SPSS 



cxLTi. gii.vm[xe;e. 429 



Sabtribe 4. CnLORlDE^i:. Spilcelets rarely 1-, generally Reveral-flowerefl. 

 ssile, or in LeplocMoa very shortly pedicellate, on the under 8ule oi a 

 flattened, uniointed raehis. One or two of tlie lowest flowers oceasionaly 

 abortive or imperfect. Lowest glume very persistent, generally strongly 

 keeled and 1-nerved. Awn of flowering glume, if present, not twisted. 

 Ovary never hairy at top. Seed free or enclosed in a loose pericarp. 



Subtribe 5 Avenace.t:. Spikelets 2- or many-flowered, pedicellate, their 

 rachis generally slender, 1 or 2 lowest flowers occasionally male or neuter 

 Axis alwavs prolonged into an imperfect or rudimentary glume. Lowest 

 glume membranous, often equalling or exceeding the flowering glumes. 

 Flowering glume rarelv blunt, generally awned on the back or between the 

 teeth, with a mostly twisted or bent awn. Ovary occasionally hairy at top, 

 either free or adnate to the palea. 



Subtribe 6. Festucace.e. Spikelets rarely 2-, generally many-flowered, 

 pedicellate or very rarely almost sessile, axis ^^^^-^y^.? P^l^^''^^^,^"^; .^" 

 Lperfect glume which is generally rudimentary or bristle-like Flo«enng 

 elume, (in Pappophorum multifid,) often entire and blunt, sometimes awned, 

 but the awn is never twisted and, except perhaps in Bromus, is always ter- 

 minal. Empty glumes generally as thin or thinner than flowering glumes, 

 rawest oLJsi'onallyaient. ^Fruit free or adnate to the P; - St,i 

 always 2, except perhaps in Ceratoch/oa. Scales 2.- In Ehrharta the 

 2 lowest florets, and in Fhragniites the lowest are sterile.) 



Subtribe 7. Bambuse.^. Spikelets (in Cape genera) many-flowerod with 

 the axis prolonged into an imperfect glume. Scales 3. Stamens 3 o 

 6. Styles 2 or 3.— Arboreous or slii-ubby grasses. Leaves articulated at 



Subtribe 8. Hoedeacej^. Spikelets 1- or many-flowered sessile or very 

 shortly pedicellate on opposite sides of a zipag, jointed rachis, either soli- 

 tary or 2-3 together. Empty glumes not keeled, unequally nerved, stand- 

 ing^at right angles to the Ixis of the spike, upper one sometimes deficient. 

 Otherwise as in FestucacecB. 



Analysis of Genera. 

 Tribe 1. Paniceae. 



Subtribe 1. Eupanice^. 



la) Spikelets apparently 1-flowered, generally al- 

 most sessile and on one side ot a flattened 

 rachis. Lowest glume always obsolete; 

 lowest flower always neuter. Flowering 

 glume and palea hardening in fruit.— 

 Glumes nearly always thick . . . • • 1. Paspalum. 

 Spikelets arranged in a compact, spikc-hke 

 panicle. Flowering glume and palea not 

 hardening conspicuously in fruit. Flower- 

 ing glume of lowest spikelets with several 

 rows of hooked bristles. •••••„' -• -^"^°^^- 

 (h) Spikelets evidently 2-flowered.— (In BluJJia 

 incompletely 3-flowered. In sonu^ species 

 of Fanicum the lowest glume is extremely 

 small and almost obsolete.) 

 + Spikelets naked (not surrounded by an mvo- 

 lucre), never more than 2 together on the 

 same i)edicel. 



