6oO GRAMINACEAE 



called twitch grass which is so gi'eat a pest in arable fields. The 

 point of the growing root is covered with hard scales. I have seen 

 the living conical root of a Eumex pierced through by a root of 

 A. repens. 



A. repens is abundant in all the bordering counties. 



NARDUS, Linn. Gen. n. 65. 



N. striata, Linn. Sp. PL 53 (1753"), and Herb. Mat Grass. 

 Gramen simrieum juncifolhim, C. B. Pin. 5. 



Top. Bot. 507. Syme, E. B. xi. 197, t. 1824. Nyman, 846. Fl. Oxf. 355. 



Native. Ericetal. Heaths. Eai'e in the north of the county, but com- 

 mon on the heathy tract of the south-west. P. May- August. 



First record. Gramen Sparteum minimum Angliciim, P. 1199. On the 

 next place betwixt Windsor Forest and Redding, where they dig 

 Furz, Merreti's Pinax, 58, 1666. The description and figure in 

 Parkinson's Theatrum leave no doubt that this is the plant referred 

 to by Merrett. 



2. Ock. Cumnor Hurst, Baxter in Walk. Fl. 1834. Now almost 



extinct. 



3. Pang. Cold Ash Common, Mr. Bicheno in Mavor's Agr. Berks, 1809. 



Oare Common. Curridge. 



4. Kennet. Mortimer, Tufnail. Snelsmore Common. Aldermaston. 



Burghfield. Greenham Common. Inkpen. Newbury Wash. 

 Crookham Heatli. Hampstead Marshall. Wickham. Eather 

 common in this district. 



5. Loddou. Between Windsor Forest and Reading, Merrett. Near 



Eton, Gotobed in Mavor's Agr. Berks. Ascot. SunninghilL 

 Sunningdale. Bagshot Heath. Easthampstead. Crowthorn. 

 Wellington College. Finchampstead. Ambarrow. Risely. 

 Near Jouldern's Ford. Long Moor. Bearwood. Early. Woking- 

 ham. Bracknell. Windsor Great Park. 

 Nardus strida is recorded for all the bordering counties except 

 E. Gloucestershire, but it is very rare in Oxfordshire. 



HORDEUM, Linn. Gen. n. 93 (^Tournefort, Inst. t. 295). 



K. nodosum, Linn. Sp. PI. ed. 2, 126 ;i762), and of Herb, teste Munro. 



Meadow Barley. 

 H. secalinum, Schreber, Spic. Fl. Lips. 148 (1771). H. murinum, var. b, 



Linn. Sp. PI. 85 1,1753). H- pratense, Huds. Fl. Angl. ed. 2, 56 



(1778). 

 Top. Bot. 505. Syme, E. B. xi. 193, t. 1821. Nyman, 838. Fl. Oxf. 352. 

 Native. Pratal. In rich alluvial meadows and pastures. Locally 



abundant. P. June-July. 

 First record. H. pratense. Produces a considerable quantity of hay, 



