You're right. These, despite being chitinous photosynthesizers that seemingly use green photosynthetic pigment, like many crystalflora (e.g., Grovecrystal descendants), have no relation to the Binucleus Crystal Shrub. That's surprising. The Solumcrusta, ancestor of the Chitjorn itself, descends directly from Protosagania.
It appears a general category name for Chitjorn descendants ("Jornflora") was only made in July 2020, judging by the editing history of a somewhat hard-to-find wiki page.
This post has been edited by Coolsteph: Apr 1 2021, 03:21 PM