CYPERACEAE 107 



4. Rachilla of spikelet deciduous; spikelets crowded in sessile, glo- 

 bose or ovoid heads ; 1. KylUnga 



4. Rachilla persistent long after the glumes have fallen. 



5. Nut laterally compressed 2. Pyereus 



5. Nut dorsally compressed 3. Juncellus 



3. Style S-fid. 



4. Rachilla of spikelet persistent 4. Cypems 



4. Rachilla deciduous. 



5, Rachilla breaking at the lower node only. 5. Mariacus 



5. Rachilla breaking up into several 1-seeded joints.. 6. Torulinium 

 2. Flowefing glumes many, spirally arranged. 

 8. Style-base constricted or jointed above the nut; leaves all basal or 

 wanting, except the leaf-like floral bracts. 



4. Hypogynous bristles present; leaves none 7. Eleocharis 



4: Hypogynous bristles none; leaves usually present.. 8. Fimbristylis 

 S. Style-base passing gradually into the nut. 



4. Hypogynous bristles to 6, linear; leaves glabrous 9. Scirpus 



4. Hypogynous bristles 3 or 6, the inner ones broadly obovate; leaves 



hairy 10. Fuirena 



4. Hypogynous scales 2, enclosing the nut; glumes with spreading 



tips; inflorescence of 9. single spikelet 11. lApocarpha 



2. FloVering glumes 1 or 2, with several lower empty ones and several 



upper empty or male ones; style 2-fid 12. Rynchospora 



1. Spikelets 1-sexual or with 1 basal female flower and 1 or more male 

 or empty glumes; nut bony, globose, usually white and shining. 

 2. Nut smooth, verrucose, tessellated, or tuberculate; glumes entire, 



l-nerved 13.' Seleria 



2. Nut longitudinally fluted; glumes 3-fld, with 3 to 5 nerves. 



14. Diplacrum 



1. KYLLINGA Rottboell 



Erect, tufted or- scattered, the stems simple, leafy below only, terminated 

 by 1 to 3 capitate sessile spikes, subtended by about 3, leaf-like, spreading 

 bracts. Spikes ovoid to cylindric, dense, Spikelets numerous, compressed;, 

 glumes 4 or 5, distichous,, the rachilla breaking above the two lower empty 

 glumes; third glume bearing a' perfect flower; fourth male or empty, the 

 fifth rudimentary or none. Nut laterally compressed; style linear, base 

 continuous with the nut, the branches 2, linear. (In honor of P. Kylling, a 

 Danish botanist.) 



Species 30 or more in most warm and hot countries, 5 or 6, in the 

 Philippines. 



1. Heads green; nut-bearing glume not winged along the upper one-half 

 of the keel.... 1. K, brevifolia 



1. Heads white; nut-bearing glume winged along the upper one-half of 

 the keel 2. K. monocephala 



1. K. brevifolia Rottb. 



Stems slender, glabrous, 10 to 50 cm high, usually scattered, from slender 

 creeping root-stocks. Leaves narrow, 3 to 10 cm long, less than 3 mm 

 wide, the bracts similar, spreading. Spikes mostly solitary, ovoid, green, 

 8 mm long or less. Spikelets very- numerous,' lanceolate, acuminate, about 

 3 mm long, keel of the flowering glume not winged. Nut about 1 mm 

 long, compressed. 



