No. 528] INHERITANCE IN PLANTS 741 



grains, and finally grains intermediate in size between 

 F 1 and each of the parents. "What will happen in F 3 

 can not be told until this season's crop has been studied. 



Height of Maize Stalks. — Tom Thumb pop corn is the 

 smallest variety of maize that has come to my notice and 

 is fully as early as any I have seen. Plants, as grown at 

 Lincoln in 1909 and 1910, averaged about 90 cm. in 

 height, and had on the average about eight nodes. In 

 1909 they ripened in seventy days from planting. • This 

 dwarf early race was crossed with a late dent corn ob- 

 tained from Missouri. The stalks of the latter are above 

 medium height for dent varieties grown in this section, 

 though in the dry seasons of 1909 and 1910 they have 

 reached an average height of only about 225 cm. The 

 average number of nodes is about nineteen. The plants 

 failed to ripen fully in 1909, owing to late planting, but 

 were within perhaps a week of full maturity at the time 

 of the first frost, 120 days after planting. The F 1 plants, 

 as grown in both 1909 and 1910, are as uniform in height 

 as either parent, with an average height of about 182 cm. 

 (about 25 cm. above mid-parental height) and an aver- 

 age number of nodes of about 12 (H nodes below the 

 mid-parent). In 1909 the Fj plants ripened in about 

 100 days from planting (practically the mid-parental 

 season). The F 2 plants (about 250 are now growing) 

 range in size from that of the Tom Thumb parent to 

 above that of the F x plants. No plant, however, is so 

 tall as the large dent parent. While records have not 

 as yet been made of heights, number of nodes and easi- 

 ness in case of all plants, there is apparently little corre- 

 lation between height and earliness. Some of the 

 earliest plants are above medium height and some of 

 the latest are very short. As to correlation between 

 number of nodes and height and between number of 

 nodes and earliness, nothing can now be said. 



Size and Shape of Summer Squashes. — A cross of 

 Yellow Crookneck and White Scallop has been grown, 

 and Fi and F 2 studied in small numbers. The fruit of 



