155 



Tribe 8. Zoysieie. Alature spikelets falling entire and singly, or 

 in clusters. Floret 1. Rhacliilla not continued bey(md the floret. 

 Glumes equal, or the lower much smaller or suppressed. Valve small, 

 delicately membranous, 3-I-nerved. Spikelets in slender spiciform 

 IDanicles or racemes. 



Perotis ; Tragus. 



Tribe 9. Sporoboleje. Glujues and valves very similar. Floret 1. 

 Khacliilla very rarely continued beyond the floret. Valve membranous, 

 acute (jr obtuse, not changed when ripe, 1 -or more or less distinctly 

 o-nerved, awnless, usually olive green or olive grey ; side nerves, if 

 present, delicate, evanescent above. Seed often free in the delicate 

 pericarp. 



Sporobolus, The only genus. 



'I'rilje 10 Eragrostea\ Spikelets variously panicled, sometimes 

 silicate, or subspicate. Florets usually numerous and far exserted 

 from the glumes. Glumes and valves rather similar in general ajppear- 

 auce. Valves membranous to chartaceous, very often olive green or 

 olive grey, entire, or 3-cleft, -i nerved ; nerves evanescent above or 

 excurrent into bristles ; side nerves submarginal, glabrous or pidjescent 

 or finely ciliate below. Pales often persistent or subpersistent. 



Pogonarthria ; Diplachne ; Eragrostis. 



Tribe 11. Ohloridea'. Spikelets usually in 2-ranked, secund 

 spikes or spike-like racemes, rarely distinctly pedicelled and panicled. 

 Florets 1 to many. Valves generally membranous, truncate, emarginate 

 or t(X)thed, o-nerved ; nerves distant, subparallel, distinct, percurrent 

 or excurrent, and often ciliate all along, lateral submarginal (See 

 ^partina with 1-nerved valves, and Eleusine which has sometimes 

 additi(jnal side-nerves close to the middle nerve of the valve) ; awn if 

 present, straight, usually from a truncate or toothed tip. 



Cyndon; Michrochloa ; Ctenium; Harpechloa; Chloris: Eleusine; 

 Dactylocteni um ; Leptocarydium ; Crossotropis ; Triraphis. 



Tribe 12. Pappophoreie. Valves broad, cleft into 3 to many 

 sometimes subulate lobes with or without alternating fine straight 

 a^vns from the sinuses, usually many ner^•ed. 



Not represented in Natal. 



'J'ribe 13. Oryzea*. Spilselet^. all alike or more or less lietero- 

 morpbous aud unisexual. Fertde lloret 1. awidess, very rarely caudate- 

 arista to, teruiinal with 2 minute empty florets (valves) below it or 

 solitary. Glumes very minute or confluent into an annual rim or 

 suppressed. Pales 3-9 nerved. Stamens usually C, rarely more or 3-1. 



Potamophila ; Leersia. 



Tribe 14. Phalarideje. Spikelets all ahke. Fertile floret 1, 

 awnless, terminal with 2 empty florets (valves) below it. Glumes dis- 

 tinct, often equalling or exceeding the terminal floret. Pales 2-nerved 

 to nerveless. Stamens 6-3 (in the Afiican si"»ecies), or 4 or 2. 



Ehrharta ; Phalaris. 



