1918] GERICKE—SOLANUM 353 
4. The no-rest period tubers, when planted, produced one- 
stalked plants, indicating the germination and growth of one bud. 
5. Plants grown from the no-rest period tubers had a longer 
growing period than did plants grown from the normal rest period 
tubers. 
6. Most of the seed tubers of the no-rest series plants were 
recovered. These potatoes had lost very little in weight. When 
these tubers were planted the second time, germination and growth 
of several buds ensued. The plants appeared above ground in 
about the same time period required for the plants of the normal 
rest period tubers. The growing period of the no-rest period plants 
in the second planting was nearly equal to that of their first 
planting. 
UNIVERSITY OF CALIFORNIA 
LITERATURE CITED 
1. APPLEMAN, : si Study of rest period in potato tubers. Md. Exp. Sta. 
Bull. 183. 19 
- CROCKER, W. we of seed coats in delayed germination. Bor. Gaz. 42: 
265-201. 
3- oie S. H., A physiological and cheese) study of after-ripening. 
Bor. Gaz. 55: 486s. 1913. 
4. Howarp, W. L., An sotiiet tines study of the rest period in plants. Mo. 
Exp. Sta. Res. Bull. x. 
- JOHANNSEN, W., Das Aaswehiccs beim Friihtreiben. 2 Auflage Jena. 
N 
un 
> 
Kress, GeorG, Entwickelungsinderungen bei Pflanzen. Jena. 1903. 
Miiller-Thurgau, H., and ScHNEIDER-ORELLI, O., Kenntnis der Leben- 
vorgange in ruhenden Pflanzenteile. Flora 101: 309-372- 1910. 
ro 
