9. Callitris Ventenat, Dec. Gen. Nov. 10. 1808.
Cypress-pine [Greek callos, beautiful, and treis, three, referring to the beauty of the plants and the three-whorled leaves and cone scales]
Richard P. Wunderlin
Shrubs or trees evergreen. Branchlets angled or furrowed-cylindrical, variously oriented. Leaves in whorls of 3--5. Adult leaves scalelike, appressed, abaxial surface keeled or rounded, free portion to 1 mm, abaxial glands absent. Pollen cones solitary or in small clusters, with 4--15 whorls of sporophylls, each with 2--4 pollen sacs. Seed cones maturing in 1--2 years, of 1--2 sizes, often remaining unopened for many years, ovoid or globose, 1--3.5 cm; scales persistent, in 2 equally inserted whorls of 3(--4), valvate, rhombic-deltate, basifixed, thick and woody. Seeds 2--9 per scale, round or 3-angled, broadly 1--3-winged; cotyledons 2.
Species 16 (1 naturalized in the flora): North America, Australia, and New Caledonia.
SELECTED REFERENCES
Blake, S. T. 1959. New or noteworthy plants, chiefly from Queensland, l. Proc. Roy. Soc. Queensland. 70(6): 33--46. Garden, J. 1957. A revision of the genus Callitris Vent. Contr. New South Wales Natl. Herb. 2(5): 363--392. Thompson, J. 1961. Cupressaceae. Contr. New South Wales Natl. Herb., Fl. Ser. 1/18: 46--55. Thompson, J. and L. A. S. Johnson. 1986. Callitris glaucophylla, Australia's 'white cypress pine'---A new name for an old species. Telopea 2: 731--736.
