The species may form dense leafless patches, less than an inch in height, on the surface of the ground (C. enysii), or large rounded masses 2in.—5in. high (C monroi), or bushy leafless shrubs 2ft.—6ft. high (C. australis, C. virgata), or leafy shrubs 8ft.—9ft. high, with elegant pendulous branches (C. odorata). The tallest species is said to attain the height of 14ft., but is restricted to Lord Howe's Island.* Some species have elegant whip-like shoots, while others are inelegant bushes, with numerous short irregular branches. The whole aspect of certain species is completely altered when growing in situations open to the attacks of sheep.
The branches may be flat, ¾ in. broad (C. williamsii), or almost filiform, terete or plano-convex, erect, distichous or spreading. Some species exhibit flattened branchlets at the beginning of the season, which become terete or plano-convex before the fruit reaches maturity; more slowly this characteristic is exhibited by many of the larger species, the branches of which almost invariably become terete with the development of the plant. The branchlets are usually striated
[Footnote] * C. exsul, F. Muell. The only species not found in New Zealand.
or grooved, and rigid, but rarely flexuous and twining amongst other shrubs; lastly, they may be pubescent or glabrous, while very slender and very robust branchlets may sometimes be developed on the same plant.