Feb. 21 ,1924 Teosinte Maize Hybrids 541 
8. Length of central spike. —The length in centimeters of the termi¬ 
nal spike of the staminate inflorescence of the main culm. In teosinte 
this measurement is about 8 cm., in crinkly maize 12 cm., in ramose maize 
5 cm., and in brachytic maize 30 cm. 
9. Length of longest tassel branch. —The length in centimeters of 
the longest branch of the terminal inflorescence of the main culm. In 
teosinte this measurement is about 10 cm., in crinkly maize 9 cm., in 
ramose maize 20 cm., and in brachytic maize 25 cm. 
10. Length of glume. —Length of the outer glume in millimeters. 
The spikelet for this measurement was chosen from about the middle of 
the central spike. The glumes of teosinte are from 10 to 11 mm. in 
length; of crinkly maize 7 to 8 mm. 
11 . Number of tassel branches. —The number of branches, primary, 
secondary, tertiary, and upward, of the terminal staminate inflorescence 
of the main culm. In teosinte this is usually 23, in crinkly maize 17, in 
ramose maize 133, and in brachytic maize 36. 
12. Rows in central spike. —The number of rows of alicoles on the 
central spike of the terminal inflorescence of the main culm. In teosinte 
there are invariably two rows of alicoles, while in maize the number is 
four or more. 
13. Length of leaf. —Length in decimeters of the longest leaf pro¬ 
duced on the main culm. In teosinte this is about 12, in crinkly maize 
5, in ramose and brachytic maize about 9. 
14. Width of leaf. —Width in centimeters of the longest leaf. The 
leaves of teosinte are between 6 and 7 cm. wide, of crinkly about 13 cm., 
of ramose and brachytic about 10 cm. 
15. Width index.— The width of the longest leaf in centimeters 
divided by the length in decimeters and multiplied by 10. The leaves 
of teosinte are more than 10 times as long as broad, of crinkly about 3 
times, and of ramose and brachytic 9 or 10 times. 
16. Length of sheath. —Length in centimeters of the sheath of the 
longest leaf. The sheaths of teosinte are about three times as long as 
those of crinkly maize. 
17. Position of longest leaf. —The number of leaves above the 
longest leaf of the main culm. In teosinte there are about 15 leaves above 
the longest, in maize 8 or 9. 
18. Leaves above best inflorescence. —The number of leaves above 
the best inflorescence of the main culm. In these hybrids the entire 
branch is considered as the inflorescence. In maize this number would 
be the same as the “Leaves above,’’ but in the second generation plants 
the uppermost inflorescence often is not the best, and in teosinte there 
usually are three leaves above the best branch. 
19. Leaves on best inflorescence. —The number of leaves borne on 
the best inflorescence. The number of leaves forms a convenient way 
to count the number of nodes. The best branch of teosinte usually has 
3 nodes, while the ear of maize is borne on a branch with 10 or more nodes. 
20. Length of best inflorescence. —Length in centimeters of the 
best inflorescence produced on the main culm. The ear and ear stalk 
of maize are about one-fourth the length of the best branch of teosinte. 
21. Length of ear stalk of best inflorescence. —The length in 
centimeters of the stalk of the best inflorescence. The length of the ear 
stalk of maize is about one-tenth that of the stalk of the best branch of 
teosinte. 
