Pistachionut, Pistacia vera.

Hydrangea.

Honesty, Lunaria annua.

Rose, Rosa rubiginosa.

PerfoliateAlexanders, Smyrnium perfoliatum.

Pincushionflower, Scabiosa stellata 'Paper Moon'.

Rose, Rosa glauca.

Pasque flower, Pulsatilla vulgaris.

Teasel, Dipsacus fullonum.

Balloonflower, Platycodon grandiflorus.

Poke Root, Poke weed, Phytolacca americana.

Poppy, Opium poppy, Papaver somniferum.