AGROSTIDE^. 



357 



^iirea Gaud. Agrost. Ilelv. 1:70 (1811). 

 Nat. AiT. Brit. PI. 2:U8 (1821). 



Culms densely tufted, 30-GO cm. high, 

 blades on large plants 15 cm. long, 3-4 mm. wide. Panicle with 

 its base included or barely exserted above the upper sheath, usually 

 spreading, 20-30 cm. long, the scabrid rays in half-whorls of 5-9. 



A. effusa S. F. Gray, 

 Ligule 5-7 mm. long; 



Fig. 61. — Apeva Spica-venti. 

 Spikelet, destitute of stamens 

 aud pistil. (Richardson.) 



Fig. 63. 



Lagarus ova- 

 tus. Sjiikelct, 

 (Richardson.) 



Spikelets narrow, first glume 1.5-2.5 mm. long, second 2.3-3.3 mm. 

 long; fertile floret linear-lanceolate, 2-2.5 mm. long, the awn 

 5-10 mm. long; palea bearing 2 minute tufts of hairs at the base. 



Introduced with cultivated grasses and in ballast. 



Var. iNTEERUPTA (L.). Agrostis interru])ta L. Sp. PI. Ed. 2, 

 1:91 (1762). Ainra intemq^ta Beauv. Agrost. 31 (1812). 



This may be looked for. Plant slender, about 20 cm. high, 

 panicle interrupted, narrow, 10-15 cm. long. 



72. (145). LaguritsL. Sp. PI. 1:81 (1753). 



Spikelets 1-flowered, in a very soft dense ovoid or oblong spike- 



