phyllode vs seta

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. 

seta

noun
  • The stalk of a moss sporangium, or occasionally in a liverwort. 

  • A bristle or hair 

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