DIVISION I.— FANICACEiE. 



Spikelets 1-, rarely 2-flowered ; lower flower when present stam- 

 inate or neuter, at maturity falling from the pedicels entire, in 

 groups, or together with certain Joints of the rachis. Kachilla not 

 produced beyond the flowers. (In IsuvIdk' the lower flower is per- 

 fect and the rachilla is articulate above the empty glumes.) 



""This division of Gramineae is very well defined by two char- 

 acters: the articulation of the pedicel below the spikelet or cluster 

 of spikelets, and the single fertile flower apparently terminal, with or 

 without a single male or sterile one below it. Where either of these 

 two characters fail, the plant should be referred to Poacea?. 



** As the spikelet falls away it usually leaves a slight dilation at 

 the apex of the persistent portion. This kiiul of articulation has 

 not been observed in any species of Poacea? except in Fi/t(/i-f/nif/iit(, 

 a genus of one species belonging to South Africa. In the Cciic/irns 

 group of the tribe I*anice:e, in the sul)tribe Anthe])hore{e of Zoysiea\, 

 and in some Andropogonea^ the articulation is not under each spike- 

 let. but under little clusters of spikelets; and in Maydere it is the 

 whole rachis of the si)ike or ear which disarticulates under each 

 female spikelet. The articulation is usually under the fertile s})ike- 

 lets only, and not under the males." Panicaceti? have never more 

 than four glumes, and sometimes only three, rarely only two. In 

 Isarhtie and He<k-mannia, and in very rare instances in some species 

 of Si'fttrid \('h((ma>raphix] and PanicHm, the lower flower may be 

 perfect, still it is usually sterile, excepting in the first genus men- 

 tioned. 



"The tribes of Panicacea3 run much into each other." 



13 



