Victorian Plants. 493 



2081. Awn from near the summit of the fruit-supporting 



bract. 



Alpine, rather dwarf, but somewhat robust ; leaves broadish, 

 nearly flat, never of conspicuous length ; panicle spike- 

 like, often of a darkish hue ; spikelets very small ; fruit- 

 supporting bract slightly shorter than the outer bracts, 

 minutely awned ; additional rhacheolar stalklet glabrous. 



A. iiivalis. 



Awn from near the middle of the fruit-supporting 

 bract. 



Seldom tall ; leaves narrow, but nearly flat ; panicle rather 

 short, almost cylindrical or scantily open ; spikelets much 

 crowded ; fruit-supporting bract nearly as long as the 

 outer bracts, acute ; awn slightly twisted and somewhat 

 exserted ; rhacheolar extension flowerless, beset with 

 . minute hairlets. A. densa. 



2082. Awn absent. 



Alpine, often dwarf ; leaves narrow, longitudinally bent 

 inward, the lower leaves rather elongated ; panicle 

 abbreviated, closely or moderately contracted, capillary- 

 branched ; spikelets somewhat violet-darkish ; fruit- 

 supporting bract awnless, considerably shorter than the 

 outer bracts ; fruit-covering bract undeveloped ; addi- 

 tional rhacheolar stalklet absent. A. Muelleri. 



Awn present, but short 



Flowerless stalklet within the spikelet quite rudi- 

 mentary or absent. 



Often tall; leaves generally broadish, flat or along the 

 margin somewhat incurved, gradually pointed ; panicle 

 often long, almost cylindrical or scantily open ; spikelets 

 always crowded ; fruit-supporting bract terminating in 

 four extremely short setular points ; its awn arising from 

 below the middle, hardly semi-exserted ; additional 

 rhacheolar stalklet almost or quite undeveloped. 



A. quadriseta. 



Flowerless stalklet within the spikelet conspicuous. 



Rather tall and somewhat robust ; leaves hardly long, 

 gradually pointed ; panicle almost cylindrical or scantily 

 open ; spikelets all crowded ; fruit-supporting bract nearly 

 as long as the outer bracts, somewhat rough outside, 

 slightly denticulated at the summit ; its awn arising from 

 below the middle, semi-exserted; additional rhacheolar 

 stalklet generally ciliolated, seldom bearing a bract. 



A. moutana. 



