244 
M. L. FERNALD 
Panicum tennesseense, one of the most abundant grasses of the southern 
and southeastern United States, abounding eastward as far as Maine 
and western New Brunswick, but unknown from that region eastward 
until we come to the extreme eastern edge of Newfoundland. Turning 
now to the aquatics of eastern Newfoundland, these show exactly the 
same peculiar geographical ranges. The ponds and lakes of eastern 
Newfoundland are given over to such species as Potamogeton polygoni- 
folius, the common pondweed of European heath-lands, of broad 
Eurasian distribution, but quite unknown in America except in south- 
eastern Newfoundland and on Sable Island, or Potamogeton Oakesianus, 
the commonest pondweed of Nantucket and Cape Cod and found 
also southward into New Jersey. 
So much, briefly, for the characteristic flora of the peaty open woods 
and slopes, the river-banks and ponds. The more exposed rocks and 
sand hills also show a strong coastal plain affinity. Everyone familiar 
with the open pine woods and sand hills of Atlantic United States 
knows the genus Hudsonia, represented by the two species, H. tomentosa 
and H. ericoides. Both of these species reach Newfoundland, but the 
latter, H. ericoides (fig. 5), is notable because it is found only in the 
extreme eastern portion of the island, where, like many other southern 
plants, it occurs on islands surrounded by nearly perpetual ice or 
ice-floe and fog. Thus, briefly, we have summarized the main floral 
elements of the characteristic acid southeastern region of Newfound- 
land. 
Turning now to the central tundra district, we find, on referring to 
standard literature upon phytogeography, that the interior of New- 
foundland is called a part of the arctic tundra; but this, Hke much of 
recent phytogeographic literature, is a statement prepared far away 
from and with a minimum of knowledge of the region described, for, 
although the region is certainly tundra, the most conspicuous thing 
about the tundra is the fact that it is not arctic. One of the larger 
ponds at the eastern edge of the tundra district bears the name, at 
once attractive to the visiting botanist. Rushy Pond. When our 
party was in this region, one of the first guesses was, inevitably, as to 
the particular rush which gave name to the pond. But after our 
experiences already in the region we all guessed alike, that it must be 
the common coastal plain Juncus militaris. The guess was correct 
and Rushy Pond was found to be bordered, like the ponds of New 
Jersey, Long Island and Cape Cod, by Juncus militaris (fig. 6), while 
