Photographic image
Moehringia lateriflora (L.) Fenzl (bluntleaf sandwort), habitMay 1973
Lamp, Herbert F.
Photographic image
Moehringia lateriflora (L.) Fenzl (bluntleaf sandwort), close-up of flowerMay 1973
Lamp, Herbert F.
Photographic image
Baptisia bracteata (long-bracted wild indigo), flowers on stemMay 1976
Lamp, Herbert F.
Photographic image
Moehringia lateriflora (L.) Fenzl (bluntleaf sandwort), flowerMay 1973
Lamp, Herbert F.
Photographic image
Arisaema triphyllum (L.) Schott (Jack-in-the-pulpit), fruit September 1964
Lamp, Herbert F.
Photographic image
Asclepias hirtella (Pennell) Woodson (tall green milkweed), habitJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias hirtella (Pennell) Woodson (tall green milkweed), flowersJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias hirtella (Pennell) Woodson (tall green milkweed), close-up of flowersJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias purpurascens L. (purple milkweed), close-up of flowersJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias purpurascens L. (purple milkweed), close-up of flowersJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias purpurascens L. (purple milkweed), close-up of flowers and budsJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias purpurascens L. (purple milkweed), close-up of flowersJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias purpurascens L. (purple milkweed), flowers and leavesJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias purpurascens L. (purple milkweed), flowers, buds, leafJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias sullivantii Engelm. ex Gray (Sullivant's milkweed), umbels with flowers and budsLamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of follicleAugust 1973
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of folliclesAugust 1978
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of flowersJuly 28 1972
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of individual flowersJuly 28 1972
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of flowersJuly 28 1972
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), leaves and flowers on stemJuly 28 1972
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of monarch larva (caterpillar) on leafJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of wilted flowers with young follicle and leavesAugust 1972
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of follicles, open and closedNovember 1973
Lamp, Herbert F.
Photographic image
Asclepias syriaca (common milkweed), close-up of dispersing seedNovember 1973
Lamp, Herbert F.
Photographic image
Asclepias sullivantii Engelm. ex Gray (Sullivant's milkweed), close-up of umbels with flowers and flower budsJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias sullivantii Engelm. ex Gray (Sullivant's milkweed), close-up of flowersJuly 1973
Lamp, Herbert F.
Photographic image
Asclepias sullivantii Engelm. ex Gray (Sullivant's milkweed), habitJuly 1973
Lamp, Herbert F.