312 THE BOTANISTS OF PHILADELPHIA. 



60. ''Iron Wood, Hop-Hornbeam." VI : 40. 



61. '' Tree Form and Tree Photography." VI : 72. 



62. ''Caryatomentosa." VI : 88. 



63. '* Rock Oak, Eock Chestnut Oak." VI : 104. 



64. ''Pin Oak." VI : 121. 



65. "Red Maple." VI : 137. 



66. "Yellow Birch." VI : 152. 



67. "Black Birch." VI : 169. 



68. "The Red Spruce." VI : 184. 



69. "Honey Locust." VI : 201. 



70. "Swamp Magnolia." VII : 8. 



71. " Big White Oaks." VII : 24. 



72. "A Pennsylvania Sequoia." VII : 24. 



73. "The Black Spruce." VII : 40. 



74. "The Origin of Floral Structures. Review of Rev. George Hen- 

 slow's Book." — The American. 



75. " Some Observations on the Bahamas and Jamaica." — Proceedings 

 American PJiilosopMcal Society, XXIX : 145. 



76. ' 'A Monstrous Specimen of Rudbeckia hirta. ' ' — Contributions Botan- 

 ical Laboratory University of Pennsylvania, I : 3. 



77. ' 'A Nascent Variety of Brunella vulgaris. ' ' — Contributions Botanical 

 Laboratory University of Pennsylvania, I : 64. 



78. "A Rare Button wood. "—G^ar^e^ and Forest, III : 69. 



79. "The Action of Root Hairs, Illustrated." — Garden and Forest, 

 III : 94. 



80. " Poisonous Properties of the Leguminosse. " — Proceedings Academy 

 of Natural Sciences, 1877, 274. 



81. "Relation of the Medullary Rays to the Strength of Timber." — 

 Proceedings Academy of Natural Sciences, 1884, 14. 



82. ' ' The Internal Cambium Ring in Gelsemium sempervirens. — Pro- 

 ceedings Academy of Natural Sciences, 1885, 22. 



83. "Mimicry Among Plants." — Proceedings Academy of Natural 

 Sciences, 1888, 12. 



84. " Remarks on Death of Professor Asa Gray. " — Proceedings Academy 

 of Natural Sciences, 1888, 62. 



85. "The Sand Dunes of Lewes, Delaware." — Proceedings Academy 

 of Natural Sciences, 1889, 134. 



