556 CYPERACKyF,. (sedge FAMILY.) 



3. DULICHIUM, Kichard. Duliciuum. (PI. 1.) 



Sj)ikos iiiiiiiy- (t) - 1(1-) (l()\\ci((l, liiu'ar, flattened, sessile in 2 ranks on axillary 

 solitary jieduueles emeriti ti<;- from tiie .sheaths of tlic leaves: scales 2-raiiked, 

 lanceolate, decurrent, forming Hat wing-like margins on the joint below. PerU 

 :.nth of G-9 downwardly barbed bristles. Stamens 3. Style 2-cleft above. — ■ 

 Achenium flattened, linear-oblong, beaked with the long persistent style. — A 

 perennial herb, with a terete simple culm (l°-2° high), jointed and leafy to the 

 summit; the leaves short and flat, linear, 3-ranked. (The name of a Greek 

 island ; its singular application to an American plant unexplained.) 



1. D. spathkeeum, Pers. — liordcrs of ponds : common. July- Sept. 



4. FUIRENA, Kottbull. Umbkella-Gk.vss. (PI. 2.) 



Sj)ikes many-flowered, terete, clustered or solitary, axillary and terminal. 

 Scales imbricated in many ranks, awned below the apex, all floriferous. Peri- 

 anth of 3 ovate or heart-shaped petaloid scales, mostly on claws, and usually 

 with as many alternating small bristles. Stamens 3. Style 3-cleft. Achenium 

 triangular, ])ointcd with the persistent base of the style. Culms from a peren- 

 nial root, obtusely triangular. (Named for G. Fuin-n, a Danish botanist.) 



1. F. squarrdsa, Michx. Stem (l°-2°high) leafy; leaves and sheaths 

 hairy; spikes ovoid-oblong (ti ' long), clustered in heads, bristly with the spread- 

 ing awns of the scales; perianth-scales ovate and awn-pointed, the interposed 

 bristles minute. — Var. pumila, Torr., is a dwarf form, l'-6' high, with 

 2-6 spikes; perianth-scales ovate-lanceolate and oblanceolate. — Sandy wet 

 places, Massachusetts to Virginia, and southward ; also Michigan : northward 

 mostly the small variety. Aug. 



5. LI PO CARP HA, R. Br. Lipocarpiia. (PI. 2.) 



Spikes terete, mnny-flow(>ii'd, in a terminal close cluster, which is involucrate 

 by leafy bracts. Scales spatulatc, regularly imbricated all round in many ranks, 

 awnless, deciduous, a few of the lowest empty. Inner scales (bractlets) 2 to 

 each flower, thin, one between the scale of the spike and the flower, one between 

 the latter and the axis of the spike. Bristles or other perianth none. Stamens 

 I or 2. Style 2 -3-cleft. Achenium flattish or triangular, naked at the tip. — 

 Culms leafy at the base. (Name formed of 'Klnoi, fut, and Kcipfpos, chaff, from 

 the thickne.ss of the inner scales of some species.) 



1. L. maculkta, Torr. Annual; culm (4' -8' high) much longer than 

 the linear concave leaves; spikes (1"- 2'' long) green and dark-.spotted ; inner 

 scales ■delicate ; stamen one ; achenium oblong with a contracted base. — Petty's 

 Island, Philadelphia, Prof. Leidy, ^c. Probably adventive from S. States. 



6. HEMICARPHA, Nees. IIemicaupiia. (PI. 2.) 



Spike, flowers, &c. just as in Scirpus, except that there is a minute trans, 

 lucent scale (readily overlooked) between the flower and the axis of the spike. 

 Stamen only one. Style 2-clcft. Bristles or other iK'rinnth none. (Name from 

 rifj.1, half, and K(ip<pos. sham or c/iaJJ', in allusion to the single inner scalelct.) 



