In July, Himalayan blackberry pollen remains the most common in my beehives. A few unidentified species, with unique shapes that repeatedly appear over the years, have yet to be linked to specific plants or plant groups. They may come from uncommon garden plants from which I have not yet collected pollen.
Microscopic Images at x800 Magnification
Himalayan blackberry (Rubus armeniacus), 7/15/23
Hydrangea (Hydrangea species), 7/4/21
Chestnut (Castanea species or hybrids), 7/5/23
Evening primrose (Oenothera biennis), 7/15/23
Southern magnolia (Magnolia grandiflora), 7/4/23
White clover (Trifolium repens), 7/21/23
Chicory subfamily, 7/27/20
Probably Cat's ear (Hypochaeris radicata)
Unidentified species, 7/20/20
Maybe a species of Hydrangea
Unidentified species, 7/29/21
Old man's beard (Clematis vitalba), 7/20/19
St. John's wort (Hypericum species), 7/13/22
Linden (Tilia species or hybrid), 7/9/21
Common poppy (Papaver rhoeas), 7/19/19
Douglas' spiraea (Spiraea douglasii), 7/25/22
maybe Japanese meadowsweet (S. japonica)
Unidentified plant of the mint family, 7/10/21
Privet (Ligustrum species), 7/9/22
Hosta (Hosta species or hybrid), 7/10/19
Hedge bindweed (Calystegia sepium), 7/28/23
Red osier dogwood (Cornus sericea), 7/22/20, summer bloom
Buckthorn family, 7/2/21
Probably California lilac (Ceanothus)Â
Unidentified species, 7/12/18
Maybe golden rain tree (Koelreuteria paniculata)
Scale