KEY TO THE TREES OF NEW ENGLAND.
| I. LEAVES SIMPLE. | ||
|---|---|---|
| Leaves alternate | A | |
| Outline entire | A C | |
| Outline slightly indented | A D | |
| Outline lobed | A E | |
| Lobes entire | A E F | |
| Lobes slightly indented | A E G | |
| Lobes coarsely toothed | A E H | |
| Leaves opposite | B | |
|---|---|---|
| A C | Ovate to oval, obscurely toothed | Tupelo |
| A C | Ovate to oval | Persimmon |
| A C | Also 3-lobed | Sassafras |
| A C | Sometimes opposite, clustered at the ends of the branchlets | Dogwoods |
| A D | Tremulous habit, oval | Poplars |
| A D | Lanceolate, finely serrate, sometimes entire | Willows |
| A D | Ovate-oval, serrate, doubly serrate | Birches Hornbeams |
| A D | Oval, serrate, oblong-lanceolate, veins terminating in teeth | Beeches Chestnut |
| A D | Ovate-oblong, doubly serrate, surface rough | Elms |
| A D | Ovate to ovate-lanceolate, serrate, surface slightly rough | Hackberry |
| A D | Outline variable, ovate-oval, sometimes lobed (3-7), serrate-dentate | Mulberry |
| A D | Ovate, serrate, oblong | Shadbush Plums Cherries |
| A D | Oval or oval-oblong, spines, evergreen | Holly |
| A D | Broad-ovate, one-sided, serrate | Linden |
| A D | Obovate, oval, lanceolate, oblong | Chestnut oaks |
| A D | Broad-ovate to broad-elliptical, thorny | Thorns |
| A E F | Lobes rounded | Sassafras |
| A E F | Base truncate or heart-shaped | Tulip tree |
| A E F | Obtuse, rounded lobes | White oaks |
| A E F | 3-5-lobed, white-tomentose to glabrous beneath | White poplar |
| A E G | 5-lobed, finely serrate | Sweet gum |
| A E G | Irregularly 3-7-lobed, serrate-dentate with equal teeth | Mulberry |
| A E H | Pointed or bristle-tipped lobes | Black oaks |
| A E H | Coarse-toothed or pinnate-lobed, short lobes ending in sharp point | Sycamore |
| B | Outline entire, ovate, veins prominent | Flowering dogwood |
| B | Outline serrate, apex often tapering | Sheep berry |
| B | Outline lobed | Maples |
| II. LEAVES COMPOUND. | ||
|---|---|---|
| Leaves pinnately compound | I | |
| Leaflets alternate | I A | |
| Outlines of leaflets entire | I A C | |
| Leaflets opposite | I B | |
| Leaves bi-pinnately compound | J | |
| I A | Outlines of leaflets with two or three teeth at base. | Ailanthus |
| I | Outlines of leaflets serrate | Sumacs (except Poison sumac) Mountain ashes Walnuts Hickories |
| I A C | Leaflets oval, apex obtuse | Locusts (except Honey locust) |
| I A C | Leaflets oblong, apex acute | Poison sumac |
| I B | Outlines of leaflets entire | Ashes (except Mountain ashes) |
| I B | Outlines of leaflets serrate | Ashes (except Mountain ashes) |
| I B | Leaflets irregularly or coarsely toothed, 3-lobed or nearly entire | Box elder |
| J | Irregularly bi-pinnate, outlines of leaflets entire, thorns on stem and trunk | Honey locust |
LIST OF PLATES.
| PLATE | PAGE | |
|---|---|---|
| I. | Larix Americana | [4] |
| II. | Pinus Strobus | [6] |
| III. | Pinus rigida | [7] |
| IV. | Pinus Banksiana | [9] |
| V. | Pinus resinosa | [11] |
| VI. | Picea nigra | [14] |
| VII. | Picea rubra | [16] |
| VIII. | Picea alba | [18] |
| IX. | Tsuga Canadensis | [20] |
| X. | Abies balsamea | [22] |
| XI. | Thuja occidentalis | [24] |
| XII. | Cupressus thyoides | [26] |
| XIII. | Juniperus Virginiana | [28] |
| XIV. | Populus tremuloides | [30] |
| XV. | Populus grandidentata | [32] |
| XVI. | Populus heterophylla | [34] |
| XVII. | Populus deltoides | [35] |
| XVIII. | Populus balsamifera | [37] |
| XIX. | Populus candicans | [39] |
| XX. | Salix discolor | [41] |
| XXI. | Salix nigra | [43] |
| XXII. | Juglans cinerea | [47] |
| XXIII. | Juglans nigra | [49] |
| XXIV. | Carya alba | [51] |
| XXV. | Carya tomentosa | [53] |
| XXVI. | Carya porcina | [55] |
| XXVII. | Carya amara | [57] |
| XXVIII. | Ostrya Virginica | [58] |
| XXIX. | Carpinus Caroliniana | [60] |
| XXX. | Betula lenta | [62] |
| XXXI. | Betula lutea | [64] |
| XXXII. | Betula nigra | [66] |
| XXXIII. | Betula populifolia | [68] |
| XXXIV. | Betula papyrifera | [70] |
| XXXV. | Fagus ferruginea | [72] |
| XXXVI. | Castanea sativa, var. Americana | [74] |
| XXXVII. | Quercus alba | [77] |
| XXXVIII. | Quercus stellata | [78] |
| XXXIX. | Quercus macrocarpa | [80] |
| XL. | Quercus bicolor | [82] |
| XLI. | Quercus Prinus | [84] |
| XLII. | Quercus Muhlenbergii | [85] |
| XLIII. | Quercus rubra | [87] |
| XLIV. | Quercus coccinea | [89] |
| XLV. | Quercus velutina | [91] |
| XLVI. | Quercus palustris | [93] |
| XLVII. | Quercus ilicifolia | [94] |
| XLVIII. | Ulmus Americana | [97] |
| XLIX. | Ulmus fulva | [98] |
| L. | Ulmus racemosa | [100] |
| LI. | Celtis occidentalis | [102] |
| LII. | Morus rubra | [103] |
| LIII. | Liriodendron Tulipifera | [103] |
| LIV. | Sassafras officinale | [108] |
| LV. | Liquidambar Styraciflua | [109] |
| LVI. | Platanus occidentalis | [111] |
| LVII. | Pyrus Americana | [113] |
| LVIII. | Pyrus sambucifolia | [115] |
| LIX. | Amelanchier Canadensis | [117] |
| LX. | Cratægus mollis | [121] |
| LXI. | Prunus nigra | [123] |
| LXII. | Prunus Americana | [124] |
| LXIII. | Prunus Pennsylvanica | [125] |
| LXIV. | Prunus Virginiana | [126] |
| LXV. | Prunus serotina | [128] |
| LXVI. | Gleditsia triacanthos | [130] |
| LXVII. | Robinia Pseudacacia | [132] |
| LXVIII. | Rhus typhina | [135] |
| LXIX. | Rhus Vernix | [137] |
| LXX. | Ilex opaca | [140] |
| LXXI. | Acer rubrum | [142] |
| LXXII. | Acer saccharinum | [144] |
| LXXIII. | Acer Saccharum | [146] |
| LXXIV. | Acer Saccharum var. nigrum | [147] |
| LXXV. | Acer spicatum | [149] |
| LXXVI. | Acer Pennsylvanicum | [151] |
| LXXVII. | Acer Negundo | [153] |
| LXXVIII. | Tilia Americana | [155] |
| LXXIX. | Cornus florida | [157] |
| LXXX. | Cornus alternifolia | [158] |
| LXXXI. | Nyssa sylvatica | [160] |
| LXXXII. | Diospyros Virginiana | [162] |
| LXXXIII. | Fraxinus Americana | [164] |
| LXXXIV. | Fraxinus Pennsylvanica | [165] |
| LXXXV. | Fraxinus Pennsylvanica. var. lanceolata | [166] |
| LXXXVI. | Fraxinus nigra | [168] |
| LXXXVII. | Viburnum Lentago | [169] |