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THE BOTANY OF THE GUAYANA HIGHLAND—PART II 



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FIG. 11. Andropogon perdignus Sohns. a, branch of inflorescence, x %; b, pair of 

 spikelets; c, sessile spikelet; d, first glume; e, cross section of first glume; /, sterile 

 lemma; g, fertile lemma; h, palea; z, lodicule; /, essential organs; k, ligule, junction of 

 sheath and blade; /, cross section of blade behind the ligule. b-g, k-l X 8; h-j X 20. Type. 



lous over the back; spathes prominent, as long as or longer than the raceme; 

 sessile spikelet 4-5 mm long (mostly 4.5 mm long), the first glume as long as the 

 spikelet (excluding the awn), 4-(probably 6-) nerved, deeply sulcate at the base, 

 the margins and tip scaberulous and ciliolate, the back flat, the margins in- 



