ENGELMANN—NORTH AM. SPECIES OF JUNCUS. 487 
Michigan, and after them inc Messrs. Porter and Smith of 
Pennsylvania and Chapman of Florida. My own and the 
poh botanical fraternity’s ackinswieipreante are due to all 
of them. 
The 99 numbers comprise 88 different species —among 
them 10 described ny Sal the first time and 12 very rare or 
critical ones—and 2 ortant varieties; the bala ance con- 
one; Gt on the whole = will be found satisfactory, and 
many of them very perfect and better more complete 
than they can be found in most etbantau: at my friends or 
the friends of botany in this country will undertake the labor 
of collecting and sending me specimens of the Junci not at 
all or only incompletely represented in the Herbarium Nor- 
tion. I would, in this case, urge the importance of getting 
not only tho ecies that are wanting in the Her orm., 
ect the different forms of such th oe ag species as J. 
pase or J. Canadensis and similar o 
ADDITIONS AND CORRECTIONS, 
Pag. 425. Among the vegetative organs, the rootstock (not 
root-stalk, as misprinted) has been barely mentioned, while it 
ost important organ and exhibits many differences in the 
onius, triformis, Kelloggii, and, I believe, repens e 
others brin h buds from the a f the lowest scaly 
leaves (Wiederblaetter) at or soon after the pe er- 
h 
in most species the rhizoma, otten bearing the vestiges of the 
decayed flowering stems, continues to exist much longer r, at- 
