Key to Tasmanian Dicots
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Holcus (Poaceae) 4b:243  
Tasmania has two introduced species of fog grass (Holcus). One species (H. lanatus, Yorkshire Fog) is a very common weed of pastures, roadsides and waste ground. The species are moderately large grasses with softly hairy leaves that are up to 1cm wide. The inflorescence is a large panicle that is fairly compact, becoming more spreading with age. The spikelets are small (~5mm long) and have two flowers (rarely three, but in this case the third floret is tiny and lacking any reproductive parts). The key feature is that the lower flower is hermaphrodite, whereas lacks an ovary. The glumes are larger than the flowers, which have very short awns.
 

 
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