| To Codes in: | A | B | C | D | E | F | G | H | I | K | L | M | N | O | P | R | S | T | U | V | W | Z |
| ZEMA | Zea mays | corn |
| ZEMAM2 | Zea mays ssp. mays | corn |
| ZEA | Zea sp. | corn |
| ZIAQ | Zizania aquatica | annual wildrice |
| ZIAQA2 | Zizania aquatica var. aquatica | annual wildrice |
| ZIPA3 | Zizania palustris | northern wildrice |
| ZIPAI | Zizania palustris var. interior | northern wildrice |
| ZIZAN | Zizania sp. | wildrice |
| ZITE | Zizania texana | Texas wildrice |
| ZIMI | Zizaniopsis miliacea | giant cutgrass |
| ZIZAN2 | Zizaniopsis sp. | cutgrass |