32 Rhodora — [FEBRUARY 
doubtfully referred here occur in the Gray Herbarium from Labrador.” 
Subsequent authors have been inclined to treat E. glandulosum as an 
obscure plant and not to recognize it as a broadly distributed northern 
species. In the meantime the vast accumulations of Epilobium of the 
general affinity with Æ. glandulosum have found their way chiefly into 
the covers of E. adenocaulon Haussk.' 
About the Gulf of St. Lawrence and on the shores of the Straits of 
Belle Isle and the coast of eastern Labrador there is a large-flowered 
Epilobium with. petals 7-9 mm. long, the pubescence as in E. adeno- 
caulon, the leaves of similar outline, but much more crowded, and not 
conspicuously decreasing in size into the inflorescence. The stem 
is comparatively simple, the branches being few and very short. 
This plant, long familiar to the writer from the coast of the Gaspé 
Peninsula of Quebec, the Straits of Belle Isle and Newfoundland, 
exactly matches the Alaskan material of undoubted E. glandulosum, 
as well as the plate of that species published by Léveillé.” In the Gulf 
of St. Lawrence region, however, many plants occur with the lax habit 
and more reduced upper leaves of E. adenocaulon, but with the flowers 
quite as large as in Æ. glandulosum, while other specimens with the 
habit of E. glandulosum have the smaller flowers of E. adenocaulon. 
That the two species there freely intergrade cannot be questioned; 
but it is significant that all the material from the colder habitats, the 
Labrador coast, the outer coast of Gaspé, ete., are fairly consistent and 
perfectly characteristic E. glandulosum. Reference has already been 
made to Prof. Trelease’s statement that in the Northwest forms in 
British Columbia are “too near” E. glandulosum. Herbarium mate- 
rial shows that this is certainly the case and that in the Northwest 
as well as in the Northeast the two are confluent. Examination of the 
seeds of characteristic material of both plants fails to reveal any dis- 
tinctive character, although the seed of E. glandulosum is very slightly 
longer than that of E. adenocaulon. 
On the whole, the writer is forced to the conclusion that these 
plants should be treated as one species, a conclusion already suggested 
by Dr. Britton, who treats E. glandulosum as doubtfully distinct 
from E. adenocaulon.’ As geographic varieties, however, the plants 
are well pronounced and their treatment as such seems to the writer 
1 Haussk. Oesterr. Bot. Zeitschr. xxix. 119 (1879). 
2 Léveillé, Icon. Gen. Epil. t. 164 (1910). 
3 Britton in Britton & Brown, Ill. Fl. ii. 484 (1897). 
