560 ORDER CXLT. CYPERACE^. 



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

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

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



Genus YI.— ERIOPH'ORUM. L. 8—1. 

 (From erion, -v\-ool, and phoreo, to bear.) 



Glumes chaffy, imbricate in all directions. Palece none. 

 Seed surrounded by a long, dense wool. 



1. E. ViRGix'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 Floicers diandrous. 

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



Genus VII.— FUIRE'NA. Eottbl. 

 (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. 



1. F. scirpoi'dea, ( Val)l.) Stetn erect, slender, terete, smooth, sheath- 

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

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

 Damp soils. 12 — 15 inches. 



2. F. sQUARRo'sA, (Mich.) Ston erect, hairy at the summit. Leaves 

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

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

 base. — li. 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 ones hispid, the innei 

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

 ponds. Middle Georgia. 



Genus VIIL— 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, (Roem.) {Scirpus minimus, Pursh.) Culm seta- 

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

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

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

 fields, Virginia to Georgia. 



2. I. stenophyu'la, (Kunth.) {Scirpus stenopliyltus, 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 raonandrous. — @. July — • 

 Sept. Dry soils. 3 — 4 inches. 



