Vernonia acaulis – Stemless Ironweed

Botanical Family Asteraceae

Bloom Time June – August

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Echinate

Tectum Semitectate

Size (um) 39

Shape Round

Pollen Color

Honey Bee Resources

Pollen Source • •

Nectar Source • • •

Helianthus tuberosus – Jerusalem Artichoke

Botanical Family Asteraceae

Bloom Time August – September

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Echinate

Tectum Semitectate

Size (um) 25

Shape Round

Pollen Color Yellow

Honey Bee Resources

Pollen Source •

Nectar Source •

Stokesia laevis – Stokes’ Aster

Botanical Family Asteraceae

Bloom Time May – July

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Reticulate

Tectum Semitectate

Size (um) 

Shape Triangular

Pollen Color

Honey Bee Resources

Pollen Source

Nectar Source

Flower photo contributed by Mount Cuba

Eupatorium perfoliatum – American Boneset

Botanical Family Asteraceae

Bloom Time July – September

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Echinate

Tectum Semitectate

Size (um) 24

Shape Round

Pollen Color

Honey Bee Resources

Pollen Source

Nectar Source

Chrysanthemum rubellum – Chrysanthemum


Botanical Family
 Asteraceae

Bloom Time October

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Echinate

Tectum Semitectate

Size (um) 30

Shape Round

Pollen Color Yellow, Orange

Honey Bee Resources

Pollen Source •

Nectar Source •

Bidens ferulifolia – Apache Beggarticks

Botanical Family Asteraceae

Bloom Time October

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Echinate

Tectum Semitectate

Size (um) 23

Shape Round

Pollen Color 

Honey Bee Resources

Pollen Source •

Nectar Source •

Silphium laciniatum – Compass Plant

Botanical Family Asteraceae

Bloom Time July – September

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Echinate

Tectum Semitectate

Size (um) 

Shape Round

Pollen Color 

Honey Bee Resources

Pollen Source

Nectar Source