582 GRAMINACEAE 



acute leaves and larger anthers, it is the var. suh-spicata (Parnell, 

 Grasses, 214, of Poajluitans). 



A viviparous form was found by Mr. F. Tufnail near the Kennet 

 mouth, Reading, in 1896. 



P. fluitans is found plentifully in all the districts ; the seeds are often 

 attacked by an ergot or smut. 



P. plicata, mihi. 



Ghjccrkc plicata, Fries, Mant. iii. 176 (1849). 

 Top. Bot. 487. Syme, E. B, xi. 98, t. 1753. Nyman, 830. Fl. Oxf. 349. 

 Native. Paludal. Ditches, margins of ponds and slow streams, often 



growing in the water. P. June-October. Not uncommon and 



widely distributed. 

 First record. G. fluitans, var. plicata, Mr, H. Boswell and Mr, H. C. 



Watson in Britt. Contr. 1871. 



1. Isis. Wytham. Faringdon. Shrivenham. Appleton. Cumnor. 



2. Ock. South Hinksey, Laivson, 1872, in Herb. Oxf. Frilford. 



Wootton. Abingdon. Uffington. Shippon, Aston Tirrel. 

 Blewbury. Didcot. 



3. Pang. Pangbourn Marsh, Tufnail. Bradfield. Tidmarsh. 



Moulsford. 



4. Kennet. Nearly as common as G. fluitans throughout the Reading 



district, Tufnail. Theale. Padworth. 



5. Loddon. Shottesbi'ooke. Early. Ruscombe, Wokingham. 



Windsor Park, Ruscombe, 

 Var. DEPAUPERATA (Crepiu, PI. Rares Grit, Belg. fasc iv. 52, sub 

 Glyceria). 



1. Isis. Wytham. 2. Ock. Hinksey. Kennington. Uffington, 



3, Pang. Tilehurst. 5. Loddon. Coleman's Moor. Warren 

 Row. Finchampstead. 

 P. plicata is recorded for all the bordering counties except East 

 Gloucestershire. 



P. aciuatica, Kuntze, Rev, Gen. PI. ii. 782 (1891). Beed Meadow Grass. 



Gramen majus aquaticum, Ger. Em. 6, Poa aquatica, Linn. Sp, PI, 67, 



and Herb. Glyceria spectabilis, Mert. & Koch, Deutsch. Fl, i, 586. 



G. aquatica, Sm. Engl. Fl. i, 116 (1824), and Wahl. Fl, Gothob. 18 



(1820). 



Top. Bot. 486. Syme, E. B. xi, too, t, 1751, Nyman, 830, Fl. Oxf. 348. 



Native, Paludal. Sides of rivers, canals, and brooks. Common and 



widely distributed. P, July- August. 

 Fii'st record, Poa aquatica, Mavor's Agr. Berks, 1809, Given for Ham 

 Marsh in Russell's Cat. 1839, 

 The fruits are often infected w^ith Ustilago longissima. 

 P. aquatica is abundant by our larger streams, and makes a con- 

 spicuous feature in our river vegetation from its handsome panicle and 



