40 Morten P. Porsizp. 
the manured soil and holds its own for several years until finally it is 
overpowered by Alopecurus alpinus. In rich and manured soil adequately 
irrigated during the period of vegetation it attains, about Disko Bay, a 
height sufficient for hay-making. 
Very common in the whole area. 
Widely distributed in Greenland, without southern and probably 
also without northern limit. 
Flowering and fruiting abundantly. 
Most regularly covered by snow during winter. 
I 45. Poa arctica R. Br. (P. cenisia Autt. non ALL.). 
In dry heath, in stony, gravelly or rocky soil a little rarer than 
the preceding species in the lowland, becoming commoner upwards. 
Common throughout the whole area, in the fjords of the southern 
parts; scarce, however, in the richly plant-covered lowland. 
Widely distributed arctie plant, without northern limit in Green- 
land; also found down to Cape Farewell, but according to ROSENVINGE 
scarce and principally alpine in South Greenland. Hence we consider 
the species as a northern type. 
Ascending the hills to the snow-line. | 
Abundantly flowering and fruiting. Seldom oceurring in pure 
associations. 
Probably often snowbare during winter. 
| 46. Роа alpina L. 
In soil rich т humus, оп herb-slopes amongst thickets and in 
luxuriant heath, sometimes amongst mosses at springs, or in rock- 
crevices, more seldom in sandy or clayey soil poor in humus along 
watercourses. 
Disko: Common in the southern part and in the two southernmost fjords, 
rarer in the southern parts along the Waygat, and here mostly confined to springs 
and other luxuriant spots. Nordfjord, oceurring in the big valleys. West coast; 
locally, but rare. North coast: not observed. 
Hare Island: south coast, rare (P.). 
Mainland: rare on the coasts of Nügssuaq peninsula, becoming more abun- 
dant south of Torsukätak, southwards common except on the smallest and out- 
most lying islets of the archipelago. 
As to distribution on Disko resembling the southern types, 
to which it is to be reckoned. Widely distributed in Southern Green- 
land without southern limit. The exact northern limit of the species 
is unknown, its occurring to 74° is certain, from places north of Cape 
York it has often been stated in literature, but Simmons has proved 
most of the statements to be erroneous or at least improbable. 
