CYPERACE.E. 395 



Ponds and borders of swamps. Aug. Per. Soape 2_ inches to G feet long, ac- 

 cordiogto the depth of the water, pellucii and cellular. Leaves submersed, in a 



firsall tuft at the bottom, 1 to 3 inches by 1 to 2 lines, awl pointed, tapering from 

 a flattened base. Head lead-color, l /^ to ^ in«h broad. Stamens -1. 



Sub-class IV. GLUMACEiE, or GLUMACEOUS EN- 

 DOGENS. 



Plants of the endogenous structure, with the flowers in- 

 rested in an imbricated perianth of glumes instead of a 

 calyx. Ovary with one cell containing a solitary ovulo 

 and becoming a 1-seeded achenium or caryopsis. 



Order 132. CYFERACE2Z— Sedge Family. 



Grass-like or rush-like, herbs, with fibrous roots and solid stems (culms), closed 

 sheaths, and spiked chiefly 2-androus flowers, one in the a±U of each of the glume-like 

 imbricated bracts, destitute nf any perianth, or with hypogynous bristles or scales in 

 its place, and a lceUed ovary, with a single erect anatropous ovule, in fruit forming 

 an achenium. Style 2-clcft, when the fruit is flattened or lenticular, or 3-cltft 

 when it is 8-angular. 



1. DULTCIITUM, Richard. 



Qr. duo, two, leiken, a scale; alluding to the glumes in two rows. 



Sri relets 6 to 10 -flowered, linear, flattened, sessile in 2 

 ranks on axillary solitary peduncles emerging from the 

 sheaths of the leaves. Scales 2-ranked, lanceolate. Pe- 

 rianth of G to 9 downwardly barbed bristles. Stamens 

 3. StiLE 2-cleft above. Achenium flattened, linear- 

 oblong, beaked with the long persistent style. — Perennials, 

 with short flat linear 2-ranked leaves, and round simple jointed 

 culms, lecfy to the summit. 



D. srATiiACEUM, Per3. Spathaceous Dulichium. 



Borders of ponds, common. July — Sept'. Culm 1 to 2 fret high. Leaves fip.t, 

 spreading almost horizontally in thr»>c directions. Sp&celets % inch long, trowni6h, 

 en a flexuous rachis. Scales rusty-yellow. 



2. CYPERUS, Linn. Galingale. 



The ancient Greek nemo. 



Spirelets many to few -flowered, disposed in a sample or 

 compound terminal umbel. Scales 2-ranked, deciduous 

 with age. Stamens 1, 2, or mostly 3. Perianth none. 

 Style 2 to 3-cleft, deciduous. Achenium lenticular or 

 triangular, naked at the apex. — Mostly perennials, with si?npla 



