322 FLORA OF OXFORDSHIRE. 
5. Isis. Ditch-bank at foot of bridge in Binsey Lane, Bx. Ditch in 
Christ Church Meadow, 1851, Bu. 
6. Thame. Rycote Park, Bu. 
7. Thames. Binfield Heath. 
Berks. In Bercheria, Morison, 242. Kennington Lane, plentiful, 
Binsey, Radley. Bucks, Northants, Gloster W., Warwick. 
C. riparia, Curt. 
Top. Bot. 471. Syme, E. B. x. 167.1679. Nym. 767. 
Native. Paludal. River-, canal-, and ditchsides. Abundant in all the 
districts. P. May. 
First record, Std. 1794. 
Very variable. The spikes have sometimes a mixed inflorescence, being 
all subfemale; others occur with male flowers on the summit of each 
spikelet. The spikelets vary remarkably in shape, and the glumes also in 
length, sometimes being so short as to barely cover the fruit; occasionally 
they become extremely developed. The fruit also varies in shape and 
colour—probably there are two or three species ‘lumped’ in our riparia. 
C. paludosa, Good. 
Top. Bot. 470. Syme, E. B. x. 165. 1678. Nym. 768. 
Native. Paludal. Jiver-, pond-, and ditchsides, wet woods, etc. 
Generally distributed, but much less common than riparia. P. May, 
June. 
First record, Sib, 1794. C. acuta, Curt. non Linn. 
‘Behind Headington Hill, banks of the pond Magdalen Meadow.’ 
Var. Kochiana, Gaud. ‘Glumes with a long rough awn.’ 
4. Ray. Cherwell side. 
In Headington Wick a peculiar form occurred which Arth. Bennett 
tells me is an analogous form to that occurring in C. vesicaria, i.e. pendu- 
lina, Blytt. C. paludosa is very variable. 
C. vesicaria, D. Bladder Sedge. 
Top. Bot. 470. Syme, E. B. x. 170. 1682. Nym. 768. 
Native. Paludal. Brook- and ditchsides, wet meadows. Sparingly 
distributed. P. May, June. 
First record, Gr. eyper. majus precox spicis turgidis teretibus flavescentt- 
bus, ad rivulos, sed rarius observatur. Morison, iii. 242 (Bobart) 1699. 
4, Ray. Banks of the Cherwell, Sib. The Parks, Hb. Lawson. Otmoor! 
A. Fr. Kidlington, Addison’s Walk, H. Bos. Fencott, Rev. Moyle 
Rogers. Bicester, towards Blackthorn, Merton, Marston. 
5. Isis. ‘In ambulacris Coll. Audis Christi, Bobart/ Binsey Lane, 
Port Meadow, Cornbury, near Eynsham, near Yarnton. 
6. Thame. Cowley field, Sib. Bullingdon Bog, Bx. Between Oxford 
and Iffley, Ba./ 
Berks, Sandford, Iffley, Binsey. Northants, rare. Gloster E., Warwick. 
