TABLE 4.
Ear and ear branch characters
| Cytotypea
|
|||
|---|---|---|---|
| Character | Z. mays | Z. luxurians | Z. diploperennis, Z. perennis |
| Ear branch angleb,c | Small (∼5°–10°) | Large (∼15°–20°) | Large (∼15°–20°) |
| Branch length | Short | Long | Long |
| Ears per branch | One | One or more | One |
| External ear shapeb,c | Bullet | Cylindrical | Conical |
| Silk productionb | Normal | Normal | Reduced |
| Husk/silk packingb,c | Intermediate | Loose | Tight |
| Husk blade lengthc | Intermediate | Very long | Short |
a
Z. mays: A619, cytotypes 1–7; Z. luxurians: cytotypes 8–10; Z. diploperennis, Z. perennis: cytotypes 12–15; Z. luxurians cytotype 11 and Z. perennis cytotype 16 had Z. mays morphology.
b
Not quantified.
c
See Figure 7.