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- Pale Face - Rock Hibiscus (and see the Note for flower color)
- Palmillo - Soaptree yucca
- Palo Blanco - New Mexican Forestiera
- Palo de Hierro - Ironwood_(=Desert Ironwood)
- Palo fierro - Ironwood_(=Desert Ironwood)
- Palo verde
-
- Blue Palo Verde - Cercidium floridum
- Foothills Palo Verde - Cercidium microphyllum
- (- 1 -) Parish Viguiera - Viguiera deltoidea, var. parishii
Parish Viguiera
See: Viguiera, Asteraceae - Parish Goldeneye
- Parish's Goldeneye - Annual Goldeneye
- (- 2 -) Parry Dalea - Dalea parryi
Parry Dalea
See: Dalea, Fabaceae/Faboideae - (- 3 -) Parry's Agave - Agave parryi
Parry's Agave
Parry's century plant
Mescal
See: Agave - Parry's century plant - "Parry's Agave"/Agave parryi
- Pencil Cholla - Diamond Cholla
- (- 4 -) Perezia - Acourtia wrightii, (Perezia wrightii)
Perezia
See: Acourtia/Perezia, Asteraceae - Pichichagua - Desert Holly /#1
- Pigeonberry - California Buckthorn
- Pig-Nut - Jojoba
- Pincushions:
- (- 5 -) Fremont's Pincushion - Chaenactis fremontii
Fremont's Pincushion
Morning Bride
See: Chaenactis, Asteraceae - (- 6 -) Esteve's Pincushion - Chaenactis stevioides
Esteve's Pincushion
Steve's Dustymaiden
False Yarrow
Broad Leaved Chaenactis
See: Chaenactis, Asteraceae - (- 7 -) Mojave pincushion - See: Chaenactis xantiana
- (- 8 -) Pine - Pinus
- Pinguica - See: Manzanita, (Pungens)
- Pink funnellily - Funnel Lily
- Pink Three-Flower - Trailing Four O'clock
- Pinkbracted Manzanita - See: Manzanita, (Pringlei)
- Pinyon Pine - Pinyon pine
- (- 9 -) Pinyon Pine
-
- Single-leaf Pinyon - Pinus monophylla
- Plantas muy malas - Desert Globemallow
- Plicate Coldenia - Crinkle Mats
- Pointleaf Manzanita - See: Manzanita, (Pungens)
- Polished Willow - Willows: Bonpland Willow
- "Prickly Pear cacti" - See: Opuntia
"Cholla cacti" - See: Opuntia - Prickly Poppy - Bluestem Pricklepoppy
- Pringlei Manzanita - See: Manzanita, (Pringlei)
- Puccoon - Fringed Gromwell
- Punche - Desert Tobacco
- (- 10 -) LCRV-Puncture Vine(Goatheads) - Tribulus terrestris
Goatheads, Goats Head
Puncture Vine(Tribulus terrestris)
Puncture Weed
Ground Burr Nut
Torrito
Bull Head, Tackweed
Caltrop, Yellow Vine
See: Tribulus - Puncture Weed - Puncture Vine(Goatheads)
- Puna Grass - Russian Knapweed
- Pygmy Poppy - Little Gold Poppy
Read more about this topic: List Of Plants By Common Name (Sonoran Desert)