Phytanthrope, (noun) someone that identifies as a plant in a human body. A plant soul in a human body. Someone that was a plant in a past life and still identifies as such in some way. Someone who psychologically has a strong identification with a species of plant.  Plantkin is also an acceptable term that actually came into use earlier that phytanthrope around 2004 in a Livejournal community. 
Comes from “phyto-” meaning plant and “-anthrope” meaning meaning human.
It was a term I cobbled to together in in February 2013 for myself as a plant-identified person to use due to being tired of people saying otherkin are mythical creatures only even while plantkin being part of the otherkin community.  -DarahaghThe term wereplant was being used on AHWW in the early 1990's, and a few people were reported to have identified as plants back then.  In 2004 on the website Green Is More Than A Color the term “greenkin” was also used.  In 2006 the term “woodkin” was coined on another Livejournal community, unfortunately this profile has been purged. 
"A History of Plant-Identified People in the Otherkin Communities" - http://houseofchimeras.weebly.com/a-history-of-plant-identified-people-in-the-otherkin-communities.html
"What Being A Phytanthrope is To Me" - http://houseofchimeras.weebly.com/what-being-a-phytanthrope-is-to-me.html
Darahagh, "Plantkin/Phytanthrope" June 2, 2018, http://liongoatsnake.tumblr.com/post/174495825925/plantkinphytanthrope
Plantkin Information - Website - http://plantkin-info.org
Plantkinsuggestion - Tumblr - https://plantkinsuggestion.tumblr.com/
Greenkin (archived website) (accessed April 4, 2018) https://web.archive.org/web/20041027064549/http://qilora.com:80/GREEN/greenkin_faq.html
- ↑ Darahagh, House of Chimeras, "Kin to the Plants: Of People Who Identify As Plants", 05 April 2013. http://houseofchimeras.livejournal.com/128446.html
- ↑ Plant / Green ‘Kin. August 4th 2004, http://plant-otherkin.livejournal.com/profile[accessed June 2 2018].
- ↑ Phytanthropy, April 23, 2014 http://liongoatsnake.tumblr.com/post/83649310749/phytanthropy
- ↑ “Stupid Question,” alt.horror.werewolves, February 20, 1995, https://groups.google.com/forum/?fromgroups#!topic/alt.horror.werewolves/ZEDpEzhCDjA [accessed June 2, 2018].
- ↑ “Green is more than a color?,” Qilora.com,http://web.archive.org/web/20060207123401/http://greenkin.qilora.com/ [accessed June 2 2018].
- ↑ Woodkin, June 15 2006, http://woodkin.livejournal.com/profile [accessed June 2 2018].