368 
LOCK : STUDIES IN PLANT BREEDING 
pods were small and narrow (about 13 mm. in width) and were 
truncated at the apical end. They were always fully inflated. The 
flowers were white. 
The seeds were from 4-5 to 8 mm. in greatest diameter; and 
6 5 mm. was the average length of 2,000 of them. They were nearly 
spherical and usually quite smooth (starch grains of the round type); 
the cotyledons were always of a bright and uniform orange-yellow 
colour. The testas were white and semi-transparent, but sometimes 
slightly tinged with green in the case of seeds which had dried off 
rapidly in the upper pods of a plant. 
B .—The Cross-bred Plants. 
1. —Native yea No. 1 x Telegraph* —In all 20 crosses were attemp¬ 
ted, of which 12 were successful and gave rise to 31 seeds. All closely 
resembled the seeds of No. 1 in every visible respect. Four of these 
crosses, which were made in January, 1903, resulted in the production 
of 5 seeds per pod (the normal average number for the maternal kind), 
but the others, which were made in November, 1902, gave relatively 
a very poor result. 
The latter seeds were sown in December, 1902. The plants which 
arose from them were about 5 feet in height and in their somewhat 
large foliage and stout habit approached the type of Telegraph. 
The pods were intermediate in general form, but with a truncated 
apex, and were from 15 to 18 mm. in width. 
2. —Telegraph x Native pea No. 1.—As the result of 30 pollinations 
17 pods were obtained containing altogether 50 seeds. In shape 
these closely resembled the normal seeds of Telegraph, but the colour 
of the cotyledons was in all cases bright yellow. The plants arising 
from these seeds, sown at the same time as those of the reciprocal 
cross, closely resembled the latter. Other seeds sown on May 2nd 
produced much taller plants. Some of the characters of the latter 
are indicated in the accompanying table, together with the cotyledon 
characters of their seeds, which belong of course to the next 
generation—F 2 . In size and shape, which appear to be maternal 
* Here and subsequently the seed-parent is placed first and the pollen 
parent second. X is thus to be read “ fertilized with pollen from.” 
