Helianthella Castanea, or more commonly know as Mt. Diablo Helianthella, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) of the genus Helianthella. Its duration is perennial which means it will grow year after year. Helianthella Castanea or Mt. Diablo Helianthella's floral region is North America US Lower 48, specifically in the state of California.
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