Knowledge Library

Every approved identification in the PollyMap network rolls up into a living knowledge page. Galleries, locations and seasonality update automatically.

pollen
Oak
21 verified specimens · 5 locations
pollen
Chenopod
13 verified specimens · 3 locations
pollen
Pine
11 verified specimens · 4 locations
pollen
Asteraceae
10 verified specimens · 2 locations
pollen
Grass
10 verified specimens · 4 locations
pollen
Artemisia
6 verified specimens
pollen
Juniper
6 verified specimens · 3 locations
pollen
unidentified
6 verified specimens · 4 locations
pollen
Poaceae
5 verified specimens · 1 location
pollen
Celtis
4 verified specimens
pollen
Elm (ulmus)
3 verified specimens · 1 location
pollen
fern spore
3 verified specimens
pollen
Hackberry
3 verified specimens · 2 locations
pollen
Mulberry
3 verified specimens · 3 locations
pollen
Elm
2 verified specimens · 2 locations
pollen
Eucalyptus
2 verified specimens · 2 locations
pollen
Mesquite
2 verified specimens · 2 locations
pollen
Nettle
2 verified specimens · 1 location
pollen
Olive
2 verified specimens · 1 location
pollen
Pine (Pinus spp.)
2 verified specimens · 2 locations
pollen
Unknown
2 verified specimens · 1 location
pollen
Aster/Daisy (Asteraceae)
1 verified specimen · 1 location
pollen
Astereacea
1 verified specimen · 1 location
pollen
Buckwheat
1 verified specimen · 1 location
pollen
Corn (Zea mays)
1 verified specimen · 1 location
pollen
Ephedra
1 verified specimen · 1 location
pollen
Fabaceae
1 verified specimen · 1 location
pollen
Maple
1 verified specimen · 1 location
pollen
Maple (Acer spp.)
1 verified specimen · 1 location
pollen
Mormon Tea
1 verified specimen · 1 location
pollen
Oak (Quercus)
1 verified specimen · 1 location
pollen
Olive (Olea) / Oleaceae
1 verified specimen · 1 location
pollen
Palm
1 verified specimen · 1 location
pollen
Palo Verde
1 verified specimen · 1 location
pollen
Plantain
1 verified specimen · 1 location
pollen
Poaeceae
1 verified specimen
pollen
Salix
1 verified specimen · 1 location
pollen
Sunflower family (Asteraceae)
1 verified specimen · 1 location
pollen
Sweetgum
1 verified specimen · 1 location
pollen
Unknown Pollen (possibly Grass/Poaceae)
1 verified specimen · 1 location
pollen
Walnut
1 verified specimen · 1 location
Microscope image
coming soon
pollen
Ragweed Pollen
Ambrosia artemisiifolia
A single ragweed plant can release a billion grains of pollen. Light, buoyant grains can travel 400+ miles, making ragweed the dominant fall allergen across America.