RUSH FAMILY 119 
A. Clusters of flowers apparently growing from the side of the scape. 
1. J. effusus, L. (Fig. 1, pl. 10.) Common Rusu. Scape straight, 
4 to 4 ft. high, growing in dense tufts. The cluster of green flowers 
grows apparently on one side of the scape, which extends above it from 
2 to several inches. The cluster is twice compound, the flowers sepa- 
rate, not in heads, the cluster subtended by several bracts. A long leaf- 
like bract sheaths the scape at base. The segments of the perianth are 
green, lance-shaped, acute. Common in swamps and other wet places. 
2. J. filiformis, L. (Fig. 8, pl. 10.) Tureap Rusu. Scape straight, 
‘weak, very slender. The cluster of flowers is nearly simple, not twice 
compound as in No. 1. The petals are shorter than the sepals, while in 
No. 1 they are longer. 
3. J. setaceus, Rostk. AWt-LEAvED Rusu. Scape 13 to 3 ft. high, 
plant in dense tufts. The bract. or leaf sheathing the scape at base is 
extended into a cylindric stem like the scape. Cluster of flowers com- 
pound, with conspicuous bracts at the base of the secondary groups. 
Sepals longer than petals and both narrow lance-shaped and acute at 
apex. The apparent prolongation of the stem is really the involucral 
leaf to the flower cluster. Marshes along the sea coast, Delaware, south- 
ward. 
4. J. Smithii, Coville. PENNSYLVANIA RusH. (J. gymnocarpus, 
Englm.) Stem 1 to 2% ft. high; basal leaves reduced to clasping sheaths. 
The loose cluster of flowers about an inch high, diffuse, the leaf below 
the cluster 4 to 10 in. long. Parts of the perianth reaching only to the 
middle of the capsule. The capsule broadly oval with a sharp point or 
spine at the apex, brown and glistening. Swamps, mountains of Schuyl- 
kill and Lebanon Counties, Penna. g 
5. J. balticus, Willd. Bartic Rusu. Scape 1 to 3 ft. high, the plants 
arising in dense rows from a stout rootstock. Flower cluster brown, 
1 to 14 in. high, the parts of the perianth lance-shaped, acute, nearly 
equal. Sandy shores, most of our region. 
6. J. trifidus, L. (Fig. 7, pl. 10.) HicH~anp RusH. A small rush, 
densely tufted; scape 4 to 12 in. high. Basal leaves sheathing the scape, 
scarcely diverging as leaf blades. At from 1 to 3 in. below the small head 
of flowers a single-stem leaf arises, which is from 3 to 5 in. long; very 
narrow. Cluster of 1 to 3 flowers in the axil of a bract resembling the 
leaf-stem, but rarely more than 2 in. long. Flowers dark brown. Stamens 
6. On the high mountains of the Adirondack and White Mountain ranges. 
Cd 
7. J. Roemerianus, Scheele. Ra@Mmer’s Rusu. A large rush, growing 
in salt marshes; scape stout, rigid, 1} to 4 ft. high, arising singly from 
a horizontal rootstock. Basal leaves short, sheathing, or nearly as long 
as the stem. Cluster of flowers diffuse, 2 to 6 in. high, with flowers in 
heads of 5 to 8, dark brown, Stamens and pistils not always all on same 
plant. Seeds without tails. Sepals sharp-pointed, the petals shorter. 
Salt marshes, New Jersey and southward. 
8. J. maritimus, Lam. (Fig. 5, pl. 10.) Sea Rusw. Resembles No. 
6. Flower green, not dark brown as it is in that species and seeds are 
tailed, Salt marshes at Coney Island, N. Y. 
