Packera

Panic Grass

Panicum

Pasque Flower

Penstemon 

Perovskia 

Phacelia

Phlox - Creeping

Phlox - Tall

Phlox - Woodland

Pigsqueak

​Pink Turtlehead

Pinks

​Platycodon 

Podophyllum

Polemonium

Polygonatum

Prairie Dropseed

Prairie Smoke

Primula / Primrose

Prostrate Speedwell

Pulmonaria  

Pulsatilla

Purple Prairie Clover

Purple Wine Cups

Pussytoes

Pycnanthemum

Ratibida

Rattlesnake Master

Red Hot Poker

Rodgersia

Rose Campion

Rose Mallow

Rough Blazing Star

Royal Catchfly

Rudbeckia

Russian Sage

rubra: MrGajowy3 via PixaBay
Coral Eye: Walters Gardens
Raspberry Splash: Walters Gardens
Goldsturm: David J. Stang, CC4, via Wikimedia Commons