alicyclobacillus herbarius alicyclobacillus herbarius alicyclobacillus herbarius is a species of gram positive, strictly aerobic, bacterium. the bacteria are acidophilic and produced endospores. it was first isolated from a hibiscus-based herbal tea. the species was first described in 2002, and the name refers to the herbal tea from which it was first isolated. alicyclobacillus herbarius scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: alicyclobacillaceae genus: alicyclobacillus species: a. herbarius binomial name alicyclobacillus herbariusgoto et al. 2002 the optimum growth temperature for a. herbarius is 55-60 °c, and can grow in the 35-65 °c range. the optimum ph is 4.5-5.0, and can grow in ph 3.5-6.0.