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Verbesina alternifolia (L.) Britt. ex Kearney (wingstem), close-up of flowersDecember 1988
Dritz, Ken
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Symphyotrichum puniceum (L.) A. Love & D. Love (glossy-leaf aster), stem with flowersOctober 1980
Dritz, Ken
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Symphyotrichum praealtum (Poir.) G.L. Nesom (willow aster), habitDecember 1980
Dritz, Ken
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Symphyotrichum lanceolatum (Willd.) G.L. Nesom (panicled aster), habit October 1981
Dritz, Ken
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Symphyotrichum firmum (Nees) G.L. Nelson (glossy leaved aster), habitDecember 1980
Dritz, Ken
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Symphyotrichum dumosum (L.) G.L.Nesom (bushy aster), close-up of flowersDecember 1980
Dritz, Ken
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Symphyotrichum dumosum (L.) G.L. Nesom (bushy aster), habitDecember 1980
Dritz, Ken
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Symphyotrichum ciliatum (Ledeb.) G.L.Nesom (rayless aster), close-up of flower budNovember 1980
Dritz, Ken
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Symphyotrichum boreale (Torr. & A. Gray) A. Löve & D. Löve (Northern bog aster), flower on stemMay 1985
Dritz, Ken
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Symphyotrichum boreale (Torr. & A. Gray) A. Löve & D. Löve (Northern bog aster), close-up of single flowerSeptember 1979
Dritz, Ken
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Quercus palustris (pin oak), male flowers, buds and leaves detailMay 1985
Dritz, Ken
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Quercus palustris (pin oak), male flowers cluster and leaf tips detailMay 1985
Dritz, Ken
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Neobeckia aquatica (Eaton) Greene (lakecress), close-up of flowersJune 1978
Dritz, Ken
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Ionactis linariifolia (L.) Greene (flax-leaved white-topped aster), habitDecember 1980
Dritz, Ken
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Cynanchum laeve (Michx.) Pers. (sand vine), close-up of flowersDecember 1980
Dritz, Ken
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Bidens tripartita L. (threelobe beggarticks) single plant, not yet floweringDecember 1980
Dritz, Ken
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Bidens frondosa L. (devil's beggartick) plant with several small yellow flowersDecember 1980
Dritz, Ken
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Bidens discoidea (Torr. & A. Gray) Britton (small beggarticks) small plantDritz, Ken
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Betula pumila (bog birch), male catkins and newly emerging leaves
May 1986
Dritz, Ken
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Berula erecta (Huds.) Coville (lesser water-parsnip), flowers and leaves July 1978
Dritz, Ken
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Bartonia virginica (L.) Britton, Sterns & Poggenb. (yellow screwstem), two flower stalksOctober 1978
Dritz, Ken
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Bartonia virginica (L.) Britton, Sterns & Poggenb. (yellow screwstem), flower stalksOctober 1978
Dritz, Ken