82 l6. GRAMINEAE 



The seeds of several species (especially those of the fundi P. exile Kippist) 

 are sometimes used as food. Paspalum L. 



21. Spikclets containing two hermaphrodite flowers. Axis of the spikelet 



jointed above the persistent outer glumes. Outer glumes awnless. 

 Spikelets arranged in panicles. — Species 6. Tropics. Isachne R. Br. 

 Spikclets containing a single hermaphrodite flower and sometimes also a 

 male flower. Axis of the spikelet jointed below the outer glumes ; 

 spikelet falling as a whole 22 



22. First (lowest) outer glume awned, as well as the second. Spikelets one- 



flowered, directed to one side and disposed in panicles. — Species 4. 



Tropical and South Africa. Some are used as fodder. Oplismenus Beauv. 



First outer glume awnless 23 



23. Second outer glume apparently removed from the first by a conical or 



cylindrical, strongly-haired swelling at the base, usually awned or muc- 



ronate. Spikelets in panicles 25 



Second outer glume without a basal swelling 24 



24. First outer glume as large as or larger than the second, papery. — Species i. 



South-west Africa to Angola. (Under Päwicmw L.). Leucophrys Rendle 



First outer glume much smaller than the second. — Species 20. Some are 



used as ornamental or fodder-plants. (Including Monachyron Pari, 



and Rhynchelytrum Nees, under Panicum L.) Tricholaena Schrad. 



25. Second outer glume bearing, like the third, a long, twisted a\\Ti. — Species i. 



German East Africa Acritochaete Pilger 



Second outer glume unawned. — Species 220. Some (especially P. milia- 

 ceum L., millet, and P. sanguinale L.) are cultivated as cereals, others 

 furnish vegetables, syrup, or fodder, or are used for plaiting-work or as 

 ornamental plants. (Including Axonopus Beauv., Digitaria Pers., 

 Echinolaena Desv., Sacciolepis Nash, and Syntkerisma Walt.) Panicum L. 



26. (7.) Outer glumes 3, the lowest smaller than the others, the uppermost 



sometimes including a male flower. Rachis and branches of the in- 



. florescence not jointed. [Tribe TRISTEGINEAE.] .... 27 



Outer glumes i — 3 ; if 3, then the lowest larger than the uppermost. 30 



27. Spikelets arranged in spikes. First and second outer glume minute, the 



third awned. — Species 3. Abyssinia Beckera Fresen. 



Spikelets arranged in panicles. Secord outer glume not ver}' small. 

 Flowering glume awnless 28 



28. Lowest outer glume minute, like the second awnless, the third more or less 



distinctly awned. Spikelets arranged singly along the branches of 

 the panicle. — Species i. Tropical and South-east Africa. Used as a 



fodder-grass Melinis Beauv. 



Lowest outer glume not very small ; the third awnless, rarely both the 

 second and third awned 29 



29. Outer glumes, at least the second, awned. Spikelets arranged singly along 



the branches of the panicle. (See 24.) . . Tricholaena Schrad. 



