Flora of Australia Online
Callitris Vent., Decas 10 (1808); from the Greek kallos (beauty) and tris , of uncertain derivation, possibly a rendering of the Greek trichos (a hair) or treis (three), the latter presumably alluding to the trimerous phyllotaxis.
Type: Callitris rhomboidea R.Br. ex Rich.
Frenela Mirb., Mém. Mus. Hist. Nat. 13: 30 (1825). T: A nomenclatural synonym of Callitris , which has been lectotypified on Callitris rhomboidea R.Br. ex Rich., fide A.A.Bullock, Taxon 6: 227 (1957).
Octoclinis F.Muell., Trans. & Proc. Philos. Inst. Victoria 2: 21 (1858). T: O. macleayana F.Muell.
Monoecious trees or shrubs. Branches erect, spreading or fastigiate. Bark persistent, hard and compact (fibrous in C. macleayana ). Juvenile leaves acicular, triangular in cross-section, in whorls of 4, spreading, basally shortly decurrent. Adult leaves in alternating whorls of 3, decurrent for much of their length; free tip triangular in section and often appressed; dorsal surface rounded or keeled. Male cones terminal on short branches, solitary, paired or clustered, comprising numerous alternating, trimerous whorls of imbricate scales; each with 2–6 abaxial microsporangia; pollen spherical, not saccate. Female cones solitary or clustered on short lateral branches, comprising 2 whorls of 3 fertile scales with a reduced internode, to form a 6-merous cone (rarely 8 in species 12 & 14); outer whorl of scales often smaller than the inner; fertile scales each with 1–8 erect ovules and subtended by an adnate sterile bract which may form a dorsal protuberance. Mature cones persistent or deciduous. Seeds 1–8 per scale, 1–3-winged. 2n = 22 (7 species), P.N.Mehra & T.N.Koshoo, J. Genet. 54: 181–185 (1956).
A genus of 19 species; 17 endemic to Australia and two endemic to New Caledonia.
A number of the more abundant species have been and still are widely cut for their durable and insect-resistant timber.
R.T.Baker & H.G.Smith, A Research on the Pines of Australia (1910); J.Garden, A revision of the genus Callitris , Contr. New South Wales Natl Herb. 2: 363–392 (1957); J.Thompson, 5. Cupressaceae, Contr. New South Wales Natl Herb., Fl. Ser. 1–18: 46–55 (1961); J.Venning, Cupressaceae, in J.P.Jessop & H.R.Toelken (eds), Fl. S. Australia 1: 105–108 (1986); R.Adams & D.Simmonds, A chemosystematic study of Callitris (Cupressaceae) in south-eastern Australia, Austral. Forest Res. 17(2): 113–125 (1987).
Data derived from Flora of Australia Volume 48 (1998), a product of ABRS, ©Commonwealth of Australia