142 
The Ohio Naturalist. 
country adjacent to the laboratory were productive of many 
interesting objects for study, and reports on some of these will 
appear in later numbers of the Naturalist. Special excursions 
to Castalia, Lakeside, Kelley’s Island, Put-in-Bay and Green 
Island were not only enjoyable, but furnished much of profit in 
the w T ay of collections. One of the most appreciated feature was a 
visit to the U. S. Kish Commission Hatchery at Put-in-Bay, which 
furnished an opportunity to watch the plankton work done on 
the Shear Water under the direction of Prof. H. B. Ward. 
A series of Friday afternoon lectures on biological problems, 
with titles, “ Adaptation in Animal Life,” “Aquatic Life,” “Air- 
breathing Animals,” “Some Phases of Evolution,” “Some 
Problems in Applied Zoology,” “ Mimicry and Protective Resem- 
blance in Nature,” were given by Prof. Osborn, and one on 
“ Natural Selection,” by Prof. Landacre. 
THE MAXIMUM HEIGHT OF PLANTS III. 
John H. Schaffner. 
During the past summer, the plants mentioned below were 
measured by the writer in northern Kansas. A number of species 
grew far beyond the height mentioned in our manuals, although 
there was a very severe drought the entire summer. The height 
given probably approaches the maximum in but few cases and a 
better growing season might produce a very noticable increase in 
size. The measurements are given in comparison with those of 
Britton and Brown’s Flora. 
Polygonum lapathifolium L 
Polygonum camporum Meisn 
Froelichia floridiana (Nutt.) Moq . . 
Chenopodium album L. . . . 
Anemone virginiana L. (Ohio) 
Polanisia trachysperma T. & G 
Cassia chamaecrista L 
Astragalus carolinianus L 
Meiboinia illinoensis (Gr. ) Ktz. 
Euphorbia dentata Michx 
Euphorbia hexagona Nutt 
Euphorbia nutans Lag 
Ceanothus ovatus Desf 
Ammannia coccinea Rottb 
Gaura parviflora Dougl 
Stenosiphon linifolium (Nutt. I Britt 
Onosmodium molle Michx 
Lycopus americanus Muhl 
Mentha canadensis L 
Mimulus ringens L 
Lacinaria punctata (Hook.) Ktz . . 
Helianthus giganteus L. (Ohio) .... 
Coreopsis trip' er is L. (Ohio) 
Cardnus altissimus L 
Britton. 
Measured. 
3 ft. 
8 ft. 
3 
6 X 
4 
5 
IO 
12 K 
0 
'K 
3/2 
2^ 
2 % 
5 2/ 3 
4 
5E 
4 
7 
iE 
4 
5 
2 
na 
4 
173 
3 
5 
12 
5 
8 
2 
2^ 
2 
5 
2'A 
3 
3 
3 'A 
2 /4 
3 
12 
*3 
8 
9 
IO 
I I 
