ENGELMANN—NORTH AM. SPECIES OF JUNCUS. 475 
central States of the Mississippi Valley, to br it seems 
t stranger. owers in July and August, when 
J. acuminatus, ‘with which it might be hero ny has al-. 
ready shed its seeds.—Var. a is decidedly the most north- 
ern form of this species, which extends from the north- 
eastern States to Canada and the Lake Superior region, 
“7 : 
western New York, Gray, Sartwell, Vasey, Clinton, Central 
Ohio, Sullivant, Central Illinois, Hall, Brendel, Michigan, Bige- 
low, Hb. n. d Wisconsin, Lapha m.—Var. 7 is a form of 
the Atlantic States, found from Connecticut, Eaton to New 
pow and Pennsylvania, Durand, Smith, Hb. n. 81, Leidy, 
er, Hb. n. 80, Delaware, Commons, Hb. n n. 30." istrict of 
Colun bin Bebb, South Carolina, — and et =— 
i gp by him under the name of J. acuminatu us).—Var. 
é6 is the most common of all mas es ms, jiateisdliaie over he 
whole region, with the exception, perhaps, of its north-east- 
ern extremity. I have not seen any specimens from Canada, 
or from the States north ae Massachusetts. The Herb. norm. 
contains different forms of this variety from Michigan 
rested vania 33, Maryland 88, and South ya ws 85, 86 
The different forms of this intricate species are as wide 
distinct. Its synonymy is in some confusion. It qlee im- 
possible that s fer of so wide-spread and so easily accessi- 
ble a species should not have been obtained by collectors long 
since, and we do indeed find such among Michaux’s (La Harpe, 
.¢.) and among Schweinitz’s plants, and no doubt in many 
with other species, such as the similar looking J. acuminatus, 
especially its var. /egitimus, under the name of J. polycephal 
or J. ver oe yoy e subverticillatus ).—This and er follow- 
hea exceed the outer ones. From its two allies it is dis- 
tinguished principally by the shape and os ofi its cap- 
sule, = the smaller and different tly shaped see 
aand # are distinguished sage the nent by their 
cmitin usually 3-4 flow ered, heads, smaller flowers, w 
13-1} and only in Lake Superior cengereoscl of a 13 rai long, 
1868.) 31 
