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 • •

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 •

Clematis recta – Clematis

Botanical Family Ranunculaceae

Bloom Time May – July

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Psilate/Striate

Tectum Eutectate

Size (um) 22

Shape Round

Pollen Color Light Green, Light Yellow

Honey Bee Resources

Pollen Source

Nectar Source

Clematis orientalis – Orange Peel Clematis

Botanical Family Ranunculaceae

Bloom Time July – September

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Colpus

Ornamentation Granulate/Perforate

Tectum Eutectate

Size (um) 21

Shape Round

Pollen Color Light Green, Light Orange, Light Yellow

Honey Bee Resources

Pollen Source

Nectar Source

Penstemon calycosus – Smooth Beardtongue

Botanical Family: Plantaginaceae

Bloom Time May – June

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Granulate

Tectum Semi-tectate

Size (um) 25

Shape Round

Pollen Color Green, Tan

Honey Bee Resources

Pollen Source

Nectar Source

Flower photos contributed by Mount Cuba

Penstemon smallii – Small’s Beardtongue

 

Botanical Family: Plantaginaceae

Bloom Time April – June

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Granulate

Tectum Semi-tectate

Size (um)

Shape Round

Pollen Color Green

Honey Bee Resources

Pollen Source • • •

Nectar Source • • •

Vicia faba – Broad Bean

Botanical Family: Fabaceae

Bloom Time July – October

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Granulate/Psilate

Tectum Eutectate

Size (um) 44

Shape Round

Pollen Color Light Green, Green, Olive

Honey Bee Resources

Pollen Source • • •

Nectar Source •

Fava beans are a winter legume crop. Faba beans conserve the soil nitrogen and assets in breaking disease and weed cycles, and are therefore of great interest to farmers. The flowering of Faba beans is prolific, but only 10-20% of flowers actually produce pods. The presence of honey bees is said to accelerate the rate of set of bean pods. Studies have also observed that Faba plants with access to bees set more pods on the lower nodes and ripen earlier with significantly more seeds per pod. The use of the plant by honey bees has the potential to increase the yield by 19-52%. However, Faba beans provide very little nectar to honey bees, but do collect a reasonable quantity of pollen from the plants.

Sources:

Somerville, Doug. (2002). Honeybees in Faba Bean Pollination. NSW Agriculture