50-4 CYPEUACK^. (SKl)GE FAMILY.) 



sale 2-3-(t11c(1. — Hal)it of the two preceding. IJracts and sepals blackiih. 

 fi'iiiged with cliili-.'-lmpid liairs. 



1. L. Michauxii, Kunth. Leaves linear (l'-2' long), liairy, becoming 

 sniootliisli ; Kcupes slender, luiiry, 4-furrowed (l^liigh); heads globose; bracts 

 ond sepals spatulute, obtuse, fringed with white hairs; divisions of the style 3, 

 each 2-cleft. (Kriocniilon viliosum, Mlchx.) — Low grassy pine l)arrens, Florida 

 to North Carolina. May and June, growing in tufts. — Heads 2" wide. 



2. Ij. glabrum, Kornickc. I^eaves linear, smooth (1' long) ; scapes numer- 

 ous, smootli, 5-furrowed (3'- 5' high); heads globose, becoming oblong, dark 

 brown ; bracts and sepals spatulate-obovate, obtuse, slightly fringed with short 

 brownish haii-s; divisions of the style 3, entire. — Sandy springy places, St. An- 

 drews Bay, West Florida. Oct. — Scapes 30 or more in a cluster. Heads 3" 

 long, not unlike those of Elcocharis obtusa. 



Order 159. CYPERACE^. (Sedge Family.) 



Slender herbs, -with simple solid mostly 3-angled stems (culms), and 

 grass-like leaves, with closed sheaths. Flowers spiked, each in the axil 

 of a single (rarely 2-4) scale-like bract (scale). Perianth composed of 

 hypogvnous scales or bristles, or none. Ovary 1 -celled, with a single 

 erect anatropous ovule, forming in fruit a lenticular or 3-angled achenium 

 (nut), which is often crowned with the persistent jointed base of the style 

 (tubercle). Stamens 1-12: anthers erect. Style 2-3-cleft. or parted. 

 Embryo minute at the base of the albumen. 



Synopsis. 



Tribe I. CYPERE.E.— Flowers perfect: ppikelets 1 - many-flowered : scales one to 

 each flower, imbricated in 2 rows : perianth bristly, or none. 

 • Perianth none : nut beakles.s. 



1. CYPERL'P. Spikelcts few -many-flowered: inflorescence terminal. 



2. KYLLINGIA. Spikelets 1-flowered : inflorescence terminal, capitate. 



• * Perianth bristly : nut beaked. 



3. DCLICHIUM. Spikes lateral and terminal : spikelets many -flowered. 



Tribe 11. LIPOCARPHE.K. — Flowers perfect: spikes many-flowered: scales 2-4 

 to each flower ; the exterior ones imbricated in many rows : perianth none. 



4. HEMICARPIIjV. Inner scale 1 : involucre mostly 1-leaved, erect. 



5. LIPOCARPIIA. Inner scales 2 : leaves of the involucre 2 or more, spreading. 



Tribe III. SCIRPE.^. — Flowers perfect : spikes commonly many-flowered : scales one 

 to each flower, imbricated in several (rarely 2) rows, all fruitful, or the lowest empty : 

 perianth bristly, hairy, or wanting. 



• Perianth of 3 bristles, alternating with 8 stalked scales. 



6. FUIRENA. Kut pointed ; scales of the clustered axillary and terminal spikes awned. 



• » Perianth bristly, occasionally wanting. 



7. ELEOCIIARIS. Nut tuberclcd : culms leafless, sheathed at the base, bearing one terminal 



spike. 



