Callitris verrucosa, R. Br.1) (Frenela verrucosa, A. Cunn.), known as cypress or turpentine pine, occurs principally in New South Wales, but is also found in the interior of Australia and in West Australia.
The oil from the leaves (distilled in September with a yield of 0,331 p. c, in December with a yield of 0,266 p. c.) possessed the following constants: d23o0,8591 and 0,8596; aD + 44,2° and 47,5°; nD19o1,4809 and nD20o1,4809; S.V. 8,93 and 10,87; E. V. after acetylation 21,27; insoluble in 10 vols, of 90 p.c. alcohol.
After careful fractionation the following constituents were found: d-a-pinene (m.p. of nitrolbenzylamine 122 to 123°), d- and /-limonene and dipentene. The limonene and dipentene tetra-bromides were obtained from fraction 170 to 180° (d23o 0,8624; aD + 51,7°). In addition the oil contains small amounts of geranyl and bornyl acetates, also traces of free borneol, likewise the same sesquiterpene which was found in the oil of Callitris robusta.
According to Th. A. Henry2) the volatile oil of Australian sandarac resin from Callitris verrucosa contains d-a-pinene.