Andropogon. ] GRAMINEAE. 1201 
“Internodes of the spike truncate at the apex, but not cupped aoe. 1200} 
tSessile spikelets of all the pairs alike in sex and form if 
eduncles of solitary spikes enclosed in spathiform etseaths 
: ee my reolatus 
neles of spikes not enclosed in spathiform leaf-sheaths :— 
ag ay of upper spikelets and joints of rachis ssh strongly 
compressed, with thickened margins and a translucent centre 
(S Amphilophis) :— 
pikes small, of 1-3, rarely 4 pairs of spikelets, often reduced to 
3 spikelets, a sessile and 2-pedicelled ; panicles pyramidal, with 
capillary rachis and branches :— 
Herbaceous ; erect stems, simple or subsimple; leaves linear, 
hardly narrowed at base, with sheaths closed 
micranthus var. villosula. 
Suffruticose ; sarmentose stems much-branched ; leaves lan- 
ceolate, much narrowed at base, with lower sheaths open 
assimilis. 
> 
Spikes with numerous pairs of spikel 
Spikes 3-7, digitately subfascicled, pee lower longer than the 
rachis of the inflorescence; glume I. coriaceous, prt ie 
subperforately pitte rtusus 
Spikes usually very many, paniculate, rarely few racemose, 
; a pata nig shorter than the rachis of the inflorescence ; 
prae? a pitte ted intermedius. 
rane’ itted .........intermedius var. punctatus. 
Glume 
Pedicels of upper spikelets and joints of rachis terete, subterete, 
angular or laterally compressed, the centre not diaphanous :— 
Spikes with several or many pairs of spikelets ; tips of branches 
: 
4 of panicle not bearded :—{p. 1202] 
3 Glume I. not muricate; internodes of spikes terete or sub- 
terete :— 
Branches of panicle bearing spikelets close down to the 
rachis (§ pirewie cst et: sac tieelearccpireaniwrs cites ascicularis, 
Branches of panic eT below (§ Sorghum) :— 
i Sorghin 
agile : 
Spikelets softly ‘atiky, “with pale, rarely dark hairs 
alepensis, 
Spikelets villous, with rufous or purplish hairs 
Glume I, with muricate sides; internodes of oie rly 
compressed (§ Vetiveria) 
