1915] ROSE—DELAYED GERMINATION 437 
shown by Atwoop. But referring to the table again, it will be 
seen that one sample, no. 5302, deteriorated in vigor as it grew 
older, since it gave a percentage of 27 when first tested and 11 per 
cent less 6 months afterward. Considering the results as a whole, 
it is clear that frosted oats are unreliable in performance and of 
very doubtful value for seeding purposes. 
Another crop which sometimes suffers from frost is garden 
peas. Within the last two or three years the growing of garden 
peas for seed has become an important industry in Idaho and 
Montana. It has been found that certain of the late varieties 
grown there are injured by frost and the viability of the seed 
seriously impaired. 
A study of 14 samples of such peas has shown that decrease in 
germination is probably due to two different causes, both of which, 
however, may be the effect of frost. 
1. Actual injury to the embryo, especially the tip of the radicle. 
It has a whitish shriveled appearance and starts to grow very 
slowly, if at all. 
TABLE VIII 
GERMINATION OF PEAS 
Variety ear ga | — mae off; 
Reena Gee ee eo cae ures go 82 86 
Not $ Excelsior WEITER ee ics ele 68 Ele a>, | Pe hea ont. 
Ff oot | ee ae Pal em RE Span cea Nate 98 100 [eg eae eves 
Telephone 88 sie Hoe aan oe OR ie ae 58 46 55 
radus ee 3 Shae Ti pee cea? ee Hn 44 36 58 
er OR dc Pe, ee ee a Oe a et ae j 70 
Dwarf Deitance 8 ne pete lang cies cae ee | 52 
le SP be re eve cere fe | Oe OA Lee eas _ 
WIAEE ees GS para Bin 78 Sy Eis aee ad ¥ 
Alderman 9 g12S.. 74H der oan kane oe ae ON i eee aa ee 
5 a a ek Be i a 96 
ns as OA ee tS Bas wt Pega oe. 
Ce I rs ot nts wate ere ae 78 Re ae a 92 
ig dome 685 BOR eo Nee. eis a | ts SOAS Ga epee emerge ' 50 
Sucuiis ww © Uta Wu reew cca S Saini 67 
2. The presence of fungi on or in the seed coat. That this 
actually decreases germination was shown by the work summar- 
ized in table VIII. With the coats on, the seeds of all the samples 
here reported on showed much fungus infection; with coats off, 
