ANTENARRIA IN THE MIDDLE WEST 83 
et sub-umbellatis coronato. Folia biuncialia, lamina late ellip- 
tica petiolo aequilonga, superne primum levissime villoso-tomen- 
tosa, dein glabra. Involucrum late-campanulatum; squamae 
angustae, subequilongae, apice angustissime et vix conspicue 
scariosae. Planta sterilis fertili dimidio minor, ejus capitula 
3-5 subsessilia; pappi setis apice manifestim dilatatis sub: 
serratis. 
This fine species was discovered by the writer, in company 
with Dr. Nieuwland, in the vicinity of Benton Harbor, Michigan, 
27 May, 1909, the special habitat being the crown of an open 
hill jutting forth from a piece of woodland, the exposure being 
northward. The fertile and sterile plants were growing together; 
but from the fertile alone the species is easily distinguishable 
from all others of this broad-leaved group. Its heads are slenderly 
pedicellate, and form usually a loose subumbellate corymb. ‘The 
scales of its involucre are very narrow and not manifestly im- 
bricated, being of nearly equal length, in this differing from, I 
think, every other antennaria known, and the scarious tips of the 
scales, being narrow and little elongated are nearly as incon- 
spicuous as those of A. mesochora. ‘The plant will be found in 
other localities of southern Michigan and northern Indiana when 
once the exploration of the region for antennaria shall be carried 
forward beyond what are hitherto its first beginnings. ; 
[ipAc) MESOCHORSA, Greene, Pitt. -v., 11r.(@8 Aug. r903).. A 
full statement of the characteristics of this species may be found 
at the place cited, and need not here be repeated. I do not yet 
see reason for altering it in any particular. It pictures the plant 
as I found it in the middle of May, in Southern Michigan, nine 
years ago, and as others may find it still, no doubt. I first saw 
the plant while passing patches of it on a railway train near the 
station of Marengo. With what was my thorough familiarity 
with the large-leaved species of the East, I could see that this 
was none of them. For one of the tall species it was remarkable 
that it should grow in small but rather compact tufts or clumps. 
The male plants were common, so that I saw many of them. 
This is not true of any large Eastern species. Nor were the males 
at all like those of any known Eastern species. Finally, this was 
a prairie plant. This is an environmental, an ecological con- 
consideration, and a forceful one in all reason, though the un- 
travelled neither heed nor even realize its meaning. 
