NEW OR NOTEWORTHY SPECIES. 111 
ANTENNARIA MESOCHORA. Pistillate plant a foot high, its 
fruiting corymb large, loose: stolons short, their mature 
leaves 24 to 3} inches long including the long merely 
herbaceous-margined petiole and rather shorter limb, this 
obovate, little longer than broad, obviously mucronate, 
lightly floceulent above the first season, the second glabrate, 
beneath densely but scarcely permanently silvery-tomentose: 
involucre singularly green and free from wool, only ob- 
scurely arachnoid, the white tips small and narrow, or 
commonly almost obsolete: achenes long and slender, 
globular-papillose. Stems of staminate plant comparatively 
low and slender, seldom a half-foot high, the corymb often 
proliferous (compound); tips of involucral bracts conspicuous, 
obovate, variously somewhat crenate or erose: tips of pap- 
pus-bristles well flattened, crenate rather than dentate or 
serrate. 
This is the common large-leaved Antennaria of the lower 
Lake Region, north of the Prairie Region, or on its bor- 
ders. As it has been coming in to me for several years past, 
from collectors, though always in too young a state, and in the 
pistillate condition only, I have referred it to A. occidentalis. 
But in May, 1902, being in southern Michigan at just the 
right time, and finding without difficulty staminate plants, 
I was able to see that this is not referable to any published 
species. The male plant is most unlike that of A. occidentalis 
in being more slender, and in having a much more ample, 
often proliferous inflorescence ; and the male pappus-bristles 
in the species last named are both narrow and serrulate, not 
broad and erenate. A. occidentalis belongs exclusively to a 
different and a southerly region. In central Illinois, whence 
I have my type specimens, it has probably its northern 
limit. 
The common eastern species, of which A. mesochora is the 
