58 THE JLOEA OF THE NOBTHBEN TEEEITOEY. 



6. FIMBRISTYLIS, Vahl. 



Section I. Heliocharoides. — Spikelet solitary, terminal. Glumes im- 

 bricate aU round. 



Nut biconvex, with transverse raised lines or wrinkles. Style-branches 

 2 or rarely 3. 



Spikelet erect, usually whitish. 



One or two lower glumes empty. — 1. F. acicularis. 

 About four lower glumes empty, all broad and obtuse. — 20. F. 

 leucostachya. 

 Spikelet nodding, usually brown. — 27. F. nutans. 

 Nut 3-angled or biconvex, smooth striate granular or tuberculate. Style- 

 branches 3 or sometimes 2. 



Spikelet oblong, lanceolate. Style-branches 3. 



Spikelet about half a hne broad. Leaves few or none. No invo- 



lucral bract. Nut tuberculate. — 30. F. pauciflora. 

 Spikelet about 1|^ lines broad. Leaves fihform. No involucral 



bract. Nut minutely tuberculate. — 8. F. cardiocarpa. 

 Spikelets about 1 line broad. Leaves setaceous. Involucral 

 bract often as long as the spikelet. — 19. F. leucocolea. 

 Spikelet ovate or oblong. Style-branches 2. 



Spikelet 1 to 1 J lines broad. Nut tuberculate. 



Leaves numerous, filiform. Flowers all hermaphrodite. — 



31. F. polytrichoides. 

 Stems leafless. Upper flower female. — 3. F. androgyna. 

 Spikelet 3 lines broad. Nut narrow-oblong, striate and cancel- 

 late. Stems leafless. — 43. F. tetragona- 

 Spikelet ovate, erect. Style-branches 3. Nut tuberculate. Leaves 

 numerous. 



Nut broad, 3-furrowed, on a long stipes. — 44. F. trigastrocarya. 

 Nut 3-ribbed, on a short stipes. — 25. F. monandra. 

 Spikelet globular, erect. Style-branches 3. Leaves numerous. 



Spikelet white, 2 to 3 Unes dianeter. Nut flattened, often sur- 

 rounded by a hyaline wing. — 32. F. pterygosperma. 

 Spikelet brown, 1 to 1|^ lines diameter. — 38. F. sphaerocephala. 

 Spikelet nodding, brown, ovoid or cylindrical, 3 lines diameter. 

 Leaves long and flat. — 46. F. xyridis. 

 (See also 39, F. spiralis, which has sometimes solitary spikelets.) 



Section II. — Abildgaardia. — Spikelets solitary or few, flat with distichous 

 glumes, or narrow and spiral in 2 or rarely 3 rows. Style-branches usually 3. 

 Spikelets solitary, narrow, usually^ spiral. Glumes long, cartilaginous or 

 scarious. 



Glumes scarious, acuminate, with erect points. — 29. F. oxystachya. 

 Glumes rigid, opaque, acute, closely appressed. — 21. F. macrantha. 

 Glumes rigid with long recurved points. — 41. F. squarrulosa. 

 Spikelets often several, very flat, regularly distichous or slightly spiral. — 

 57. F. Brownii. 



Section III. — Dichelostylis. — Spikelets several usually numerous. Glumes 

 imbricate all round. Style-branches 2. Nut biconvex. 

 Tufted annuals, leafy at the base. Stems under 1 ft. 



Nut smooth or very minutely striate or cancellate. 



Style-bulb ciliate at the base, the hairs spreading or re flexed over 



the nut. — 45. F. velata. 

 Style-bulb glabrous. — 2. F. aestivalis. 



