Papaver somniferum
Opium Poppy
Believed to have originated in southeastern Europe and western Asia. To 4 ft. tall. Hairless gray-gree...
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Parahebe catarractae
From New Zealand. To 1 ft. high, 2 ft. wide, with narrow dark green leaves. Flowers are white with blu...
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Parkinsonia aculeata
Mexican Palo Verde
Native to southwestern U.S., Mexico. Rapid growth at first, then slowing; eventually reaches 15 to 30 ...
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Parkinsonia floridum
Blue Palo Verde
Native to the deserts of Southern California, Arizona, and Baja California. In gardens, it grows fast ...
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Parkinsonia microphyllum
Littleleaf Palo Verde
Native to Sonoran Desert of Southern California, Arizona, Baja California. Grows to 20 ft. high and wi...
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Parrotia persica
Persian Parrotia
Native to Iran. Slow growing to 15–35 ft. tall and wide; naturally multistemmed but can be train...
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Parthenocissus quinquifolia
Virginia Creeper
Native to the eastern United States. Big, vigorous vine that clings or runs over ground, fences, trell...
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Parthenocissus tricuspidata
Boston Ivy
Native to China, Japan. This vine is semievergreen in mildwinter areas, can grow at least 50 ft.. This...
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Paspalum vaginatum
Seashore Paspalum
Native to southeastern U.S. Makes an attractive lawn near coast; tolerates salty soil, heat, wear. Col...
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Passiflora caerulea
Blue Crown Passion Flower
This vine climbs 20 to 30 ft.. Its five-lobed leaves are smaller than the 3-in. leaves of Passiflo...
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Passiflora edulis
Known botanically as Passifloraedulis, this vigorous South American native climbs by tendrils...
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Passiflora x belotii
Hybrid between P. caerulea and P. alata. Among the best-known, most widely planted p...
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