Pyrus calleryana – Callery Pear

Botanical Family Ranunculaceae

Bloom Time April

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Granulate/Perforate

Tectum Semitectate

Size (um) 

Shape Round

Pollen Color Light Green

Honey Bee Resources

Pollen Source •

Nectar Source • •

Polemonium reptans – Jacob’s Ladder

Botanical Family Polemoniaceae

Bloom Time April – June

Pollen Characteristics

Dispersal Unit Monad

Aperture Number Inaperturate

Aperture Type N/A

Ornamentation Porate

Tectum Semitectate

Size (um) 

Shape Round

Pollen Color 

Honey Bee Resources

Pollen Source

Nectar Source

Ulmus americana – American Elm

Bloom Time March – April

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 4

Aperture Type Colpus

Ornamentation Psilate/Granulate

Tectum Eutectate

Size (um) 

Shape Round

Pollen Color Yellow, Green

Honey Bee Resources

Pollen Source • •

Nectar Source •

Prosartes lanuginosa – Yellow Mandarin

Botanical Family Liliaceae

Bloom Time April – June

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 1

Aperture Type Sulcus

Ornamentation Granulate/Perforate

Tectum Eutectate

Size (um)

Shape Round

Pollen Color

Honey Bee Resources

Pollen Source

Nectar Source

Sassafras spp. – Sassafras

Botanical Family Lauraceae

Bloom Time April – May

Pollen Characteristics

Dispersal Unit Monad

Aperture Number N/A

Aperture Type Inaperturate

Ornamentation Echinate/Granulate

Tectum Eutectate

Size (um) 40

Shape Round

Pollen Color Yellow

Honey Bee Resources

Pollen Source • •

Nectar Source •

Halesia carolina – Carolina Silverbell

Botanical Family Styracaceae

Bloom Time April

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Granulate/Perforate

Tectum Semitectate

Size (um)

Shape Round

Pollen Color Dark Yellow

Honey Bee Resources

Pollen Source • •

Nectar Source • •

Flower photo contributed by Mount Cuba

Acer rufinerve – Grey Snake-Bark

Botanical Family: Sapindaceae

Bloom Time April – May

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Colpus

Ornamentation Striate

Tectum Semitectate

Size (um) 42

Shape Round

Pollen Color

Honey Bee Resources

Pollen Source

Nectar Source