560 ORDER CXLT. CYPERACK^E. 



9. S. equisetoi'des, (Ell.) Stem erect, terete, glabrous, jointed, 

 sheathed at the base. Spikes cylindrical. Glumes obtuse, tinged with 

 purple. — 11. June — July. Damp soils. 18 — 24 inches. 



Genus VI.— ERIOPH'ORTJM. L. 3—1. 

 (From erion, wool, and phoreo, to bear.) 



Glumes chaffy, imbricate in all directions. Palece none. 

 Seed surrounded by a long, dense wool. 



1. E. Virgin'icum, (L.) Stem erect, glabrous, terete. Leaves linear, 

 keeled, with the margins scabrous. Spikes clustered, in a globose head. 

 Involucre longer than the head, 3-leaved, unequal. Mowers diandrou9. 

 11. Aug. — Sept. In wet places. 3 — 4 feet. 



Genus VII.— FUIRE'NA. Rottbl. 

 (In honor of Fuiren, a Dutch botanist.) 



Glumes arranged in a spike, on all sides, awned. Spikes 

 many-flowered, axillary and terminal. Palece 3, petaloid, awn- 

 ed, cordate, unguiculate. Stamens 3. 



It F. sctrpoi'dea, (Vahl.) Stem erect, slender, terete, smooth, sheath- 

 ed. Flowers in a terminal ovate head. Glumes pubescent, with a short 

 awn. Palece oval or lanceolate, sometimes unawned. — 1[. July — Aug. 

 Damp soils. 12 — 15 inches. 



2. F. squarro'sa, (Mich.) Stem erect, hairy at the summit. Leaves 

 lanceolate, 3-nerved, ciliate. Flowers in ovate heads, clustered. Glumes 

 oval, with long awns, expanding. Paleoe. cordate, or rounded at the 

 base. — U- Aug. — Sept. Bogs. 1 — 2 feet. 



3. F. his'pida, (Ell.) Stem erect and decumbent, smooth below. 

 Leaves narrow, tapering, 4 — 8 inches long, many-nerved, hispid on the 

 lower surface. Scales of the spikes oval, outer onea hispid, the innei 

 ones finely pubescent ; awn long. Stamens 3. Stigmas 3. — Around 

 ponds. Middle Georgia, 



Genus VIII— ISOLE'PIS. R. Br. 3—1. 

 (From isos, equal, and lepis, a scale ; scales regular.) 



Spikes many, rarely few-flowered. Scales imbricate ; all 

 flower-bearing. Stamens 1 — 3 ; achenium triangular. 



1. I. micran'tha, (Rcem.) (Scirpus minimus, Pursh.) Culm seta- 

 ceous, filiform, terete, 1-leaved, smooth. Leaf short, setaceous or cap- 

 illary. Spikes sessile, ovate, acute ; involucre 2deaved ; scales obo- 

 vate, acuminate. Stamen 1. Style divided ; setse none. — Wet sandy 

 fields. Virginia to Georgia. 



2. I. stenophyl'la, (Kunth.) (Scirpus stenophyllus, Ell.) Stem fili- 

 form, obtusely 3-angled, erect and procumbent. Leaves setaceous, with 

 the throat of the sheath hairy. Spikes clustered, sessile; involucre 4- 

 leaved, with the leaves unequal. Flowers monandrous. — 0. July- 

 Sept. Dry soils. 3 — 4 inches. 



