901 



Pontederia, L. Pontederiaceae. 



P. cordata, L. North America. Bot. Mag. t. 1156. 

 " Water Plantain of Jamaica." 



Porrum, Tourn. See Allium. 



P. commune, Reichb. See A. Porrum. 



Portulaca, L. Portulacaceae. 

 " Purslane." 



P. grandiflora, Hook. Brazil. Bot. Mag. t. 2885. 



P. oleracea, L. Tropical regions. Sibth. Fl. Gr. t. 457. 



P. sativcii Haw. See oleracea. 



Potamogeton, L. Naiadaceae. 

 " Pondweed." 



P. acuminatus, Schum. See lucens. 



P. crispus, L. North & South Temperate regions. 

 Eng. Bot. ed. 3, t. 1413. 



P. densus, L. Northern & Temperate regions. Eng. 

 Bot. ed. 3, t. 1414. 



" Water Caltrops." 

 P. lucens, L. Tropics, &c. Eng. Bot. ed. 3, t. 1408. 



P. natans, L. Temperate & subtropical regions. 

 Eng. Bot. ed. 3, t. 1399. 



" Tench weed." 



Potentilla, L. Rosaceae. 

 " Cinquefoil." 



P. alba, L. Europe, Caucasus. Jacq. Fl. Auetr. 

 t. 115. 



P. alba, Moench. Sec caulescens. 

 P. alchemilloides, Lapeyr. Pyrenees. 



