Trees & Flowers

Specimen Trees

As an Arboretum, growing and maintaining specimen trees is our primary objective. We also wish to help visitors to the Arboretum to make knowledgeable decisions about trees they may choose to plant on their own property.

In 2013, we began a program to properly identify and label the trees in the Arboretum that we classify as 'specimens'. Visitors can look at the tree, identify it, and begin the determination of its place in their plans. All commemorative trees (that are specimen trees) are labelled.

You can download a summary of the details of species we have planted and are maintaining. You can also visit Connon Nurseries and Uxbridge Nurseries where we source some of our specimen trees. Their online data is usually extensive and may help in selecting an appropriate tree specimen.

Download Specimen Tree List

Insect Pests of Trees

Valuable information on threats to trees can be found on the City of Toronto website.

The Sesquicentennial Tree

Having a very old and very beautiful Bur Oak that has been growing here for almost 200 years is a great joy. It gave us the opportunity to participate in Aurora's Sesquicentennial (150 years) celebrations in a way that is meaningful for the Arboretum.

On July 1, 2013, during Aurora's traditional celebration of Canada's birthday, a sign was unveiled declaring this Bur Oak as "Aurora's Sesquicentennial Tree". The participants were: Mayor Geoff Dawe, Arboretum Chair Irene Clement, and Bob Willson, representing the Willson family that included Lambert Willson, after whom Lambert Willson Park was named.

Sesquicentennial Tree Sign

Wildflowers

Below is a list of wildflowers that have been catalogued in the Arboretum. Visit the Photo Gallery page to see photos of the many wildflowers in the Arboretum.

May Wildflowers

Anemone, wood Anemone quinquefolia
Buttercup, common Ranunculus acris
Chamomile, scentless Matricaria maritina
Chickweed, common Stellaria media
Clover, red Trifolium pratense
Clover, leart hop Trifolium dubium
Dandelion, common Taraxacum officinale
Dock, curled Rumex crispus
Fleabane, common Erigeron philadelphicus
Forget-me-not Myosotis scorpioides
Grass, blue-eyed Sisyrinchium montanum
Marigold, marsh Caltha posultris
Mustard, garlic Alliara officinalis
Mustard, tower Arabis glabria
Mustard, white Brassica herta
Rocket, dame's Hesperis matronalis
Shepherd's purse Capsella bursa pastoris
Snowy Campion Sikene nevea
Strawberry, common Fragaria virginia
Trefoil, bird's foot Lotus corniculatus
Vetch, purple common Vicia americana
Yarrow Achillia millefolium

July Wildflowers

Agrimony Agrimonia gryposepala
Angelica Angelica atropurpurea
Arrowhead, broad-leaved Sagittaria latifolia
Avens, yellow Geum alleppicum
Bindweed, hedge Conolvolas sepium
Black-eyed Susan Rudbeckia serotina
Blueweed Echiem volgare
Burdock, common Arctium minus
Butter & Eggs Linarda vulgaris
Catnip Nepeta cataria
Cattail, common Typha latifolia
Cinquefoil, rough-fruited Potentilla recta
Cucumber, wild Echinocystis lobata
Elecampane Inula helenium
Fleabane, rough Erigeron strigosus
Foxglove, beard'otongue Penstenon digitalis
Hemlock, spotted water Cicuta macolata
Joe Pye Weed Eupatorium maculatum
Knaoweed, black Centaurea nigra
Lettuce, prickly Lactuca scariola
Lily, day Hemerocallis fulva
Loosstrife, fringed Lysimachia ciliata
Loosstrife, purple Lythrum salicaria
Mallow, musk Malva moschata
Parsnip, wild Pastinaca sativa
Primrose, yellow evening Oenothera biennis
St. John's Wort Hypericum perforatum
Tansy, common Tanacetum vulgare
Thistle, bull Cirsium vulgare
Thistle, spinyu leaved sow Sonchus asper
Vervain, blue Verbena hastata
Willow, herb hairy Epilobium hirsutum

June Wildflowers

Alfalfa, Lucerne Meticago sativa
Avens, yellow Geum allappicum strictum
Barley, foxtail Hordeum jubatum
Bedstraw, smooth Gallium mollugo
Bindweed, field Convovulus arvensis
Blackberry Rubus
Brome, smooth Bromus inermis
Burdock, common Arctium minus
Chess Bromus secalinus
Chicory Cichorium intybus
Cinquefoil, common Potentilla canadensis
Clover, aliske Trifolium hybridum
Clover, white Trifolium repens
Clover, white sweet Melilotus albe
Clover, yellow sweet Melilotus officinale
Coreopsis Coriopsis lansealata
Creeping Charlie Glecoma hederacia
Daisy, ox eye Chrysanthemum leucanthemom
Foxtail, green Setaria viridus
Goat's Beard Dragopogon pratensis
Grape, wild Vitus labrusca
Hawkweed, Kill Devil Hieracium florentinon
Heal-All Prunella vulgaris
Hound's Tongue Cynoglossum officionale
Iris, yellow Iris pseudocorus
Joe Pye Weed Eupatorium purpureum
Lobelia, long-leaved Lebelia elongata
Milkweed, common Asclepias syriaca
Motherwort Leonuris caediaca
Mullien, common Verbascum thapsus
Mustard, wild Sinapis arvensis
Nettle, slender Urtica gracilis
Nightshade Solarum dulcamara
Parsnip, cow Heracleum lanatum
Queen Anne's Lace Daucus carota
Raspberry, wild Rubus adaus
Rue, tall meadow Thalictrum polygamum
Soft Rush Juncus lanatum
Spurge, leafy Euphorbia esula
Thistle, Canada Cirsium arvense
Thistle, sow Sonchus arvensis

August Wildflowers

Aster, bushy Aster dumosis
Aster, large-leafed Aster macrophyllus
Bouncing Betty Saponaria officinolis
Goldenrod, lance-leaved Solidago graminfolia
Goldenrod, late Solidago gigantiea
Knapweed, brown Centaurae jacea
Touch-me-not, spotted Impatiens capensis
Turtle Head Chelone giabra