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Achillea millefolium (yarrow), close-up of umbel inflorescence clusterJuly 1973
Lamp, Herbert F.
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Actaea pachypoda Elliott (white baneberry), inflorescenceMay 18 1978
Lamp, Herbert F.
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Tetraneuris herbacea Greene (lakeside daisy), habit, flowersMay 1975
Lamp, Herbert F.
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Tetraneuris herbacea Greene (lakeside daisy), habit, flowersMay 1975
Lamp, Herbert F.
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Agave palmeri Engelm. (Palmer's century plant), flowersJuly 17 1959
Lamp, Herbert F.
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Aletris farinosa L. (white colicroot), flowers and basal leaves
July 1973
Lamp, Herbert F.
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Allium cernuum Roth. (nodding wild onion), habit, leaves and flowers August 1973
Lamp, Herbert F.