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Greene's Spiny-nut Popcornflower

Plagiobothrys greenei

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Low Popcornflower

Plagiobothrys humistratus

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Alkali Plagiobothrys

Plagiobothrys leptocladus

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Soft Popcornflower

Plagiobothrys mollis

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Downy Popcorn Flower

Plagiobothrys mollis var. mollis

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Rusty Popcornflower

Plagiobothrys nothofulvus

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Netted Popcornflower

Plagiobothrys reticulatus

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Plagiobothrys reticulatus var. reticulatus

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Fort Ross Popcornflower

Plagiobothrys reticulatus var. rossianorum

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Stalked Popcornflower

Plagiobothrys stipitatus

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Stalked Popcornflower

Plagiobothrys stipitatus var. micranthus

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Showy Great Valley Popcornflower

Plagiobothrys stipitatus var. stipitatus

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Pacific Popcornflower

Plagiobothrys tenellus

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Slender Popcornflower

Plagiobothrys tener

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Serpentine Popcornflower

Plagiobothrys tener var. subglaber

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Plagiobothrys tener var. tener

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Rough-nutlet Popcornflower

Plagiobothrys trachycarpus

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Wavy-stemmed Popcornflower

Plagiobothrys undulatus

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Planodes virginica

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Coast Plantain

Plantago elongata

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Redwool Plantain

Plantago eriopoda

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Goose Tongue

Plantago maritima

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Naked Plantain

Plantago subnuda

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White Bog Orchid

Platanthera dilatata var. leucostachys

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Sparse-flowered Bog-orchid

Platanthera sparsiflora

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Intermountain Bog Orchid

Platanthera tescamnis

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Arizona Sycamore

Platanus wrightii

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Annual Semaphoregrass

Pleuropogon californicus

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North Coast Semaphoregrass

Pleuropogon hooverianus

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Marsh Fleabane

Pluchea odorata

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Arrow Weed

Pluchea sericea

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Marsh Bluegrass

Poa leptocoma

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Bog Blue Grass

Poa leptocoma ssp. leptocoma

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Douglas' Pogogyne

Pogogyne douglasii

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Douglas' Mesamint

Pogogyne douglasii ssp. parviflora

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Thymeleaf Beardstyle

Pogogyne serpylloides

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Western Sky Pilot

Polemonium occidentale

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Desert Combleaf

Polyctenium fremontii

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Broadleaf Knotweed

Polygonum minimum

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Parry's

Polygonum parryi

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Fruitleaf Knotweed

Polygonum polygaloides ssp. confertiflorum

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Kellogg's Knotweed

Polygonum polygaloides ssp. kelloggii

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Narrow Leaved Cottonwood

Populus angustifolia

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Fremont Cottonwood

Populus fremontii ssp. fremontii

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Quaking Aspen

Populus tremuloides

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Black Cottonwood

Populus trichocarpa

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Fleshy Porterella

Porterella carnosula

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Alpine Pondweed

Potamogeton alpinus

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Broad-leaved Pondweed

Potamogeton amplifolius

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Small Pondweed

Potamogeton berchtoldii

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Diverse-leaved Pondweed

Potamogeton diversifolius

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Leafy Pondweed

Potamogeton foliosus

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Leafy Pondweed

Potamogeton foliosus ssp. foliosus

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Grass-leaved Pondweed

Potamogeton gramineus

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Shining Pondweed

Potamogeton illinoensis

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Floating Leaved Pondweed

Potamogeton natans

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Long-leaved Pondweed

Potamogeton nodosus

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Small Pondweed

Potamogeton pusillus

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Richardson's Pondweed

Potamogeton richardsonii

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Silverweed

Potentilla anserina