Spring Flora of Oklahoma 
233 
Orpine Family__ 
Orange, Osage _ 
Orange-root _ 
Ostrya____ 
Oval-leaved Bladder-pod 
Ovate-leaved Nama _ 
Oxalidaceae__ 
Oxytropis__ 
Oyster Plant _ 
58 
32 
45 
22 
53 
144 
83 
80 
183 
Pale Dock _ 34 
Pale Purple Cone-flower _197 
Pansy____, fL12 
Papaveracese__ 48 
Papyrius__ 32 
Parthenocissus____ 107 
Passifloracese--113 
Passion-flower Family _ 113 
Passion-flower__113 
Passiflora__113 
Pasture Rose - 62 
Pea Family _ 70 
Peach Family - 1 - 63 
Pearlwort, Decumbent _ 42 
Pecan — _ 17 
Pentstemon__162 
Pepper-vine __ _106 
Pepo_>_,___177 
Persimmon — -129 
Phacelia _ 143 
Philadelphus — - 59 
Philadelphia Fleabane__192 
Phoradendron-- 33 
Phlox ^Family _140 
Phlox — _140 
Phyllanthus_ _ 90 
Physalis — -157 
Pinnate Cynosciadium -124 
Pink Family - 43 
Pitcher’s Leather-flower - 47 
Pitcher’s Sage _154 
Pitcher’s Sandwort - 42 
Plantaginacese - 168 
Pla/nera ^---- , --- 30 
Plantago — —-^-169 
Plantain Family -168 
