. Bulletin. Forests and forestry -- United States. 6Q TIMBER. II RING-POROUS WOODS, [Some of Group D and cedar elm imperfectly ring-porous.] A. Pores in the summer wood minute, scattered singly or in groups, or in vdiort broken lines, the course of which is never radial. 1. Pith rays minute, scarcely distinct. a. Wood heavy and hard; pores in the summer wood not in clusters. a' Color of radial section not yellow (Nos. 39-44) Ash. b.' Color of radial section light yellow; by which,together with its hardness and weight, this species is easily (No. 103) Osage orange. b. Wood light an
. Bulletin. Forests and forestry -- United States. 6Q TIMBER. II RING-POROUS WOODS, [Some of Group D and cedar elm imperfectly ring-porous.] A. Pores in the summer wood minute, scattered singly or in groups, or in vdiort broken lines, the course of which is never radial. 1. Pith rays minute, scarcely distinct. a. Wood heavy and hard; pores in the summer wood not in clusters. a' Color of radial section not yellow (Nos. 39-44) Ash. b.' Color of radial section light yellow; by which,together with its hardness and weight, this species is easily (No. 103) Osage orange. b. Wood light and soft; pores in the summer wood in clusters of 10 to 30, (No. 56) Catalpa. 2. Pith rays very fine, yet distinct; pores in summer wood usually single or in short lines; color of heartwood reddish brown; of sapwood yellowish white; peculiar odor on fresh section (No. Ill) Sassafras. 3. Pith rays fine, but distinct. a. Very heavy and hard; heartwood yellowish brown. (No. 77) Black Locust. b. Heavy; medium hard to hard. a.' Pores in summer wood very minute, usually in small clusters of 3 to 8; heartwood light orange brown (No. 83) Red mulberry. b.' Pores in summer wood small to minute, usually isolated; heartwood cherry red (No. 61) Coffee tree. ADDITIONAL NOTES FOR DISTINCTIONS IN THE GROUP. Sassafras and mulberry may be confounded but for the greater weight and hard- ness and the absence of odor in the mulberry; the radial section of mulberry also shows the pith rays conspicuously. Honey locust, coffee tree, and black locust are also very similar in appearance. The honey locust stands out by the conspicuousness of the pith rays, especially on radial sections, on account of their height, while the black locust is distinguished by the extremely great weight and hardness, together with its darker brown Fig. 40.—"Wood of coffee tree. The ashes, elms, hickories, and oaks may, on casual observation, appear to resemble one another on account of the pronounced zone of por
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