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SYNOPSIS OF THE GENERA. 
heads, barren flowers with a single pertanth, of three 
pieces, six stamens, the anthers wedge-shaped, fertile 
Jlowers with a single perianth, of three pieces, surrounding 
a solitary superior ovary. Fruit sessile, single seeded. 
** Flowers in cylindrical spikes. 
6 Ty'pHa, [Page 1150.] Flowers in dense cylindrical naked 
spikes or catkins, barren flowers without perianth. Séa- 
mens three, united at the base into a single filament, 
fertile flowers without perianth, fruit single seeded, 
pedicellated, the pedical surrounded at the base with long 
pappus-like hairs. 
7. Ca'rex, [Page 1151.] Flowers in imbricated cylindrical 
spikes, barren flowers mostly collected in terminal spike- 
lets, perianth wanting. Stamens on slender filamants, 
mostly three, fertile flowers in imbricated spikelets, 
perianth (formed of united scaies) urceolate, and forming 
a persistent covering to the triquetrous nut. Styles two 
or three. 
8. Kopre'sta, [Page 1189.] Spikelets two flowered, upper ones 
barren, the lower fertile. Scales imbricated in many 
rows, single flowered, barren jfiower of three stamens, 
without perianth, fertile flowers with one style and three 
stigmas, the ovary embraced with two scales. Fruit a 
somewhat three cornered nut, mucronate, and enclosed in 
a membranous pouch. 
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OrperR IV. Teranpria.—4 Stamens. 
9. Litrorr’tia, [Page 1189.] Barren flowers pedicellated. 
Calyx and corolla four-partite. Stamens very long. 
Fertile jlower sessile. Calyx three-partite. Corolla 
urceolate, contracted at the mouth, and obsoletely toothed. 
Siyle long. Capsule single seeded—Low grass-like 
plants. 
10. Bux'us, [Page 1190.] Flowers clustered, axillary. Barren 
flowers with a three-partite calyx, and a corolla of two 
pieces. Rudiments a germen two lobed scales. Stamens 
four, inserted into the rudiments of the germen. Fertile 
flower with a four partite calyx, and a corolla of three 
pieces. Styles three. Stigmas three, obtuse. Capsules 
