JAN 11 1909 
The Ohio W'aturalist, library A 
^ ' NEW YORK 
PUBLISHED BY BOTANICAL 
The Biological Club of the Ohio State University. 
Volume IX. DECEMBER, 1908. 
No. 2. 
TABLE OF CONTENTS. 
Hubbard— Rock Terraces along the Streams near Columbus, Ohio. 397 
Morgulis —The Effect of Alkaloids on Regeneration in the Scarlet Runner Bean.... -104 
Schafkner— Plants on the Ohio State List not represented in the State Herbarium 413 
McCray— Meeting of the Biological Club . 41G 
ROCK TERRACES ALONG THE STREAMS NEAR 
COLUMBUS, OHIO. 1 
George D. Hubbard. 
Several striking terraces of solid rock occur along the Scioto 
and Olentangy valleys in the vicinity of Columbus. Their 
character has been revealed in the physiographic study of the 
four local quadrangles, a study recently undertaken by the 
Geological Survey of Ohio. They are related to the problem of 
the post-glacial, and in some cases of the earlier development of 
these valleys; and it has seemed best to abstract from the 
material collected in the general study all the data bearing on 
the rock terrace problem. 
So far as the quadrangles 2 involved are concerned, the ter¬ 
races may be found, ten or more in number, at intervals along the 
Scioto from the property of the Insane Asylum west of Columbus 
to the northern boundary line of the area; and four or more, 
along the Olentangy from near Powell to the same line. There 
are also the beginnings of several rock terraces along the Big 
Darby valley. 
The Scioto is on bed rock essentially all the way from the 
northern boundary to the old quarries north of the Asylum; and 
the Olentangy is similarly restricted from the same boundary on 
the north almost to Worthington, with occasional rock encoun¬ 
ters from there to well within the city limits. The Big Darby has 
encountered rock at numerous well distributed points from just 
below where it enters our area to a point midway between 
1. By permission of the State Geologist. Read before the Ohio 
Academy of Science, Granville, O., Nov. 28, 1908. 
2. Dublin, Westerville, East Columbus, and West Columbus. 
397 
