Galium johnstonii is a perennial herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 4.3 (limited distribution).
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2024. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 11/21/2024).