205 
pores and pith rays very small often indistinct even with the magnifier; 
growth rings often inconspicuous. 
8 um, Red Gum. (Liquidambar — ) 
теа nain S уз... .:....., sx ERR EE Ee rd bes 
21 a. . Pith rays scarcely ue Sg even with magnifler; wood soft and light, citi 
whitish, usually with a silky luster in a freshly-cut cross section; pores 
numerous and scatt teren LENE. Cottonwood. Willow. (Populus. Salix.) 
b. Wood nob completely ag in Ира rE EA e AE ONE vox Ж; 
22 a. Pith rays conspicuously | varying in width in cross section, some half as 
broad as others, the rays usually conspicuous without magnifier; wood 
usually hard hai heavy жуусу сены ESSA NEEDLE SMELL ETE. «v e's 23 
b. Pith rays not conspicuously varying in width as in а.................. 26: 
23 a. Wood appears mottled on radial section; pores usually visible without 
magnifier; wood usually vinous red.....Sycamore. (Platanus occidentalis.) 
Hi: Wood not comletPivy n4 dd. i... r.c rca eo daa eds aac УЛ, o is 24 
24 a. Wood with a reddish tinge; broad pith rays numerous. 
Beech. (Fagus grandifolia.) 
b. Wood whitish; broad pith rays not numerous; growth rings usually wavy. 
ech. (Carpinus ceroliniana. ) 
25 a. Wood usually greenish-white, epus ips when newly cut; pores. 
mall, numerous, crowded; wood light. 
White Wood. bev Poplar. (Liriodendron жабы: ) 
b; Waogdanotcmpiptely as DE УЛ оуу г шерж Лны КУ зик» Бр, МУ л. 
26 a. Wood usually light dius sometimes whitish when newly cut; pores за 
not crowded; wood comparatively soft and light. 
Basswood. (Tilia americana.) 
b; Wood mob: сеюру anin 8,.... rcli ev e pug ers Оне eee e. уз 27. 
27 a. Wood usually vinous red; pores numerous, scattered, conspicuous with 
magnifier, sometimes without; Hes rays give a silvery grain on the radial 
НОЖА ИТР tee ER а Cherry. uaa: serolina.) 
b. Wood whitish, silos or reddish; pores few; pith rays often appear as 
reddish patches on the radial. secon o.oo. exec ek 9er enel 28. 
28 a. Pith rays about as broad as the largest visible pores, plainly visible in cross 
section without magnifier; on radial нон im largest pith rays paced 
about j'; in. high; pores numerous and distinct.................... 
b. The аа pith rays about half as broad as ie a visible pores, diss 
visible on cross section т with magnifier; on radial section the largest 
pith rays appear about з; in. high; pores often appear as whitish specks 
on cross section especially when wood is wet; wood usually of fine texture. 
о 
30. 
29 a. The largest pith rays broader than the large pores; wood heavy and hard. 
ее ете 
b. The large pith t T. 5, 8 vidth т x акс ii 
weight and texture.. E S A EE cy dba ef E dE Soft yra 
ood not with ua ga either whitish, yellowish, or light aw. pem 
3r „Ры arranged in radial lines or patches; wood very hard and hea 
о. (Osirya еш 
