valerian References valerian biochemistry Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Dipsacales/ Valeriana cladeIts dried rhizome yields valerian, a natural sedative. Spikenard (Nardostachys grandiflora) is a perennial herb of the Himalayas that produces an essential oil in its woody rhizomes. Read MoreIts dried rhizome yields valerian, a natural sedative. Spikenard (Nardostachys grandiflora) is a perennial herb of the Himalayas that produces an essential oil in its woody rhizomes. Read More