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Rh I. Ultimate branchlets on mature trees tetragonal, bearing leaves all alike and uniform in size.


 * 1. Libocedrus tetragona, Endlicher. Chile, Patagonia.
 * Leaves spreading.
 * 2. Libocedrus Bidwith, Hooker. New Zealand.
 * Leaves closely appressed.

II. Ultimate branchlets flattened, with leaves of two kinds ; lateral boat-shaped, median flat and appressed.

A. Median and lateral leaves equal in length.


 * 3. Libocedrus decurrens, Torrey. Oregon, California, W. Nevada.
 * Leaves green on both surfaces.
 * 4. Libocedrus macrolepis, Bentham et Hooker. China, Formosa.
 * Leaves glaucous on the lower surface, with white stomatic bands.

B. Lateral leaves much longer than the median leaves.


 * 5. Libocedrus chilensis, Endlicher. Chile.
 * Median leaves minute, rounded at the’apex, with a conspicuous gland.
 * 6. Libocedrus Doniana, Endlicher. New Zealand.
 * Median leaves ovate, acute, mucronate, scarcely glandular.

The two following species, imperfectly known and not introduced, will only be mentioned here. They belong to the last section :—
 * 7. Lebocedrus papuana, F.v. Mueller.” New Guinea.
 * 8. Libocedrus austro-caledonica, Brongniart et Gris.2 New Caledonia.

A tree® attaining in South America, though rarely, a height of 160 feet. Branchlets tetragonal. Leaves equal in size and uniform in shape in the four ranks ; those on the ultimate branchlets about $1/12$ inch long, adnate only at the base, the remaining part free and spreading ; ovate, acute, or rounded at the apex, keeled on the back, concave and glaucescent above; those on primary axes larger, adnate for the most of their length, the apices only being free and spreading.

Cones on long branchlets, less than $1/2$ inch long, brown. Scales four, minutely

1 Trans. Roy. Soc. Victoria, i, 32 (1889).

2 Bull. Soc. Bot. France, xviii. 140 (1871).

3 This tree has been confused by travellers with Fitzroya patagonica, which has very similar foliage when old. In the former, the leaves gradually taper to a rounded or acute apex; in the latter they are broadest in their upper third, close to the rounded apex. The cones are entirely different.