21 



ANDROPOGON. 



1. Annual. (Kafir Corn and its varieties) ... A. soiyliuni. 

 Perennial 2- 



2. Panicle large, effuse, nodding. Racemes numerous, all 



long pedicelled (similar to A. sorghum but perennial). 



A. halepensis var. effusus. 



Panicle smaller, not effuse and nodding, or if effuse then 



racemes fewer in number and 2 nate 3 



3. Racemes solitary 4 



Racemes not solitary 6 



4. Lowest 2-6 pairs of spikelets male and awnless. Upper 



sessile spikelets awned A. contortus. 



Lower sessile spikelets not differing from the upper 5 



5. Racemes 7-8 tin. long. Joints of the rachis filiform. 



A. eeresiaeformis. 

 Racemes 2-5 inches long. Joints of the rachis stout ... 



A. hirtiflorus. 



6. Racemes silvery plumose, with hairs 5 lin. long ... 



A. eueomus. 



Racemes glabrous to silvery villous. Hairs never 5 I'm. 



long .' 7 



7. Racemes digitate, fascicled, or panicled, but not 2 



nate 8 



Racemes 2 nate. terminal on the culms or on numerous 

 branches I' 1 



8. Lateral racemes sessile 9' 



Racemes peduncled 10 



9. Lower glumes dorsally flattened. Keels broadly winged 



above A. distachyus. 



Lower glumes dorsally concave. Keels not winged. 



A. appcndiculatus. 



10. Racemes 1 articulate (i.e. reduced to 1 sessile perfect and 



2 pedicelled. male or barren spikelets) 



A. mon t kola var. trinii. 

 Racemes not 1 articulate 11 



11. Sessile spikelets alike in form, but differing in sex 



(Western spec) A. anmilatus. 



Sessile spikelets alike in form and sex 12 



12. Lower racemes shorter than the common rachis. Glumes 



pitted A. intermedins var. punelatus. 



Lower racemes longer than the common rachis IS 



13. Lower glumes of the sessile spikelets not pitted ... 



A. ischaemum var. radicans. 

 Lower glumes of the sessile spikelets pitted. A. pertusus. 



