46 FLORA OF OXFORDSHIRE. - 
plant is very typical on Shotover Hill. On the chalk hills it is replaced to 
a great extent by vulgaris and calearea. The variety with ciliate bracts, 
pedicels and sepals is P. ciliata, Lebel. A form closely allied to calcarea 
occurs on Tainton Quarries, and by the roadside between Burford and 
Brize Norton. 
P. oxyptera, Rchb. Syme, E. B. ii. 36.186. Nym. 83. 
Native. Pascual. Rare or overlooked. Dry pastures. P. June, July. 
First record, the Author, 1881. 
7. Thames. Lewknor on chalk hills. 
Warwick, Honington, in the Stour drainage. 
P. calcarea, F. Sch. Chalk Milkwort. 
Top. Bot. 62. Syme, E. B. ii. 38.188. Nym. 83. 
Native. Glareal. Chalk downs and stony places. Locally common. 
P. May-July. 
First record, F. Duthie, Report of Bot. Ex. Club, 1870. 
5. Isis. Burford Quarries and roadside, near the county border. 
7. Thames, Swincombe Downs, Duthie. In Oxon, A. W. Bennett, 
Journ. Bot. xv. 173. Goring, Hb. Lawson, 1871. Near Henley, 
H. Bos. Watlington, Grime’s Dyke, rare on Beacon Hill, abundant 
on Ewelme Downs and Common. Thins out very much to the East, 
its place being taken by P. vulgaris. 
Berks. Isley and Compton, H. Bos. Abundant on Streatley Hill, 
Moulsford, Pangbourne, Basildon, also in E. Gloster and Bucks. 
Varies with flowers dark blue, light blue, lilac, pink, red, and white. 
In the oolite very dark blue. 
This appears to be a well marked species. 
({Elatine hexandra, DC. Burfield Heath and near Virginia Water, 
Berks ; Warwick, Coleshill pool extinct ?]. 
Orv. XII. CARYOPHYLLEA, Juss. 
GITHAGO. D. 
~ Githago Segetum, Desf. Corn Cockle. 
Agrostemma Githago, L. Top. Bot. 68. Syme, E. B. ii. 74. 215. Br. 
175. Nym. 85. 
Colonist. Agrestal. Cornfields. Local. A. June-Aug. 
First record, Sib. 1794. Unlocalised. 
1. Stour. Sibford. 
3. Swere. Hanwell, 4. Fr. 
4. Ray. Common about Upper Heyford, Bx. MSS. Headington Wick, 
H. Bos. Islip, Stow Wood, Kirtlington. 
