 Rostrup 1. c. p. 50 found it flowering everywhere, which taken in con- 

 nection witli our own observations shows that it does not flower regu- 

 larly every year. We observed it on Sando, Syd. and Ost. 

 Fl. end of July. Fr. end of August. 



Order VII. LABIATAE. 



25. Brunella vulgaris L. 



Rather common in low-lying regions, in grassy, fairly dry localities. 

 Fl. July. 



