The names given to the various lines of a tooth on a gear-wheel are as follows: In Figure 233, A is the face and B the flank of a tooth, while C is the point, and D the root of the tooth; E is the height or depth, and F the breadth. P P is the ... Read more of Drawing Gear Wheels at How to Draw.caInformational Site Network Informational
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Buds scaly; leaves evergreen and persistent for several years (except in

Larix), scattered along the twigs, spirally arranged or tufted,

linear, needle-shaped, or scale-like; sterile and fertile flowers

separate upon the same plant; stamens (subtended by scales) spirally

arranged upon a central axis, each bearing two pollen-sacs surmounted by

a broad-toothed connective; fertile flowers composed of spirally

arranged bracts or cover-scales, each bract subtending an ovuliferous

scale; cover-scale and ovuliferous scale attached at their bases;

cover-scale usually remaining small, ovuliferous scale enlarging,

especially after fertilization, gradually becoming woody or leathery and

bearing two ovules at its base; cones maturing (except in Pinus) the

first year; ovuliferous scales in fruit usually known as cone-scales;

seeds winged; roots mostly spreading horizontally at a short distance

below the surface.

Next: Cupressaceae

Previous: Pinoideae Pine Family Conifers

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