Diphylleia cymosa, xlii, 23.
Diplocea barbata, i, 252.
Dracena borealis, iv, 61.
Eleocharis compressa, xlii, 50.
Elymus hystrix, iv, 58.
Equiseta, North American, A. Braun's monograph, with additions by G. Engelmann, xlvi, 81.
Equisetum arvense, xlvi, 83.
— boreale, xlvi, 90.
— eburneum, xlvi, 84.
— giganteum, xlvi, 91.