haulm vs phyllode

haulm

noun
  • An individual plant stem. 

  • The stems of various cultivated plants, left after harvesting the crop, which are used as animal food or litter, or for thatching. 

  • Part of a harness; a hame. 

phyllode

noun
  • A flattened petiole or leaf rachis that resembles and functions as a leaf, and may or may not be combined with an actual lamina. 

How often have the words haulm and phyllode occurred in a corpus of books? (source: Google Ngram Viewer )