. Bulletin. Forests and forestry. 65 Page. 40. Leaves with entire margins, 41 40. Leaves vpith toothed margins, 44 41. Leaves even-pinnate, Gleditsia and Gymnocladus in Leguminosae 177 41. Leaves odd-pinnate 42 42. Leaflets small, elliptic; twigs thorny Robinia in Leguminosae 181 42. Leaflets large, ovate; twigs not thorny, 43 43. Leaflets 7-21, not toothed at base, without glands, Rhus Vernix and R. copallina in Anacardiaceae 183 43. Leaflets 11-41, sometimes with 2-4 blunt teeth at base which have glands on lower side at the point of each tooth, Simarubaceae 187 44. Twigs and leaves prickly;
. Bulletin. Forests and forestry. 65 Page. 40. Leaves with entire margins, 41 40. Leaves vpith toothed margins, 44 41. Leaves even-pinnate, Gleditsia and Gymnocladus in Leguminosae 177 41. Leaves odd-pinnate 42 42. Leaflets small, elliptic; twigs thorny Robinia in Leguminosae 181 42. Leaflets large, ovate; twigs not thorny, 43 43. Leaflets 7-21, not toothed at base, without glands, Rhus Vernix and R. copallina in Anacardiaceae 183 43. Leaflets 11-41, sometimes with 2-4 blunt teeth at base which have glands on lower side at the point of each tooth, Simarubaceae 187 44. Twigs and leaves prickly; leav4s twice or thrice compound, Araliaceae 199 44, Twigs and leaves not prickly; leaves once compound, 45 45. Large trees; staminate flowers in aments; fruit a .nut, Juglandaceae 100 45. Small trees; staminate flowers not in aments; fruit red and fleshy, 46 46. Leaflets 13-15; sap not milky; branches heavy-tipped Pyrus americana in Rosaceae 173 46. Leaflets 11-31; sap milky; branches heavy-tipped, Rhus typhina and R. glabra in Anacardiaceae 183 TABULATION OP GENERA AND SPECIES. Species. Families, Genera, Gymnospermae. Fam. I. Pinaceae. Gen. 1. Pinus, Gen. 2. Larix, Gen. 3. Picea Gen. 4, Abies, Gen. 5. Tsuga, Gen. 6. Chamaecyparis, Gen. 7. Thuya Gen. 8. Juniperus, — Angiospermae. Fam. II. Salicaceae. Gen. 9. Salix, Gen. 10. Populus, Fam. III. Juglandaceae, Gen. 11. Juglans Gen. 12. Carya Fam. IV. Betulaceae. Gen. 13. Corylus, Gen. 14. Ostrya, Gen. 15. Carpinus, — Gen. 16. Betula, Gen. 17. Alnus, Fam. V. Fagaceae. Gen. 18. Fagus, Gen. 19. Castanea, Gen. 20. Quercus, 30O 34 100 19 5 15 3 a 1 15 10 4 (15)^ 4 5 (1) Ml) 1 5 1 (1) 1 2 1^ 5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pennsylvania. Dept. of Forests and Waters. Harrisburg, Pa. : The Department
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