THE FLORAL LIST. 47 
POTENTILLA SILVESTRIS, Neck. =P. ERECTA, Hampe. 
POTENTILLA STERILIS, Garcke. 1855, Bogg. —3, 6, 9, 12, 16, 17, 18. 
POTERIUM MURICATUM, Spach. =P. POLYGAMUM, Waldst. & Kit. 
POTERIUM OFFICINALE, A. Gray. 1726, Bacon. —10, 17, 18. 
POTERIUM POLYGAMUM, Waldst. & Kit. 1896, Lees. +8. 
POTERIUM SANGUISORBA, L. 1726, Bacon. —r1, 12, 17, 18. 
PRIMULA ELATIOR, Jacq. 1906, Hawkins. +15. (On Chalky Boulder 
Clay only.) 
PRIMULA OFFICINALIS, Jacq. =P. VERIS, L. 
PRIMULA VERIS, L. 1820, Thompson. -+all. 
PRIMULA VERIS x VULGARIS. 1836, Dodsworth. —3, 4, 6,9, 12, 14,17, 18, 
PRIMULA VULGARIS, Huds. 1820, Ward. -—4, 6, 9, 17, 18. 
v. CAULESCENS, Koch. 1876, W.-P. +2. 
PRUNELLA VULGARIS, L. 1820, Thompson, -+all. 
PRUNUS AVIUM, L. 1836, J. Nicholson. —1, 9, 12, 14, 16, 18. 
v. HORTENSIS, W.-P. 1893, W.-P. +2, 3,17. (Railways.) 
PRUNUS DOMESTICA, L. 1866, W.-P. +2, 3, 5, 10, 17, 18. 
PRUNUS INSITITIA, L. 1836, Dodsworth. —1, 4, 8, 9, 10, 17, 18. 
PRUNUS PADUS, L. 1877, Parsons. +2, 10, 11,13. (Planted ?) 
PRUNUS SPINOSA, L. 1820, Thompson. -—g, 18. v. MACROCARPA,. 
Wallr. 1892, Fowler. +2. 
PSAMMA ARENARIA, Rom. & Schultz. =AMMOPHILA ARENARIA, Link. 
PTERIS AQUILINA, L. 1836, Dodsworth. -—g, 14, 17, 18. 
PULICARIA DYSENTERICA, Gray. 1836, Dodsworth. +all. v. GLABRA, 
Mihi. 1908, Mason. +14. 
PYROLA MINOR, L. 1856, Thompson. +3, (5?), 7, 10, (12), 13. 
[PYROLA ROTUNDIFOLIA, L. 1840, Miller. +(5).* The last species, I 
believe. Extinct now.] 
PYRUS ARIA, Ehrh. 1856, Bogg. 3,8, 10,15. (Bird sown from planted 
specimens ? ) 
PYRUS AUCUPARIA, Ehrh. 1836, Dodsworth. —4, 8. 9, 13, 14, 17, 18. 
(Like the last generally.) 
PYRUS COMMUNIS, L. 1878, Lees +7,11. (Rat sown?) 
PYRUS DOMESTICA, Mihi. 1893, W.-P. +2,17. (Railways.) 
_. PYRUS FENNICA, Bab. =P. PINNATIFIDA, Ebrh. 
PYRUS MALUS, L. 1200, William of Malmesbury. —g9, 18. (Water 
carried. Also perhaps rat sown ?) 
PYRUS MITIS, Wallr. =P. MALUS x DOMESTICA. 1857, Bogg. +3, 8, 
15, 16. (Crossed by bees. Only found round villages in Lincs.) c 
