. Bulletin. Biology -- Ohio; Plants -- Ohio. 276 OHIO BIOLOGICAL SUEVEY Later in tlie siumner the places of these are taken by another set of plants, including: Cimucifufia rcfemosa (fi^. 15) Circaea lutetiana Phyrma leptostachya Aster divaricatus Adicca pumila Aristolochia serpentaria Saiiic'uhi C(rad('iisis Medeola rirf/iiiica. Fis;. 15. Black Cohosh (Cimut-ifuga in tlie Liriodendron Forest. C'lilorophylU-less phanoganis are represented in abundance by the parasitic Squaw-root, ConophiiUis Americanu, and Beech Drops, Lep- tamium Virginiana, and the saprophytic Monotropa uniflora and Hy- popy
. Bulletin. Biology -- Ohio; Plants -- Ohio. 276 OHIO BIOLOGICAL SUEVEY Later in tlie siumner the places of these are taken by another set of plants, including: Cimucifufia rcfemosa (fi^. 15) Circaea lutetiana Phyrma leptostachya Aster divaricatus Adicca pumila Aristolochia serpentaria Saiiic'uhi C(rad('iisis Medeola rirf/iiiica. Fis;. 15. Black Cohosh (Cimut-ifuga in tlie Liriodendron Forest. C'lilorophylU-less phanoganis are represented in abundance by the parasitic Squaw-root, ConophiiUis Americanu, and Beech Drops, Lep- tamium Virginiana, and the saprophytic Monotropa uniflora and Hy- popytis Americana. These Liriodendron "coves" once covered a large proportion of the northern section of our area. I^elow Clear Creek they are, and probably always were, scarce. Their place is taken almost everywhere by the hemlock forest which, as has been stated, does not extend north of that point. B. The Forest The succession of associations in the ui)land forest is seen by ascending the point of one of the long, narrow ridges between the ravines and walking back from the edge of the clitf through the pine woods into the oak forest and around to the head of ilip ravine where the upland merges with the lowland. TJic Cliff Top. At the tops of tVie cliffs there is a narrow strij) of what may be termed a miniature lielu^n tundia (tig. 16), since it possesses all of the essential features of the northern tundra. The sub- stratum is extremely acid to litmus jiajx-r. It is exposi'd to the extreme. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ohio Biological Survey. Columbus, Ohio : Ohio State University
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