Unlike other two block tall flower plants, pitcher plants don't craft into two dyes.

Steps to Reproduce:

• Get a pitcher plant and another two tall flower (e.g. sunflower)
• Put other two tall flower into crafting grid
  • Crafts two dyes
• Put pitcher plant into crafting grid
  • Observed: only crafts one dye
  • Expected: would craft two dyes like other double flowers