68 Morten P. Porsitp. 
1 120. Alnus Alnobetula (Enru.) Harr. var. repens (WormMsks.) 
WINKL. (A. viridis var. A. ovata var.). 
Recorded from Ikert6g-Fjord 66°45’ (V.), but not re-found. 
A southern type known in West Greenland from 61° to 66°. 
XVII. Polygonaceae. 
| 121. Oxyria digyna (L.) Hix. 
On fell-field in moist places often in the melting-water from the 
snow-fields. In the lowland at water-courses, in berb-mats and among 
stones on the talus. 
Very common throughout the whole area. Widely distributed in 
Greenland with neither northern nor southern limit. 
Abundantly flowering and fruiting. 
To be sure normally covered by snow during winter. 
A 122. Rumex Acetosella L. 
In rather dry gravelly soil, on heath and in crevices. Few and 
scattered occurrences, but, when occurring, usually in great quantities. 
Disko: Recorded from Godhavn 69°15’ by Hart, but during many years 
searched for in vain. On the other hand, European specimens of the species oceur. 
rather commonly, as introduced weeds. This form is easily distinguished from the 
Greenlandic, for instance, by the decumbency; European ruderal plants in Green- 
land are usually decumbent, quick-growing and cannot survive hibernation. 
Perhaps the specimen found by Harr, belonged to this form. 
The north limit of the Greenlandic form lies in the inner part of Nordost- 
Bugten (from a few places (V.)). Rather continuous it occurs along the coasts of 
Disko-Bay from Ata 69°45’ (P.) down to Sydost-Bugten:; here the habitats lie close 
together. Westward to Egedesminde, but in the archipelago neither seen by Kruvuse 
nor by us; in N. Stromfjord and its branchings common (P. & E.). — 
From the district of Holsteinsborg recorded from Ikert6q-Fjord (V.); Maligiag 
66°58’ (P. & E.). 
A southern type; south of the area to be found here and there, 
and south of 61°30’ common (ROSENVINGE). 
Flowers and fruits abundantly. 
Probably covered by snow during winter. 
Polygonum islandicum Metsn. (P. aviculare L. var. boreale LANGE). 
. Occasionally observed at the settlements throughout the whole area; by us 
only seen at Qegertagq 1914, about 70° (P. & E.). 
Here it conveyed the impression of an introduced weed, it was flower- 
ing, but hardly fructificating before the arrival of the winter. On the 
