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In May, in addition to maples and cherries, a diverse range of trees bloom, including hawthorn, holly, palm, oak, and dogwood.
Approximately 4% of specimens collected in May, which comprise multiple species, were not identifiable. These specimens likely include native blackberries, wild roses, cotoneasters, and other species of the rose family (Rosaceae).
Microscopic Images at x800 Magnification
Common hawthorn (Crataegus monogyna), 5/12/22
Vine maple (Acer circinatum), 5/2/22
English holly (Ilex aquifolium),5/18/20
Unidentified maple (Acer species), 5/4/23
English cherry laurel (Prunus laurocerasus), 5/12/22
Most likely bitter cherry (Prunus emarginata), 5/15/23
Windmill palm (Trachycarpus fortunei), 5/30/20
Oak (Quercus species), 5/10/21
Red osier dogwood (Cornus sericea), 5/18/20
California poppy (Eschscholzia californica), 5/17/21
Pacific or eastern dogwood (Cornus nuttallii or florida), 5/2/22
Pacific willow (Salix lucida), 5/14/23
Tulip tree (Liriodendron tulipifera), 5/28/19
Common camellia (Camellia japonica), 5/5/23
Apple (Malus species or hybrid), 5/10/22
Wisteria (Wisteria species or hybrid), 5/26/22
Horse chestnut (Aesculus hippocastanum), 5/6/20
Rockrose (Cistus hybrid), 5/31/19
Bigleaf maple (Acer macrophyllum), 5/55/22
Spanish bluebell (Hyacinthoides hispanica), 5/6/19
Mexican orange (Choisya ternata), 5/19/19
Japanese snowbell (Styrax japonicus), 5/26/18
Pine (Pinus species), 5/14/22
Rhododendron (Rhododendron species or hybrid), 5/9/19
Unidentified plant of the mustard family, 5/17/22
Walnut (Juglans species), 5/29/18
Buckthorn family (Rhamnaceae), 5/29/20
Likely cascara (Frangula purshiana) or California lilac (Ceanothus)Â
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