476 TRANS. OF THE ACAD. OF SCIENCE. 
and the form of the smaller seeds. These seeds are 0.25-0.33 
line long, 2} diameters being equal to the length; pdr 
«about e ual to the diameter, so that the whole seed has a 
length of 0.40—-0.60 line; 7-9 ribs yisible, connected by deli. 
éate vc aap Me 
Var. ais readily known by its som Sa eee ee over a 
found them obtuse. American ee have eso taken 
this form for J. acuminatus, Mich ut Michaux’s plant 
is very different and, moreover, comes from South Carolina, 
while the present variety is, I believe, not found south of 
Pennsylvania. Prof. Porter gets in the mountains of that 
State a low form with more patulous lighter colored —_— 
and more obtuse sepals, Hb. n. 78, which seems to form 
tr a to the next variet 
ak it at once dom that and from var. a; our botanists 
: : awed 
a 
ated peadily etnpuiel: it. Stem 14-2} feet high ; panicle 1-9 
= long and proportionately wide. Mr. C. E. Smith gets 
. form at Tin nnicum, near Philadelphia, which antes this 
with v pai y, having the seeds of this, but the greater number of 
the other (10-12), the larger heads, and the pointed sepals, of 
e ot ome 
length 25-028 in 2-23 diameters ; seed with savet the 
0.33-0.50 or very capienly 0.60 line long 5 ; appendages less than 
