v21’s avatarv21’s Twitter Archive—№ 66,055

      1. are there plants where you can graft plant species A with plant species B, and you can graft plant species B with plant species C, but you can't graft plant species A with plant species C?
    1. …in reply to @v21
  1. …in reply to @v21
    and see also "ring species" en.m.wikipedia.org/wiki/Ring_species a lovely idea that softens our taxonomic understanding of species