Victorian Plants. Ill 



545. Spikelets awned. 



Spikelets unilateral, biseriate ; fruit- supporting bract 

 comparatively small, terminated by a short awn and 

 upwards succeeded by minutely awned empty bracts ; 

 stamens three. Chloris. 2088 



Spikelets awnless. 



Spikelets unilateral, biseriate ; fruit-supporting bract not 

 succeeded by any empty bracts ; stamens three. 



Cynodon. 2089 



546. Fruits two in each spikelet. 



Panicle of spikelets spreading or spike-like ; bracts all trans- 

 parent and shining; fruit-supporting bract awned; stamens 

 three ; fruit free within the covering bract. Aira. 2090 



Fruits more than two in each spikelet ... ... 547 



547. Staminate and pistillate spikelets on separate plants. 



Spikelets arranged in a spike, comparatively large ; all 

 bracts awnless ; fruit- supporting bract rigid ; stamens 

 three ; fruit free within its bract, but remaining enclosed. 



Distichlis. 2091 



Staminate and pistillate flowers in the same spikelets 548 



548. Spikelets regularly arranged in a spike, their sides 



turned to the rhachis. 



Spikelets alternate, much compressed ; fruit- supporting 

 bract dorsally convex, usually awned or pointed ; stamens 

 three ; fruit often adherent to the covering bract. 



Agropyron. 2092 



Spikelets irregularly arranged in a spike or oftener 

 dispersed in a panicle .... ... ... ... 549 



549. Fruit permanently adnate to the covering bract ... 550 

 Fruit free within its bracts ... ... ... ... 551 



550. Hilum of less than half the length of the fruit. 



Fruit-supporting bract usually awned; stamens three; styles 



infra-terminal ; fruit bearded at the summit. Bronius. 2094 



