The Flora ol" Disko Island and Adjacent Coast ol' West Greenland. 117 



V 224. Pirola grandiflora Radius (P. rotiindifolia var. gr. 



AuTT., var. pumila Hook). 



On heath-land, sometimes in thickets and herb-mats. 



Very common throughout the whole area. 



Widely ranging in West Greenland, with northern limit north of 

 79°, however becoming scarce south of 64"" (Ros.); East Greenland 

 scarce. In Greenland a northern type. 



Ranging from the shore as far as dense vegetation is found, not 

 occurring in purely mineralle soil. 



Flowers early and fructificates abundantly. 



Normally covered with snow during winter. 



Not miich varying. At the horders of thickets, especially in the 

 southern parts of the area taller specimens wiuh richer inflorescences 

 occur. Lange has reported a formå liitescens with yellowish petals. I 

 am inchned to consider the piants in question only discoloured her- 

 barium specimens. The petals of all live piants seen by us during many 

 years were pinkish, not pure white as in P. rotiindifolia, nor greenish 

 white. 



By several authors considered an arctic form of P. rotiindifolia, 

 but we think the morphological characters alone sufficient to keep it 

 distinct (see for instance Radius: DePyrola etChimaphila Lips. 1821 — 29, 

 Warming: Bot. Tidsskr. 15 p. 165, Abromeit: Bibi. Bot. 42a p. 47etc.) 

 Its distribution in Greenland shows, that it is of high-arctic, west- 

 ern origin, immigrated to Greenland over Smith' Sound. 



The flowers of Pirola grandiflora are among the most fragrant in 

 Greenland, the smell recalling that of Convallaria majalis. 



Pirola rotundifola L. var. arenaria Lange (an = var. arenaria 



Koch?) 



Under this name is several times recorded a plant from Southern 

 Greenland, ranging from 60° to about 69°. I doubt the identity of the 

 piants seen in H. H. with this European form, and I should rather 

 consider them to be forms of the preceding grown in thickets. 



± 225. Pirola grandiflora X minor n. hybr. 



Aug. 13, 1913 Thorbjørn Porsild collected two specimens of 

 Pirola near the outflow of the springs in the valley Østerdalen on South 

 Disko, 69°15'. He labelled them: '''P. grandiflora, extraordinarily late 

 flowering", as the said species that year everywhere was in f ruiting stage 

 at that date. 



Unfortunately I did not see the piants till the winter 1913 — 14, 

 when the collector had left Greenland, and during the subsequent years I 



