=Fibre-saturation point.= The amount of moisture wood will imbibe, usually 25 to 30 per cent of its dry-wood weight. =Figure.= The broad and deep medullary rays as in oak showing when the timber is cut into boards. =Filament.= The stalk which supports the anther. =Fine-grained.= Wood is fine-grained when the annual rings are close together or narrow. =Germination.= The sprouting of a seed. =Girdling.= To make a groove around and through the bark of a tree, thus killing it. =Glands.= A secreting surface or structure; a protuberance having the appearance of such an organ. =Glaucous.= Covered or whitened with a bloom. =Grain.= Direction or arrangement of the fibres in wood. =Grubs.= The larvae of wood-destroying insects. =Gymnosperms.= Plants bearing naked seeds; without an ovary. =Habitat.= The geographical range of a plant. =Heartwood.= The central portion of tree. =Hollow-horning.= Internal checking. =Honeycombing.= Internal checking. =Hot-blast kiln.= A drying arrangement in which the air is blown through heating coils into the drying room. =Humidity.= Damp, moist. =Hygroscopicity.= The property of readily imbibing moisture from the atmosphere. =Indefinite.= Applied to petals or other organs when too numerous to be conveniently counted. =Indigenous.= Native to the country. =Involute.= A form of vernation in which the leaf is rolled inward from its edges. =Kiln-drying.= Drying or seasoning of wood by artificial heat in an inclosed room. =Leaflet.= A single division of a compound leaf. =Limb.= The spreading portion of the tree. =Lumen.= Internal space in the spring- and summer-wood fibres. =Median.= Situated in the middle. =Medulla.= The pith. =Medullary rays.= Rays of fundamental tissue which connect the pith with the bark. =Membranous.= Thin and rather soft, more or less translucent. =Midrib.= The central or main rib of a leaf. =Moist-air kiln.= A drying arrangement in which the heat is taken from radiating coils located inside the drying room. =Mottle.= Figure transverse of the fibres, probably caused by the action of wind upon the tree. =Non-porous.= Without pores. =Oblong.= Considerably longer than broad, with flowing outline. =Obtuse.= Blunt, rounded. =Oval.= Broadly elliptical. =Ovary.= The part of the pistil that contains the ovules. =Parted.= Cleft nearly, but not quite to the base or midrib. =Parenchyma.= Short cells constituting the pith and pulp of the tree. =Pericarp.= The walls of the ripened ovary, the part of the fruit that encloses the seeds. =Permeable.= Capable of being penetrated. =Petal.= One of the leaves of the corolla. =Pinholes.= Small holes in the wood caused by worms or insects. =Pistil.= The modified leaf or leaves which bear the ovules; usually consisting of ovary, style and stigma. =Plastic.= Elastic, easily bent. =Pocket kilns.= Small drying rooms with openings on one end only and in which the material to be dried is piled directly on the floor.