224 PRACTICAL BOTANY. 



Glumes keeled. Stamen 1 (in U. panimlata, L., however, 

 3 stamens). Panicle spiked, open. Uniola, 



Gr. V, 38. 

 W. IV. 44. 



Spikelets not 2-edged, lanceolate, or ovate GST 



637. Flowers lanceolate. Lower pale acute, mucronate, 

 or bristle-pointed. Glumes keeled, as are the pales, al- 

 most as long as the spikelet and 3-nerved. Spikelets 2- to 

 4-flowered, silvery and shining. Panicle narrowly spiked, 

 spike-like, ovoid, or oblong-ovate, interrupted, or lobed al 

 the base. Lower leaves sparingly hairy, or ciliate. 



^oeleria cristata, Fers. 



Gr. IV. 28. 



W. III. 34. 



Flowers ovate or lanceolate, not mucronate, nor 

 bristle-pointed. Spikelets 2- to 70-fiowered. Panicles 

 spreading , ■, ............ 688 



638. Ligule and throat of the sheaths bearded with long 

 villous hairs. Upper pale and axis of the spikelet persistent 

 after flowering. Lower pale keeled, 3-nerved, membrana- 

 ceous, like the glumes (not webby-hairy at the base). 



Eragrostis. 



Gr. IV. 34. 



W. IV. 39. 



Ligule and throat of the sheaths naked. Flowers 

 deciduous, together with the joints of the axes. Lower pale , 

 keeled, 5-nerved, usually cobwebbed at the base. Poa. 



Gr. IV. 33. 



■W. IV. 40. 



639. (564.) Stamens 5-60, inserted on the 5-parted calyx. 

 Succulent, prostrate, maritime herbs, with opposite leaves. 

 Pod 3- to 5-oelled, opening transversely. Styles 3-5, Flow- 

 ers axillary, short-peduncled. (50) Sesuvium 

 Stamens numerous. Calyx colored. In place of 

 a corolla, sometimes staminodia. (Hanunculaceoits plants). 



30 



Stamens not over 12 (or, if more, rudimentary). 

 Ovaries or styles 1-20 .640 



