ENGELMANN—NORTH AM. SPECIES OF JUNCUS. 497 
Bigelow ; 35 South Carolina, Ravenel ; var. biflorus is a 
stouter plant with broader leaves, rough on the edges and a 
larger panicle; Hb. n. 88 Delaware, Commons ; a 8. Caro- 
lina, Ravenel. Intermediate forms do not o be rare 
and are found in Hb. n. 86 and 3 Gb avatteide ‘ck from 
the relative length of the inner and outer sepals, or from the 
differences in the nae i ‘ad the capsule, seem to be entirely 
inconstant. No spec ars more abundant seed than this, 
but in the collections it is auely found fully mature. 
ag. . pelocarpus ; as far west as the banks of the 
St. Peters - river, in Minnesota, C. C. Parry.—It seems that 
.n. 46; 
crassicaudex, oe Chapman, Hb. n. 
more in height and bears a — large deouipound panicle, 
5-9 and even it inches lon 
specimen of Michaux’s aR fluitans, from his own her- 
barium in Paris, bears me fully out in my supposition that it 
is a depauperate water or mud form of this species; its short, 
ae. stems, about 4 inches long, bear single terminal 2 
flowered he eo the flower I could examine was not fully 
opie yet, and leaves me in doubt whether it is 3- or 6-an- 
drous. The description of La Harpe is not quite correct in so 
far as he attributes to the head 2 external bracts; while they 
J. articulatus, as far west as the shores of Lake 
Erie, G. W. Clinton ; ; in Herb. norm. 48 from Western New 
York, Sartwell, and 49 from ee Facet on ir 
form with obtuse 5-flowered green heads 
often ae level-topped panicle, pres nieces sepals 
8 
mu 
var. sehen , has been found by Messrs. Diffenbaugh and 
Burke on Ce river banks near Philadelphia; Hb. n. 50. > 
INDEX. 
TT, £ 4 * RP 4 +h £ 4} in Ttalics 
Ce ee] 
J. praitectnm Chapm, +++se- sees 
affinis, Aad ie: e seaeee Ea 458 
alpinus, Vill. -+++++ sseeee ++ 
456 , J. arcticus, Willd. ------ 445, 491 
2 areticus, Hoo 
arcticus, var. Gray ++++-- 446, 447 
45 
asper, Eng. i aie pee ae 478 
