155 
KEY TO THE WILD AND CULTIVATED 
TREES IN AUTUMN* 
Bv CHESTER ARTHUR DARLING 
т а. Leaves about 1/8 in. or less broad, often еуегргееп.................... 2. 
b Leaves acre than rja in. broads < 2 sees cee wae po es HUE da e E 34. 
2a 
e 
. Leaves as more or less appressed to the stem, the tips sometimes 
s 
3 
. Leaves на linear, or needle-like, not appressed to the stem..... 6. 
. Branchlets appear more or less "n not flattened laterally; all leaves 
more or less keeled.............. edar. (Juniperus virginiana.) 
b. Branchlets appear much flattened ord. two rows of leaves flat and two. 
ГО усылы OF Teds. 7, guion o Ce cle FA Va FUE Mee qoe aie eer Re 4- 
4a. Branchlets about 1/16 in. broad, the flat leaves with a discoid marking on 
the hack. bana as Southern White Cedar. (Chamaecyparis thyoides. "à 
b. Branchlets about 1/6 in. uae ее oe er Be Oey a ECL ee еН 
5 a. Branchlets Hghter colored benea ..Arbor Vitae. (Thuja из кш, ) 
n both sides. odii Arbor Vitae. (Thuja orientalis.) 
6 a. DE ip ОЛКО these... ls i ne AN ER rk eom rr xn ку T 
b. Leaves attached singly to the віш. os eset ec rire 20. 
үй Leaves ТИ жүз; +. «бин sa its pid cr Ives Co CS Ue te ае кр 8. 
5. Leaves тоог more in a Clustet- ... она нА i UNS ЕА I 
Ba. Leaves in clusters of S, ӨР БОЕ т 478. oe ee ns wip ori ot ERR ows 9. 
b Lenvesin clusters of 4 UE 3:5... Л sonas, recht o E iei a s eV ad d II 
9 a. Leaves 5-8 in. long, drooping, the young branches онуй; cultivated tree. 
B e. (Pinus excelsa.) 
b. Leaves 2—5 in. long, not drooping, young branches not whitish.......... то. 
то а. Young branches covered with brownish hairs; mature cones 2—4 in. long; 
cultivated. tee. н rele er ku) Swiss Stone Pine. (Pinus cembra.) 
b. кеше branches not covered with brownish hairs; mature cones 3-6 in. long; 
tree, often planted............ White Pine. (Pinus Strobus.) 
‚фк Léaves ыт соз жт жел гш lot di doa Re AAD ааа ае рз EIE M ^ 
Leaves in clüsters ОЁ 5. or some 38, o o zur ee es ee CR EY 13. 
12 а. Cultivated tree; mature cones 4-6 in. lon 
Western s Pine. (Pinus ponderosa.) 
b. Native tree; mature cones 2-3 in. long...Pitch Pine. (Pinus rigida.) 
. Average 1 ess than 4 in long........ I4 
b A eerie bol à In. от иие IUE res or rr RE RICE 15. 
* This key is designed to be used in the field to determine the trees to be found 
growing in the eastern United States. In using the key begin with No. r, read both 
a and b and Soop | the one "oa n uem кое trail tes n as — by 
the number t vU 
of the specimen is bhia Accuracy in observation and in following the key 
are of first importance, choosing an average specimen is likewise important. Ad- 
ditional copies of this key may be had for то cents by addressing the author at 
umbia University, New York City. 
