I think no major statistics needed as most of the survey work . different measures of central tendency, chi square or t test will do. any co relation and regression can also be done. All social science statistics tool also applies in ethnobotany in general.

also see earlier answers in RG

Article Quantitative Ethnobotany

https://pdfs.semanticscholar.org/2628/b72422523a7c4d5f6c32d8638864138476de.pdf

http://shodhganga.inflibnet.ac.in/bitstream/10603/46458/14/14_chapter2.pdf

No major statistical tests needed but depending on the information you intend to relay, there are several ethnobotanical indicies that could be used e.g. Informant consensus Factor, Fidelity levels, Use values and preference ranking. Otherwise descriptive statistics can be used to present any information acquired through ethnobotanical studies

Informant consensus factor,Use value,Family use value,Fidelity level,Relative popularity level,Relative importance,Informant diversity and equitablity value..and so on...These are very simple exercises and you can easily attempt...