504 CYPERACEiE. (SEDGE FAMILY.) 



sule 2-3-cellc(l. — Habit of the two preceding. Bracts and sepals blackish, 

 fringed with club-shaped hairs. 



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

 sraootiiish; scapes slender, haiiT, 4-furrowed (l°high); heads globose; bracts 

 and sepals spatulate, obtuse, fringed with wliite liairs; divisions of the style 3, 

 eaeli 2-cleft. (Eriocaulon villosuin, Miclix.) — Low grassy pine barrens, Florida 

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



2. L. glabrum, Kornickc. Leaves linear, smooth (1' long); scapes numer- 

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

 brown ; bracts and sepals sj)atulate-obovate, obtuse, slightly fringed with short 

 brownish hairs ; 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 Elcdcharis obtusa. 



Order 159. CYPERACEiE. (Sedge Family.) 



Slender herbs, with simple solid mastly 3-angled stems {culms), and 

 grass-like leaves, with closed sheath.s. Flowers spiked, eacli in the axil 

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

 hypogynous scales or bristles, or none. Ovary In-elled, with a single 

 erect anatropous ovule, fonning 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.^. — Flowers perfect: epikelets 1 - many-flowered : scales one to 

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

 « Perianth none: nut beakless. 



1. CYPERUS. Spikelets few -many-flowered: inflorescence terminal. 



2. KVLLINGIA. Spikelets l-flowered : inflorescence terminal, capitate. 



» * Perianth bristly : nut beaked. 



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



Tribe II. LIPOCARPHEiE. — Flowers perfect: spikes many-flowcn'd : scales 2-4 

 to each flower ; the exterior ones imbricated in many row^i ; perianth none. 



4. IIEMICAUPIIA. Inner scale 1 : involucre mostly 1-leavcd, erect. 



6. LIPOCAKPIIA. Inner scales 2 : leaves of the involucre 2 or more, spreading. 



TnmE III. SriRPE.^. — Flowers perfect : spikes commonly many -flowered : scales one 

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

 perianth bristly, liairy, or wanting. 



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



6. FUIRENA. Nut pointed : scales of the clustered axillary and terminal spikes awned. 



• • Perianth bristly, occasionally wanting. 



7. ELEOCIIARIS. Nut tubercled : cuhiis leailcss, sheathed at tliu b.i8C, bearing one temiinal 



spike. 



