Igt5] ROSE—DELAY ED GERMINATION 443 
5. Certain late varieties of western-grown garden peas germi- 
nate poorly. This is shown to be due to one or both of two causes: 
(a) actual frost injury to the embryo; (b) the presence of fungi 
on or in the seed coat or inside of it. 
6. Seeds of 51.4 per cent of all species and varieties examined 
showed fungi on the seed coat within two days after being put to 
germinate. 
The writer is indebted to Dr. Wm1t1aM Crocker for many 
suggestions and criticisms. 
UNIVERSITY oF CHICAGO 
LITERATURE CITED 
1. AppeL, O., Uber die Stellung der Pathologie bei der Samenkontrolle und 
den Anbauversuchen. Jahresb. Ver. Angew. Bot. 4:201~210. IgI1 
RG, A., Ein haufiger Fehler bei Keimkraft Priifungen. Landw. 
Vers. yah 60:427-432. 1904. 
- Bottey, H. L., The agricultural value of hard seeds in alfalfa and clover 
) 
> 
‘az 
‘a! 
3 
seeds. Paper ail before the Association of Seed Analysts 1910; cited, 
by Love and Lercury. 
4. , Work of the pure seed laboratory. North Dakota Exp. Sta. 
Rept. 41-80. 1gi2. 
5. Brown, Epcar, The germination of packeted vegetable seeds. U.S. 
Dept. Agric., Bur. Pl. Ind. Circ. 101. pp. 9. 191 
6. Bruynine, J. F., On the use of hot water for forcing germination in hard- 
coated seeds. Jour. Landw. 14:86. 1893; cited by JARZYMOWSKI. 
CARRUTHERS, W., On vitality of farm seeds. Jour. Roy. Agric. Soc. Eng. 
72: 168-183. 
9. CLEMENS, hae zur forstlichen Samenkunde. II. Einfluss  tiefer 
Tecipetstucen, unter gleichzeitigem Luftabschluss, auf die Erhaltung der 
Keimfihigkeit. Naturw.Zeitschr. Forst. u. Landw. IX. 9:402-409. rgrt. 
KE , A physiological and chemical study of after- 
7 
Leal 
° 
& 
fe) 
= 
n 
S 
s 
S 
= 
23) 
ripening. Bor. Gaz. a s:ah6-ans. 1913 
11. GLOCKENTOEGER, M., Uber eine Quelle grober Fehler bei den Keim- 
kraftpriifungen der eee men. Landw. Vers. Stat. 49:219-222. 1897. 
12. Haack, Die Priifung des a chaue Zeitschr. Forst. u. Jagdw. 
44° 103-222, 273-307. 1912 
- Hittner, L., Die Kcimnnesvethiltnine der Leguminosen und ihre Beein- 
fliissung dace Organismenwirkung. Arbeiten Biol. Abt. f. Land. u. 
Forstw. 3:30. 1902. 
el 
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