1918] Fernald,— Epilobiums Sect. Lysimachion 29 
SOME AMERICAN EPILOBIUMS OF THE SECTION 
LYSIMACHION. 
M. L. FERNALD. 
I. AN INSULAR VARIETY OF EPILOBIUM DENSUM. 
EPILOBIUM DENSUM Raf., var. nesophilum, n. var., caulibus sub- 
simplicibus vel superne ramosis; foliis primariis lanceolatis 3-6 mm. 
latis; calycibus 4.5-7 mm. longis, lobis obtusis vel obsolete mucrona- 
tis; petalis 7.5-10 mm. longis. 
Stems subsimple or branching above: leaves lanceolate; the prim- 
ary 3-6 mm. broad: calyx 4.5-7 mm. long; the lobes obtusish or 
obscurely mucronate: petals 7.5-10 mm. long.— Newfoundland and 
the Magdalen Islands. NEWFOUNDLAND: Bally Haley Bog, St. John’s, 
August 6, 1894, Robinson & Schrenk; boggy open woods, Whitbourne, 
August 8, 1911, Fernald & Wiegand, no. 5,913; boggy thickets, Bishop 
Falls, July 28 and 29, 1911, Fernald & Wiegand, no. 5,910. Maapa- 
LEN ISLANDS: boggy margin of a brackish pond southwest of Étang 
du Nord Village, Grindstone Island, August 15, 1912, Fernald, Long 
& St. John, no. 7,809; larch swamp, Grindstone, July 23, 1912, 
Fernald, Bartram, Long & St. John, no. 7,813; wet woods and thickets 
at the border of a larch swamp, Grindstone, August 13, 1912, Fernald, 
Long & St. John, no. 7,816 (TYPE in herb. Gray); dune hollow, Brion 
Island, August 9, 1914, St. John, no. 1,935. 
This insular extreme of Epilobium densum differs markedly from the 
typical form of the species, which occurs from the west side of the Gulf 
of St. Lawrence westward and southward, in its very large flowers and 
in the unusually broad leaves, as well as in the less branched habit. 
In true E. densum of the continent and of Prince Edward Island the 
leaves are commonly narrower, the plant ordinarily more bushy- 
branched and the calyx 3-4.3 mm. long, the petals 4.2-6.5 mm. long. 
In the subsimple habit and broad leaves, as well as in the larger flowers, 
E. densum, var. nesophilum strongly simulates some forms of E. 
palustre, but it has the erect buds and the seeds as well as the closely 
canescent upper surfaces of the leaves of the more southern species. 
The calyx-lobes are, in their barely mucronate tips, intermediate 
between those of the two species, the calyx-lobes of E. densum being 
usually definitely mucronate, those of E. palustre merely blunt. In 
view of the very extensive collections made upon the Magdalen Islands 
and Newfoundland and the fact that no typical E. densum has been 
TERS 
