KEY. 219 



and smaller than the pistillate, the latter more rigid, with 

 lengthened, plumose stigmas. 



Brizopyrum spicatum, Hook. 



Gr. IV. 32. 



W. IV. 41. 



II. Spikelets composed of perfect and staminate 

 flowers. Panicles 614 



III. Spikelets with the flowers always perfect (or 

 with one or a few additional neutral or rudimentary ones). 



619 

 614. Spikelets (5- to 10-flowered) all either staminate or 

 pistillate, except one or a few perfect ones. Styles much 

 protruded at the apex of the flower. Lower pale flattened- 

 boat-shaped, obscurely m^ny-nerved, acute, somewhat coria- 

 ceous. Spike oblong, flattened, 1 inch long 613, I. 



Spikelets (2- to 5-flowered) with only 1 or 2 stami- 

 nate flowers 615 



61^. Flowers surrounded by a tuft of long, silky hairs 

 from the axis of the spikelet, equalling them in length. 

 Spikelets narrowly lanceolate, with 3 to 5, rarely more 

 flowers — the lowest one staminate, the rest perfect. Glumes 

 very unequal. Lower pale narrowly-awl-shaped, thrice the 

 length of the upper. Panicle loose, nodding. 



Phragmites communis, Trin. 



Gr. V. 39. 



W. IV. 45. 



Flowers not surrounded by a tuft of long hairs. 



Spikelets 2- to 3-flowered 616 



016. Spikelets 3-flowered, the 2 lower flowers staminate, 

 awnless, or awned, the middle one perfect, with 2 stamens, 

 awnless. Glumes as long, as the flowers?. Hierochloa. 



Gr. VII. 53. 



W. IL 24. 



Spikelets 2-flowered — one flower staminate, the 



other x^erfect 617 



617. Lower flower staminate. Glumes unequal 618 



Lower flower perfect, awnless; upper one staminate, 

 its lower pale awned from the back, a little below the tip. 



Holcus lanatus, L. 



Gr. VL 52. 



W. IL 25. 



