ORYZE^. 



169 



with the beak 5-8 mm. long, second 7-nerved; floret ellipsoidal, 5 



mm. long, shining, hard, of a dull ivory 



color. 



Mexico, Pringlc 3705. Also found in 

 Cuba, Trinidad, Central America to 

 Brazil. 



Tribe VI.— ORYZEiE. 



Spikelets laterally compressed, with one 

 terminal perfect or unisexual flower, en- 

 closed by a floral glume aiul palea, the lat- 

 ter usually 1-nervod. Empty glumes two 

 or more, very seldom numerous. Stamens 

 frequently six. Stigmas more or less elon- 

 gated. Grain usually with a snuiU embryo 

 and long, linear hilum. 



The close atllnity of Oryzeaa and Pba- Fm. 31.— O/.v^w hitifolia. 



I . 1 , I'. 1 1 rni Pistillate spikelet. 



laruleie luis olten boon recognizod. Tiie 



essential eluiraotor of botli resides in having the scale immedi- 

 ately under the single terminal perfect llower koolod or 1-nerved, 

 like the glumes, so as to make it uncertain whether it is a 

 glume or palea, — that is, whether it is attached to the raohis or 

 primary axis of the spikelet, or to a secondary or lloral axis reduced 

 to ii mere point. Uentham considers the scale in question .i floral 

 gUnne, and considers the palea as deficient. With this view the 

 OryzofB have 2-4 or rarely 3 glumes, all above tlie articulation of 

 the i)edice], and the PhalaridciB 4-G or rarely 5 glumes, the 'owest 

 pair persistent below the articulation of the rachilla. 



A Plants monoecious; anthers six or more. 



a. Spikes terminal and axdlary, the former pedunculate and 



stamimite, the latter sessile 35 



a. Inflorescence paniculate {b) 



b. Spikelets in pairs at each node of the branches of the pan- 

 icle, one sessile and pistillate, the other snudli'r podicol- 

 late and staminate; iloral glume linoar-oblong. . 36 



