268 
AMERICAN JOURNAL OF BOTANY 
[Vol. 9 
gives a summary of those seeds which germinated, with the number of 
individuals in each case and the percentage of germinations. 
Table i 
Name of Plant Number of Percentage of 
Individuals Germination 
Brassica nigra 9 18 
Oenothera biennis . . 19 38 
Rumex crispus 9 18 
Portulaca oleracea i 2 
Plantago major 5 10 
A maranthus retroflexus i 2 
Amaranthus graecizans 33 66 
Lepidium virginicum i 2 
Ambrosia elatior 2 4 
{Chenopodium album) 2 
Table 2 
Name of Species 
5th 
loth 
15th 
20th 
25th 
30th 
35th 
40th 
Tested 
Yr. 
Yr. 
Yr. 
Yr. 
Yr. 
Yr. 
Yr. 
Yr. 
Amaranthus retroflexus 
+ 
+ 
+ 
+ 
+ 
+ 
0 
+ 
0 
0 
0 
0 
0 
0 
0 
+ 
0 
+ 
+ 
+ 
+ 
+ 
+ 
4- 
0 
0 
0 
0 
0 
0 
0 
0 
Bursa bursa-pastoris 
+ 
0 
+ 
+ 
+ 
+ 
+ 
0 
Erechtites hieracifolia 
0 
0 
0 
0 
0 
0 
0 
0 
Euphorbia maculata 
0 
0 
0 
0 
0 
0 
0 
0 
Lepidium virginicum 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
Lychnis githago 
Anthemis cotula 
0 
0 
0 
0 
0 
0 
0 
0 
+ 
+ 
+ . 
0 
+ 
0 
? 
0 
Malva rotundifolia 
+ 
0 
0 
+ 
0 
0 
0 
0 
Oenothera biennis 
+ 
+ 
+ 
+ 
+ 
+ 
0 
+ 
Plantago major 
0 
0 
+ 
0 
0 
0 
0 
Polygonum hydropiper 
0 
+ 
+ 
+ 
+ 
possibly 
0 
0 
Portulaca oleracea 
0 
+ 
+ 
+ 
+ 
0 
0 
+ 
Rumex crispus 
+ 
? 
+ 
+ 
+ 
+ 
+ 
+ 
Chaetochloa lutescens 
+ 
+ 
+ 
0 
+ 
+ 
0 
0 
+ 
+ 
+ 
+ 
+ 
+ 
0 
0 
Trifolium repens 
0 
0 
0 
0 
0 
0 
0 
0 
Verbascum thapsus 
+ 
? 
+ 
+ 
0 
0 
+ 
0 
{Amaranthus graecizans) 
t 
{Chenopodium album) 
The total number of seedlings from one thousand seeds was eighty-two. 
The total percentage of germination was, therefore, at least 8.2 percent. 
It might be reasonably supposed that the real percentage of germination 
was even higher than this. Table 2 shows the results for forty years. 
From this it appears that Lepidium is the only species which has an un- 
broken record for every observation. From this latest test, Amaranthus 
certainly makes the best showing, with Oenothera second and Brassica 
nigra and Rumex crispus third. The facts that Ambrosia elatior had never 
been made to germinate before, and that Plantago major had germinated 
