Illustrations. 
PLATES. 
PLaTE— Page 
(PINUS StEO MUS) (Wilt ey TNe) eres a a 21 
8) Rinus Bankeianal (Grae or Jack Rime) a.) 4s. 6 an eee 23 
Gye JeaboTs \ahreananenmeh ((Syerewiloy JENN) cane boarassounsesacceesccsncece 25 
IQs lbeweab< lignavemnatey (Clevanenreli\e ces. solos eka cce ose es ddcdebaceccucsc 27 
i tsugaycanadensich(:lemilocks) yes yer ar Sey a ee 28 
125 laxo ciumocistichumls(CiyoreSs) ees eva a ee ee 30 
13; shujayoccrdentalis((At;bor=Vaitae))\ees se ie er ne 32 
14. Juniperus virginiana (Red Cedar)....................0...5.5.0: 34 
GS, woeNbibe ravens (UBVEelk< \WAIMONY)) 4 ohooh boockssccedecodcoundccousssce Bi 
16. Salix amygdaloides (Peach-leaved Willow)..................... 38 
i772 Salaxchucidan(Sinimy |Walllows)sne ues ee sg a eee 40 
Isls Sevbbceilloes, (Ohlone: WMGUKON ewe ens sesddecssucobe sos gaaceansvcoaes 42 
19S SPRopuluusralloas(Siliver-leatsRoplan) ys a: sa ee eee 44 
20. Populus grandidentata (Large-toothed Aspen).................. 45 
21. Populus heterophylla (Large-leaved Cottonwood).............. 48 
22. Populus tremuloides (Quaking Asp)......................./.... 49 
23) Populus deltordes; (Cottonwood) hee. 45.0. see aeeeee 50 
24> Juclans micra (Slack Wall) e eye eines oe ee eee 54 
25a Juclansrcimenre a G3 wtieTMUit)) eer rine cee cen eye tes aos ae 56 
26. hicortaskecan! (Recam) ais ek ase ali yin ues aU 59 
27. Hicoria cordiformis (Pignut Hickory).......................... 60 
28) Hhiconay ovata (Shellbark Hickory) -, 559245. nee 63 
29. Hicoria laciniosa (Big Shellbark Hickory)..................... 66 
30. Hicoria microcarpa (Small-fruited Hickory).................... 68 
Sl kniconiavallllo an (Wihite lickomy))-06. yen ee ee eee 70 
S28 Euconarclaonay (blackablickonyy)ae ores sea earn ree 71 
33. Carpinus caroliniana (Blue or Water Beech).................... 74 
a4. Ostryawarginiana, (ironwOod)hine. ) 2 ent ners ee eee 76 
so Betulalutean@VvelllowBimclay) ieee ee ay ieee ce Sunless 79 
30) Betula mignal(Waterorteds birch) Se yee id oe ee eee 82 
37. Betula populifolia (Gray or White Birch)...................... 84 
30.) betula: papyritera (Canoe Birch) ee ee eee 85 
3927S Imus) ineana: haesAlder) eis etn nis sae ho ete ne 87 
400A lmussrugosal iGAl den) ir. are ee econ ies iy eee eRe noe a 89 
Alm hacusvoranditolian (Seek) emis seas me eae e ee eWr etree 90 
422 Castaneay dentatan(Chestnuit)esn.. sa. aes Aerie ee some 93 
43s. @uercusyalily ai @WilniteiO@ aki wee ae nares ey ea ye ee eae 98 
44. Quercus alba x Muhlenbergil (Hybrid Oak)..................... 100 
A>: Quercus) stellata. (Poste Oakey yes sae Ue eer ee ee 102 
AGy Quercus: lyratay (Overcup! @alks) ye) ano ae ace eee 104 
Aj Quercus macro can ay (unt ©)/a) ks) peer aerar en ane neue eae 106 
48. Quercus bicolor (Swamp White Oak).............. oe. 5 ie eae 108 
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