Cupressus L.

1. Cupressus L. View in CoL 1

Monoecious; trees (rarely shrubs). Twigs terete or 4-angled. Leaves opposite, decussate; scale-like, appressed and imbricate on adult plants; acicular and patent on young plants and rarely on leading shoots. Cones solitary, terminal on young twigs, ripening the second year, globose to ellipsoid-globose; cone-scales in 3-7 pairs, peltate, woody. Seeds flattened, 6-20 on each scale, narrowly winged.

In addition to the species described below, C. torulosa D. Don , Prodr. FI. Nepal. 155 (1825), has been planted for timber on a small scale in Italy. It has obtuse, appressed leaves and cones c. 12 mm in diameter, with 4-5 pairs of scales.

1 Leaves obtuse, closely appressed; cones green when young;

cone-scales 8-14

2 Leaves onlateraltwigs 0 -5 -1mm; staminateflowers4 -8mm;

ripe cone yellowish-grey 1. sempervirens 2 Leaves on lateral twigs 1-2 mm; staminate flowers 3-5 mm;

ripe cone brown 2. macrocarpa 1 Leaves acute to acuminate, free at the apex; cones glaucous when young; cone-scales 6-8

3 Leaves greyish when young, emitting a disagreeable odour when rubbed; cones up to 30 mm 4. arizonica 3 Leavesgreentoglaucous,not emittinga disagreeableodour;

cones 10-15 mm 3. lusitanica