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204 
a. Numerous fine vanae concentric lines nearly as distinct as the pith rays 
appear in the summer wood; pores often with a wall lighter colored than 
the NE tissue; wood heavy and hard....... Hickory. (Hicoria.) 
b. Wood not completely cd dull teni ia er ces o Mine uen К-Ы E 10. 
a. Pores in summer wo эне very small, appearing as radial branching lines or 
Spots, often discs pith rays very fine, usually visible only with the 
BUDE |. uuu а SQ. у Chestnut. (Castanea dentata.) 
b. Pores in summer wood appearing as spots or as short broken lines, not 
vcl qul nazi occu MC M NEM t ML тт. 
а. 
gi 
Wood when wet has a characteristic odor and taste; wood 1 
lippery Elm. yp: m fre) 
P ve eC ORtely dein d у Су: у RD PLI v уук гу; 
> 
b. 
a. 
b. 
а. 
а. 
b. 
a. 
- Wood not completely as in 
- Wood whitish; large pores in spring wood solent дез few, usually oc- 
ing. 
- Wood red; pores in summer wood not arranged in lines, usually separate. 
Coffee Tree. (Gymnocladus dioica.) 
7 hoi e not оет АПИ Dru M арна Lt 
Woo 
light; pores in spring wood large and numerous, usually 
three or more rows, sometimes filled; pores in summer wood often 
E ORT 5G has УГУЛДЫ УУ dE IN Catalpa. (Catalpa TR 
SO ee ee aa AUR E M Wow AIRE bore 9 R6 ааа 
cupying not more than one third of the г 
White Ash. (Fraxinus americana.) 
Wood brownish; large pores in spring wood comparatively numerous, often 
cupying one half of the ring........ Black Ash. (Fraxinus nigra.) 
Pores usually visible without Мн generally scattered through the ring 
but more numerous and larger in the sp ring wood, gradually varying to 
smaller o Сон NEE WO аео LLL iN 16. 
All pores а or minute, rather evenly distributed, usually visible ics 
with magnifier 
Pith rays comparatively broad, the largest often twice as broad as the diis 
pores; pores often arranged in radial uad or мба 
е Оак. (uroo virginiana.) 
Wood dark chocolate brown....... ..Black Walnut. (Juglans nigra. ) 
Wood not d. n" chocolate iint кай, light brown to whitish; fine strai ге 
Wood congetétively oe dens dec siis pores with a wall lighter des 
than the surrounding tissue.................. .Hickory. (Hicoria.) 
Wood comparatively Me gm pores not as in a. 
Butternut. (Juglans cinerea.) ` 
Cells of different sizes, not arranged in lar compact radial rows as seen 
in thin cross section, sometimes vidas without magnifier; pith rays 
often visible even without magnifier; growth rings sometimes indistinct. 
20. 
All cells of uniform size arranged in regular radial rows or tiers as seen in a 
thin cross section; pith rays very fine; growth rings always distinct, the 
summer wood often much harder than the spring wood.......... .34- 
790 reddish-brown, streaked with irregular darker colored streaks or Mais 
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