GRAMINE/E. 149 



Phleum arenarium, Linn. 



3. Par Harbour, 1917, Miss M. Cobbe. 

 Mibora minima, Desv. Casual. 



3. On a sand-heap, Par, 1910, Davey, R./.C., /9//, p. 389. 



Agrostis canina, Linn. 



5. Ventongimps, Rilstone. 



*Var. pallida, Reichb. 



5. Shady bank, Gollawater, between Penhallow and Mithian, 

 1921, Rilstone. 



A. alba, Linn. (A. stolonifera, Linn), forma spiculis coloratis. 



3. Wall, Lostwithiel, 1920, Thurston. 



Dr. Stapf writes to me : ** The forms of A. stolonifera, which 

 include what is commonly called A. alba, seem to be ex- 

 tremely variable, by which I mean that they are responsive 

 to conditions of soil, water available, light, etc., and appear 

 frequently under a variety of forms, often of rather different 

 aspect. If you could form a representative collection of these 

 'varieties' as they occur in Cornwall, and state on the labels 

 under what conditions they were found growing, you would 

 help us to understand this embarrassing lot.'* E. Thurston. 



Var. maritima, Koch. 



3. "Par, Druce " (Flora). Par Sands, 1920, Medlin. 



5. Wall, Padstow, 1918, Thurston. 



*Var. major, Gaud (gigantea, Koch) . 



5. Field, Lambourne, Perranzabuloe, 1921, Rilstone. (ad var. 

 giganteam vergens). 



Var. prorepens, Koch. 



8. Wall, Penzance, 1921. Thurston. 



A. nigra, With. 



5. Lambourne, Perranzabuloe, Rilstone. 



*A. verticillata, Vill. Casual. 



3. Ballast-heap, Charlestown, Tresidder. 



