202 ILLINOIS ACADEMY OF SCIENCE 



31. Hackberry (Celtis occidentaUs) III. 



32. Red Mulberry (Morus rubra) III. 



33. Witch Hazel (Hamamelis virginiana) III. 



34. Sycamore (Platanus occidentaUs). 



35. Iowa Crab (Pyriis icensis) III, IV. 



36. Service-berry, Jnneberry ( Amelanchier canadensis) 



III. 



37. Cockspur Thorn (Crataegus crus-galli) III. 



38. Dotted Haw (Crataegus punctata) II, III. 



39. Downy Haw (Crataegus mollis) II, III. 



40. Red Haw (Crataegus coccinea) III. 



41. Long-spine Haw (Crataegus macracantlia) III. 



42. Black Cherry (Prunus serotina) II, III, IV. 



43. Choke-cherry (Prunus virginiana) II, III, IV. 



44. Wild Red Cherry (Prunus pennsylvanica) II, III, 



IV. 



45. Black Plum (Prunus nigra) II, III, IV. 



46. Wild Plum (Prunus americana) II, III, IV. 



47. Coffee-tree (Gymnocladus dioicus) III. 



48. Honey Locust (G-leditsia triacanthos) III. 



49. Prickly Ash ( Xanthoxyluni clava-herculis) II, III. 



50. Staghorn Sumach (Rhus typhina) III. 



51. Sugar Maple (Acer saccharum) II, III. 



52. Black Maple (Acer sacckaritm-nigrum) III. 



53. Silver Maple (Acer saccharinum) III. 



54. Box-elder (Acer negundo) II, III. 



55. Basswood (Tilia americana) II, III. 



56. White Ash (Fraxinus americana) II, III. 



57. Red Ash (Fraxinus pennsylvanica) II. 



58. Green Ash (Fraxinus lanceolata) III. 



59. Black Ash (Fraxinus nigra) III. 



60. Wild Snowball (Viburnum ojmlus americanum) III. 



61. Sheepberry (Viburnum lentago) II, III. 



62. Black Haw (Viburnum prunifolium) III. 



