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Plants of Pennsylvania

The plants most often spotted in Pennsylvania, ranked by recent research-grade observations.

441,088
recent observations
50
species listed
50
plants

Naturalists have logged 441,088 research-grade observations across the 50 most-recorded species in Pennsylvania. The most frequently seen is the Garlic Mustard, with 16,252 recorded sightings.

Most-observed plants in Pennsylvania

Garlic Mustard
Alliaria petiolata
16,252 observations
Mayapple
Podophyllum peltatum
14,233 observations
White Snakeroot
Ageratina altissima
14,066 observations
American Pokeweed
Phytolacca americana
13,246 observations
Common Milkweed
Asclepias syriaca
12,506 observations
Multiflora Rose
Rosa multiflora
12,399 observations
Eastern Skunk Cabbage
Symplocarpus foetidus
11,924 observations
Dame's Rocket
Hesperis matronalis
11,438 observations · iNaturalist
Common Mugwort
Artemisia vulgaris
11,120 observations · iNaturalist
Sensitive Fern
Onoclea sensibilis
11,035 observations
Ground-ivy
Glechoma hederacea
10,968 observations · iNaturalist
Christmas Fern
Polystichum acrostichoides
10,842 observations
American Tuliptree
Liriodendron tulipifera
10,189 observations
Common Jewelweed
Impatiens capensis
9,906 observations
Virginia Springbeauty
Claytonia virginica
9,877 observations
Eastern Poison Ivy
Toxicodendron radicans
9,687 observations
Lesser Celandine
Ficaria verna
9,555 observations · iNaturalist
Eastern White Pine
Pinus strobus
9,045 observations
American Beech
Fagus grandifolia
8,977 observations
Wineberry
Rubus phoenicolasius
8,751 observations
Ghost Pipe
Monotropa uniflora
8,685 observations
Japanese Barberry
Berberis thunbergii
8,602 observations · iNaturalist
Yellow Trout Lily
Erythronium americanum
8,456 observations
Red Deadnettle
Lamium purpureum
8,417 observations · iNaturalist
Amur Honeysuckle
Lonicera maackii
8,369 observations
Eastern Hemlock
Tsuga canadensis
7,884 observations
Bloodroot
Sanguinaria canadensis
7,873 observations
Partridgeberry
Mitchella repens
7,788 observations
Wild Carrot
Daucus carota
7,784 observations
Purple Crownvetch
Securigera varia
7,651 observations · iNaturalist
Jack-in-the-Pulpit
Arisaema triphyllum
7,635 observations
Autumn Olive
Elaeagnus umbellata
7,570 observations
Northern Spicebush
Lindera benzoin
7,523 observations
Great Mullein
Verbascum thapsus
7,512 observations
Sassafras
Sassafras albidum
7,251 observations
Box Elder
Acer negundo
7,195 observations
Chicory
Cichorium intybus
7,079 observations
Common Selfheal
Prunella vulgaris
7,010 observations · iNaturalist
Mountain Laurel
Kalmia latifolia
6,787 observations
White Clover
Trifolium repens
6,776 observations
Wild Geranium
Geranium maculatum
6,688 observations
Creeping Thistle
Cirsium arvense
6,462 observations
Mock Strawberry
Potentilla indica
6,364 observations · iNaturalist
Carolina Horsenettle
Solanum carolinense
6,240 observations
Red Clover
Trifolium pratense
6,006 observations
American Burnweed
Erechtites hieraciifolius
5,985 observations · iNaturalist
Canada Mayflower
Maianthemum canadense
5,917 observations
Staghorn Sumac
Rhus typhina
5,871 observations
Hemp Dogbane
Apocynum cannabinum
5,856 observations
American Jumpseed
Persicaria virginiana
5,836 observations · iNaturalist

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

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