TREE DISTRIBUTION MAPS 
Map no. Map no. 
Pinus strobus Linnaeus, northern white pine____________ 1 Chamaecyparis thyoides (Linnaeus) Britton, Sterns, and 
Pinus monticola Douglas, western white pine___________ 2 Poggenberg, southern white cedar___-______________- 55 
Pinus lambertiana Douglas, sugar pine________________- 3 Chamaecyparis nootkatensis (Lambert) Spach, Alaska 
Pinus flexilis James, limber pine____1___-_---_-_-____- 4 CTE es 8 py gn ey a KG 47s OL AO eg PO 56 
Pinus albicaulis Engelmann, whitebark pine____________ 5 Chamaecyparis lawsoniana (A. Murray) Parlatore, Port 
Pinus strobiformis Engelmann, Mexican white pine______ 6 Orfordicedar= ees Hat se ee ae eee eee eee Se 57 
Pinus cembroides Zucecarini, Mexican pifion____________- 7 ~~ Juniperus occidentalis Hooker, western juniper____-____- 58 
Pinus edulis Engelmann, pifion___________-___-___-__- 8 Juniperus virginiana Linnaeus, eastern red cedar___-___- 59 
Pinus monophylla Torrey and Fremont, singleleaf pifion__ 9 Taxus brevifolia Nuttall, Pacific yew_.-..______________ 60 
Pinus balfouriana A. Murray, foxtail pine____-_-_______ 10 Juglans cinerea Linnaeus, butternut______.___________- 61 
Pinus aristata Engelmann, bristlecone pine____________- ll =X Juglans quadrangulata ese 62 
Pinus resinosa Aiton, red pine____.-.2-----_-_---_--_- 12. Juglans nigra Linnaeus, black walnut! ~ 7777777777777 77 
Pinus ponderosa Douglas, ponderosa pine_____________- 13 Hicoria pecan (Marshall) Britton, pecan______________- 63 
Pinus jefreyt Greville and Balfour, Jeffrey pine________ 14 Hicoria cordiformis (Wangenbeim) Britton, bitternut 
Pinus contorta Douglas, lodgepole pine________________- 15 ni CKO ya ee ee tak nea emee bees snk ee eee eee 64 
Pinus sabiniana Douglas, digger pine___---___-__-_____- 16 Hicorza ovata (Miller) Britton, shagbark hickory__-_____- 65 
Pinus coultert D. Don, Coulter pine____.._--_--------- 17 ~~ Hicoria laciniosa (Michaux filius) Sargent, bigleaf shag- 
Pinus taeda Linnaeus, loblolly pine______- SRS BSS alae 18 barkehickorye= 2s ee see oe aan oe See sae ee eee 66 
Pinus rigida Miller, pitch pine____-_-_-_---_-_-------- 19 Hicoria alba (Linnaeus) Britton, mockernut hickory--____ 67 
Pinus rigida serotina (Michaux) Loudon, pond pine_____ 20 _Hicoria glabra (Miller) Sweet, pignut hickory__________- 68 
Pinus virginiana Miller, Virginia pine-____-___________- 21 Populus tremuloides Michaux, aspen_-________-___----_- 69 
Pinus echinata Miller, shortleaf pine__._.---.---.------ 22 Populus grandidentata Michaux, largetooth aspen __-_-_- 70 
Pinus glabra Walter, spruce pine____-.---_------------ 23 Populus heterophylla Linnaeus, swamp cottonwood_--_-__- 71 
Pinus banksiana Lambert, jack pine_____________-____- 24 Populus balsamifera Linnaeus, balsam poplar-__--_----_- 72 
Pinus palustris Miller, longleaf pine_-_---------------- 25 Populus trichocarpa Torrey and Gray, black cottonwood. - 73 
Pinus caribaea Morelet, slash pine___~-- ~~ _- Sere se = 26 Populus deltoides Marshall, eastern cottonwood________- 74 
Larix laricina (DuRoi) K. Koch, tamarack___________- 27 = Populus deltoides virginiana (Castiglioni) Sudworth, 
Larix occidentalis Nuttall, western larch______________- 28 southern ecottonwood______________________________ 7d 
Picea mariana (Miller) Britton, Sterns, and Poggenberg, Salix nigra Marshall, black willow___________________- 76 
DIdCiasDnlCOe ne eens ee ase ee eee a 29 Salix amygdaloides Andersson, peachleaf willow______~- Le 
Peccea, nisora. bink,#: Ted«sSpruce= =... =. ke seek 30 Carpinus caroliniana Walter, blue beech___-_--_----__- 78 
Picea glauca (Moench) Voss, white spruce____________-- 31 Ostrya virginiana (Miller) K. Koch, hophornbeam_______ 79 
Picea engelmannt (Parry) Engelmann, Engelmann spruce_- 32 Betula lenta Linnaeus, sweet birch__-_-._..______-______- 80 
Picea pungens Engelmann, blue spruce---------------- 33 Betula lutea Michaux filius, yellow bireh______________- 81 
Picea sitchensis (Bongard) Carriére, Sitka spruce.__-___- 34 Betula nigra Linnaeus, river birch____________._______- 82 
Tsuga canadensis (Linnaeus) Carriére, eastern hemlock __ 35 Betula populifolia Marshall, gray birch_______________- 83 
Tsuga heterophylla (Rafinesque) Sargent, western hem- Betula papyrifera Marshall, paper birch_..-..-._-_____- 84 
NG C kee eee ees a ee see eee eae ees Se 36 Alnus rubra Bongard,! red alder______-___.----------- 85 
Tsuga mertensiana (Bongard) Sargent, mountain hem- Alnus rhombifolia Nuttall, white alder__-_._._________- 86 
IOGK. .ae SoS SoG e a See ees ee oe ee a 37 Fagus grandifolia Bhrhart, beech___...._.--_---------- 87 
Pseudotsuga taxifolia (Lambert) Britton,’ Douglas fir___. 38 Castanea pumila (Linnaeus) Miller, chinquapin________- 88 
Pseudotsuga macrocarpa (Torrey) Mayr, bigeone-spruce_- 39° Castanea dentata (Marshall) Borkhausen, chestnut--_ ---- 89 
Abies balsamea (Linnaeus) Miller, balsam fir_____----_- 40 Lithocarpus densiflora (Hooker and Arnott) Rehder, 
Abies lasiocarpa (Hooker) Nuttall, alpine fir__.._______~ 41 FELTING) Gl eens ae a ee Se ne eee 90 
Abies arizonica Merriam, corkbark fir____-..---.------ 42 Quercus borealis Michaux filius, red oak________________ 91 
Abies grandis Lindley, lowland white fir______________- 43 Quercus borealis maxima (Marshall) Ashe, red oak_______ 92 
Abies concolor Lindley, white fir__----_.-------------- 44 Quercus palustris Muenchhausen, pin oak_____________- 93 
Abies amabilis (Douglas) Forbes, silver fir-_.----___---- 45 Quercus shumardii Buckley, Shumard red oak_________- 94 
alvesnopuvse mindley, noble fir-— =. 252... 222-525 46 Quercus ellipsoidalis E. J. Hill, jack oak______________- 95 
Abies magnifica A. Murray, California red fir._________- 47 Quercus coccinea Muenchhausen 
Abies magnifica shastensis Lemmon, Shasta red fir_______ 48 Quercus coccinea tuberculata sem ne Searet oak -------- 96 
Sequoia washingtoniana (Winslow) Sudworth, bigtree____ 49 Quercus velutina La Marck fo = k 97 
Sequoia sempervirens (Lambert) Endlicher, redwood_____ 50 Quercus velutina missouriensis Sargent as ea 
Taxodium distichum (Linnaeus) Richard, southern cy- Quercus kelloggii Newberry, California black oak__-____- 98 
POSSESS 5 a ae 51 Quercus ilicifolia Wangenheim, bear oak_________-____- 99 
Itbocedrus decurrens Torrey, incense cedar_____________ 52 Quercus rubra Linnaeus, southern red oak_____________- 100 
Thuja occidentalis Linnaeus, northern white cedar-_----- 53 Quercus rubra pagodaefolia (Elliott) Ashe, swampredoak__ 101 
Thuja plicata D. Don, western red cedar_____--_------_- 54 Quercus marilandica Mere nanser {blackjack Seeks 405 
2 Although this name has been adopted in the Check List many well-qualified 
taxonomists prefer Picea rubens Sargent. 
3 Although this name has been adopted in the Check List many well-qualified 4 Although this name has been adopted in the Check List many well-qualified 
taxonomists prefer Pseudotsuga mucronata (Rafinesque) Sudworth. taxonomists prefer Alnus oregona Nuttall. 
(3) 
Quercus marilandica asheit Sudworth 
