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1901] Greene, — A new northern Eupatorium 83 
A NEW NORTHERN EUPATORIUM. 
Epw. L. GREENE. 
E. boreale. Stout, erect, 2 feet high or more, glabrous except as 
to the inflorescence: leaves ample, very thin, dark-green, feather- 
veined, the veins not light-colored, 3 or 4 inches long, often 3 inches 
broad toward the base, broadly subcordate-ovate, abruptly acuminate, 
coarsely and evenly serrate, the serratures 20 to 25 on each side, 
some of the larger with a secondary tooth; petioles ł to 14 inches 
long, somewhat ascending: cymes terminal, but with one pair from 
the axils of the uppermost leaves: peduncles and pedicels rather 
densely pubescent, but involucres glabrous, their bracts thin, only 
obscurely striate: tips of the corolla-teeth somewhat hairy: achenes 
dark-brown, sharply thin-angled, the angles of those of the outer 
series remarkably setose-hispidulous, the surface glabrous. 
This is a proposed segregate from the Æ. ageratoides of recent 
authors, and seems to form, in New England and northward, the 
bulk of what passes for that species. The plant of Maryland and 
Virginia which I take for the true Æ. ageratoides is very different, 
exhibiting a much firmer leaf texture, the leaves distinctly cordate 
and with a somewhat falcate acumination, the whole of a decided 
yellow-green color, the veins almost white. And this plant is not only 
pubescent throughout, even to the involucre, it is leafy mostly about 
the middle of the stem, and the cymes are rather amply panicled 
above the leaves. It is such a plant as this, with panicled inflores- 
cence and distinctly cordate leaves that the Cornutian figure 
calls for; and that old author, in his text, distinctly mentions the 
light-green hue of the foliage. The achenes in this are perfectly 
glabrous, as in all other Eupatoriums of this group except Æ. doreade. 
Good herbarium specimens of this New England plant have been 
distributed by Dr. Robinson from Jaffrey, N. H.; others are in 
various herbaria from the White Mountain region. It is in the 
Canadian Survey Herbarium from Bass River, Kent Co., New 
Brunswick, collected by Fowler, while the southernmost station from 
which I have seen a specimen is Ipswich, Mass., the specimens dis- 
tributed long ago by Oakes. 
Mr. Fernald’s No. 57, from along the St. Johns River, Maine, is 
ERE RES 
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