Victorian Plants. 113 



556. Clusters of spikelets spikelike-crowded. 



Flowers very small ; awns of the fruit-supporting bracts 

 very short ; stamen one. Elytrophorus. 2114 



Spikelets paniculate d or simply spicated ... ... 557 



567. Inflorescence smooth. 



Spikes solitary or oftener arranged in a panicle ; fruit- 

 supporting bracts membranous, bilobed at the summit; 

 awn minute ; stamens three. Diplachne. 2115 



Inflorescence beset with hairlets ... ... 558 



558. Fruit-supporting bracts usually bilobed and long-awned. 



Spikelets arranged in a panicle or raceme; bracts firm; fruit- 

 supporting bracts always shorter than the empty bracts, 

 dorsally convex and often fascicularly bearded, lined by 

 seven to nine venules ; the lobes usually pointed or short- 

 awned. (Danthoinia. ) Danthonia. 2116 



Fruit-supporting bracts entire, minutely awned. 



" Reeds," often tall; spikelets arranged in an ample panicle, 

 their rhacheoles beset with long and soft hairlets ; fruit- 

 supporting bracts transparent ; stamens three. 



Arundo. 2121 



AC0T1ZT.EDONEAE VASCULARES. 



RHIZ.OSPERMAE. 



559. Floating minute flat plants much branched. 



Plants often somewhat reddish ; leaf -like organs in rows ; 

 fruit-masses transparent, globular, axillary, sessile. 

 Figure 127. Azolla. 2122 



Submersed or semiaquatic small plants ... 560 



560. Fronds stalked, their four flat segments placed cross- 



like. 



Fruit-masses hard, compressed, basal, often stalked. 

 Figure 128. Marsilea. 2123 



Fronds reduced to thinly cylindrical and pointed stalk- 

 like organs, without any foliaceous expansions ... 561 

 i 



