Acorn. The fruit of an oak. 



Acuminate. Taper-pointed or long-pointed, (e. g. leaves of Willow.) 



Acute. Pointed, (e. g. leaves of Cork Elm.) 



Albumen. Food stored up in seed with embryo; endosperm. 



Alternate leaves. A single leaf at a node; not opposite, (e. g: Willow.) 



Annual. Yearly; a plant which reaches maturity and dies at the end 

 of a single season, (e. g. Pea, Wheat.) 



Annual rina. The layer of wood formed each year. (Page 7.) 



Anther. The pollen-containing sac; enlarged part of stamen. 



Apetalous. Without corolla, (e. g. Soft Maple. Oak.) 



Arboreous. Tree-like. 



Assimilation. In plants, the production of organic matter from in- 

 organic matter. 



Axil. The angle formed by the junction of the leaf-blade, bract, 

 petiole, pedicle or peduncle, with the branch or stalk from 

 which it springs. 



Sack-firing. The burning under control of material in front of a fire 

 to prevent its spreading. 



Bark. A general term applied to all the tissues outside of the wood 

 proper. (Fig. 1.) 



Basal. Attached to the base. 



Bast. The woody fibrous tissue of the inner bark. (Page 279.) 



Berry. Botanically a fleshy fruit, (e. g. Grape, Currant.) Com- 

 monly applied to many kinds of fruits, (e. g. Strawberry, 

 Mulberry.) 



Blade of a leaf. The expanded portion; the wings. 



Blight. The dying without apparent cause of the tenderer parts of 

 plants. 



B. M., Abbreviation for board measure, (q. v.) 



Board-foot. The unit of board-measure; equivalent to a board 12 in. 

 x 12 in. x 1 in. One cubic foot is considered as equivalent to 

 ten board feet, allowing for waste in working. 



Board-measure. (B. M.) The system used by lumbermen in which 

 the board-foot (q. v.) is the unit. 



