ROWLEE: PLANTS FROM SOUTHERN PATAGONIA 307 
Negro. This corresponds in distance from Central Labrador to 
Washington, or from Sitka to San Francisco. It seldom exceeds 
fifty miles in width and is confined to the easterly base of the 
Andes. Like most other regions lying between two extremes, 
this transitional region supports a vegetation that is unique and 
diversified. 
Dusén made a special study of the vegetation of Fuegia and 
reports that few species (not more than four) represent the vege- 
tation of the forest floor in the transitional region in Fuegia. 
Other travelers speak of the absence or scarcity of vegetation in 
the beech groves of Patagonia. Whether this is due to the intense 
shade of the beeches or to historical reasons or to both can only 
be conjectured. There seems to have been no type of vegetation 
in this southern region corresponding to the rich spring flora of 
the forest floor in the north temperate zone. 
Lake Argentina is the most southerly of several large lakes in 
the easterly foothills of the Patagonia Andes. It is a large lake 
some forty miles long and fifteen miles wide and with long arms 
at the westerly end, one extending north and the other south for 
thirty or forty miles. Both of these arms have large glaciers 
flowing into them. The outlet of the lake is Santa Cruz River 
which flows eastward into the Atlantic Ocean. The western end 
of the lake and particularly the north and south arms are filled - 
with icebergs for the greater part of the year. The northern shore 
tises abruptly into an elevated table land which has been explored 
only to a very limited extent and that principally along the Leona 
river which comes down from Lake Veidma some twenty-five 
miles away and empties into Santa Cruz River near Lake Argen- 
tina. The southern shore of the lake is more hospitable and a 
few sheep ranchers inhabit the region. Between Lake Argentina 
and its southwesterly arm the region is known as the Burmeister 
peninsula. There are two mountains on this peninsula, the 
westerly one Mt. Buenos Aires and the easterly one Mt. Frias. 
It was from this peninsula and the slopes of these mountains that 
the principal part of Mr. F urlong’s collections were made. 
of the Burmeister Peninsula there is a range of mountains, 
Baguales, of considerable elevation which extends easterly into 
the Patagonia high pampas region. These mountains are rough, 
