Feb., 1912.] Plants Recognized on a Bumping Ground. 
475 
movement the lowering of the temperature, the decrease of light, 
or the fatigue of the protoplasm? These problems are for the 
plant physiologist. But anyone will find the habits interesting 
in themselves. They show that there is a real plant behavior as 
well as an animal behavior and by taking an evening ramble 
before and after sunset the fact will become evident that many 
plants change their positions with the coming of the night even as 
do most of the animals. 
PLANTS RECOGNIZED ON A DUMPING GROUND AT THE 
FOOT OF NINTH STREET, CLEVELAND, OHIO. 
Edo Claassen. 
It was during the month of June that I visited this locality. 
Being quite surprised by the great number of different plants I 
saw growing there, I resolved to make a close inspection of a 
part (about 40 acres) of this tract of land in the course of several 
weeks. The result is contained in the following list, which is 
arranged in conformitv with “Britton and Brown’s Flora.” 
Mosses. 
Funaria hygrometrica, L. 
Bryum argenteum, L. 
Lcptodon pirit'orme, Hampe. 
Gramineae, Juss. 
Agrostis alba, L. 
Avena sativa, L. 
Cenchrus tribuloides, L. 
Eragrostis eragrostis, (L.) Karst. 
Eragrostis pilosa, (L.) Beauv. 
Festuca elatior, L. 
Hordeum vulgare, L. 
Ixophorus glaucus, (L. ) , Nash. 
Panicum capillare, L. 
Panicum crus galli, L. 
Panicum proliferum, Lam. 
Panicum virgatum, L. 
Phleum pratense, L. 
Poa annua, L. 
Poa compressa, (L.) Beauv. 
Poa pratensis, L. 
Syntherisma sanguinale, (L.) Nash. 
Triticum vulgare, L. 
Zea Mays, L. 
Juncaceae, Vent. 
Juncus bufonius, L. 
Salicaceae, Lindt. 
Populus alba, L. 
Salix nigra, Marsh. 
Polygonaceae, Lindt. 
Polygonum aviculare, L. 
Polygonum cilinode, Michx. 
Polygonum erectum, L. 
Polygonum lapathifolium, L. 
Polygonum persicaria, L. 
Rumex acetosella, L. 
Rumex altissimus, L. 
Rumex crispus, L. 
Rumex obtusifolius, L. 
Chenopodiaceae, Dumort. 
Atriplex hastata, L. 
Chenopodium album, L. 
Chenopodium ambrosioides, L. 
Kochia scoparia, (L.) Roth. 
Salsola Tragus, L. 
Amaranthaceae , J. St. Hit. 
Amaranthus graecizans, L. 
Amaranthus retroflexus, L. 
Aizoaceae, A. Br. 
Mollugo verticillata, L. 
Cruciferae, B. Juss. 
Lepidium Virginianum, L. 
Sisymbrium altissimum, L. 
Sisymbrium officinale, (L.) Scop. 
Rosaceae, B. Juss. 
Potentilla Monspeliensis, L. 
Drupaceae, DC. 
Amygdalus persica, L. 
