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Amelanchier xgrandiflora Rehder (apple serviceberry), form, habit
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Aesculus parviflora Walt. (bottlebrush buckeye), habit
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Aquilegia coerulea (Colorado columbine), botanical illustration
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Aesculus L. (buckeye), inflorescences and leaves
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Alnus glutinosa (L.) Gaertn. (European black alder), catkins
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Acer palmatum (Japanese maple), leaves with fall color
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Achillea millefolium (yarrow), close-up of flowers
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Acer campestre 'Compactum' (Dwarf hedge maple)
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Abies sp. (fir), needles
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Quercus imbricaria (shingle oak), habit, winter
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Quercus alba (white oak), bud detail
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Asclepias syriaca (common milkweed), umbels with flowers
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Betula pendula Roth (European white birch), habit
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Aquilegia canadensis L. (columbine), opening flower detail
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Asclepias syriaca (common milkweed), close-up of flowers, open and in budMehaffey, Scott A.
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Amelanchier sanguinea (Pursh) DC (round-leaved serviceberry), close-up of leaves with immature fruit (berries)Kohout, John
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Arnoglossum atriplicifolium (L.) H.Rob. (pale Indian-plantain) and Arnoglossum plantagineum Raf. (prairie Indian-plantain), habitsBeasley, Michael
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Betula pendula Roth (European white birch), trunk and branches
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Asclepias verticillata L. (whorled milkweed), close-up of flower umbelHarcourt, R. M.
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Aesculus hippocastanum L. (horse-chestnut), bud and stem
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Abeliophyllum distichum Nakai (white-forsythia), leaves