l6o ROSACEAE 



There are several other forms which connect P. insititia with P. domestica. 

 The yellow-fruited form has been seen at Mortimer by Mr. Tufnail, and 

 I have noticed it near Appleton. 



P. insititia occurs in all the bordering counties. 



*P. domestica, Linn. Sp. PI. 475 (1753. Wild Plum. 



Comp. Cyb. Br. 500. Syme, E. B. iii. 118, t. 410. Nyman, 213. Fl. Oxf. 92. 



Denizen. Septal. Hedges. Not uncommon but probably in most, if 



not all, cases, the offspring of the garden plum or damson. Shrub 



or small tree. April-May. 

 First recorded by the author in the Flora of Oxfordshire, 1886. 



1. Isis. Cumnor. Kingston Bagpuze, FI. Oxf. Wytham. Buscot, 



Coleshill. Ashbury. Appleton. 



2. Ock. Cumnor Hill, Bolton King. Bagley. Cothill. Hagborne. 



Blewbury. Marcham. Cholsey. Wantage. Cothill. Sunning- 

 well. Challow. Charney Basset. Boar's Hill. Lockinge. 



3. Pang. Hawkridge. Cold Ash. Bradfield. Basildon, &c. 



4. Kennet. Mortimer, Tufnail. Shefford. Hungerford. Greenham. 



Aldei-maston. Theale, &c. 



5. Loddon. Winkfield. Shottesbrooke. Ashley Hill. Long- 



Moor. Windsor. Risely. Arborfield. Ruscombe. Cookham 

 Dean, &c. 

 There is considerable vd,riation in the plants placed under 

 P. domestica ; they mny be descendants of cultivated races of the plum 

 or fertile hybrids with the Bullace and Sloe. In fact, by rejecting 

 intermediates we may have three fairly marked species, viz. spinosa, 

 insititia, and domestica, as given in our lists, but in nature these species 

 are connected by a very varying series of forms. 

 P. domestica occurs in all the bordering counties. 



P. avium, Linn. Fl. Suec, ed. 2, 165 (1755). Gean, Wild Cherry. 



Top. Bot. 128. Syme, E. B. iii. 119, t. 411. Nyman, 213. Fl. Oxf. 91. 

 Native. Sylvestral. Coppices, woods, and hedges. Not uncommon, 



especially on the Chalk. Tree. April-May. 

 First recorded under the erroneous name of P. Padus, Bird's Cherry, in 



Mavor's Agr. Berks, 1809, and under the name of P. Cerasns by Mr. 



Baxter in Phaen. Bot. n. 100, 1834. Given by Mr. Pamplin as 



P. avium in Phyt. v. 154, 1854. 



1. Isis. Wytham. Appleton. Cumnor. Pusey. Buscot. Near 



Coleshill. 



2. Ock. Bagley, ' P. CerasMS,' ^«^^er. Cholsey. Boar's Hill, Uffing- 



ton. Wantage. Lockinge. Radley. Tubney. Marcham. 

 Wittenham. Blewbury. Tubney, &c. 



3. Pang. Streatley, Pamplin. Hermitage. Fence Wood, W. M. 



Rogers. Bradfield, Jenkinson. Englefield. Very large trees on 



