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Plants of Pennsylvania

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

437,676
recent observations
50
species listed
50
plants

Naturalists have logged 437,676 research-grade observations across the 50 most-recorded species in Pennsylvania. The most frequently seen is the Garlic Mustard, with 16,231 recorded sightings.

Most-observed plants in Pennsylvania

Garlic Mustard
Alliaria petiolata
16,231 observations
Mayapple
Podophyllum peltatum
14,226 observations
White Snakeroot
Ageratina altissima
13,747 observations
American Pokeweed
Phytolacca americana
13,068 observations
Common Milkweed
Asclepias syriaca
12,433 observations
Multiflora Rose
Rosa multiflora
12,337 observations
Eastern Skunk Cabbage
Symplocarpus foetidus
11,902 observations
Dame's Rocket
Hesperis matronalis
11,426 observations · iNaturalist
Common Mugwort
Artemisia vulgaris
11,019 observations · iNaturalist
Sensitive Fern
Onoclea sensibilis
10,984 observations
Ground-ivy
Glechoma hederacea
10,922 observations · iNaturalist
Christmas Fern
Polystichum acrostichoides
10,725 observations
American Tuliptree
Liriodendron tulipifera
10,045 observations
Common Jewelweed
Impatiens capensis
9,869 observations
Virginia Springbeauty
Claytonia virginica
9,839 observations
Eastern Poison Ivy
Toxicodendron radicans
9,637 observations
Lesser Celandine
Ficaria verna
9,548 observations · iNaturalist
Eastern White Pine
Pinus strobus
8,906 observations
American Beech
Fagus grandifolia
8,857 observations
Wineberry
Rubus phoenicolasius
8,699 observations
Ghost Pipe
Monotropa uniflora
8,643 observations
Yellow Trout Lily
Erythronium americanum
8,450 observations
Japanese Barberry
Berberis thunbergii
8,447 observations · iNaturalist
Red Deadnettle
Lamium purpureum
8,380 observations · iNaturalist
Amur Honeysuckle
Lonicera maackii
8,220 observations
Bloodroot
Sanguinaria canadensis
7,860 observations
Eastern Hemlock
Tsuga canadensis
7,809 observations
Wild Carrot
Daucus carota
7,733 observations
Partridgeberry
Mitchella repens
7,706 observations
Jack-in-the-Pulpit
Arisaema triphyllum
7,620 observations
Purple Crownvetch
Securigera varia
7,615 observations · iNaturalist
Autumn Olive
Elaeagnus umbellata
7,500 observations
Great Mullein
Verbascum thapsus
7,478 observations
Northern Spicebush
Lindera benzoin
7,412 observations
Box Elder
Acer negundo
7,160 observations
Sassafras
Sassafras albidum
7,131 observations
Chicory
Cichorium intybus
7,019 observations
Common Selfheal
Prunella vulgaris
6,917 observations · iNaturalist
Mountain Laurel
Kalmia latifolia
6,704 observations
Wild Geranium
Geranium maculatum
6,685 observations
White Clover
Trifolium repens
6,685 observations
Creeping Thistle
Cirsium arvense
6,372 observations
Mock Strawberry
Potentilla indica
6,280 observations · iNaturalist
Carolina Horsenettle
Solanum carolinense
6,172 observations
American Burnweed
Erechtites hieraciifolius
5,968 observations · iNaturalist
Red Clover
Trifolium pratense
5,950 observations
Canada Mayflower
Maianthemum canadense
5,897 observations
Staghorn Sumac
Rhus typhina
5,834 observations
American Jumpseed
Persicaria virginiana
5,805 observations · iNaturalist
Hemp Dogbane
Apocynum cannabinum
5,804 observations

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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