CUPRESSACEAE

XXVIII. CUPRESSACEAE View in CoL 1

Monoecious or dioecious; resiniferous trees or shrubs with opposite or whorled, usually scale-like, leaves. Flowers (cones) made up of opposite or whorled scales. Scales of male cones (microsporophylls) bearing 3-5 pollen-sacs on the lower surface. Scales of female cones (megasporophylls) bearing 2-many erect

ovules on the upper surface, and completely adnate to the subtending bract. Fruit a ± woody cone, or rarely the scales becoming fleshy and the fruit berry-like, indéhiscent. Seeds winged or not.

1 Fruit indéhiscent, berry-like, with fleshy, coalescent scales

5. Juniperus 1 Fruit a dehiscent cone with ± woody scales

2 Cone-scales 4, in a single whorl 4. Tetraclinis

2 Cone-scales in3 -8pairs

3 Ripe cone-scales flat, oblong, imbricate 3. Thuja

3 Ripe cone-scales peltate, valvate

4 Twigs terete or 4-angled; seeds narrowly winged, 6-20 on each scale 1. Cupressus

4 Twigs flattened; seeds broadly winged, up to 5 on each scale 2. Chamaecyparis