Herbert, Dean, on Catasetum luridum and Myanthus, 196
Herminium monorchis, 59; fertilised by insects, 61; rostellum, 255
Hildebrand, F., on the ovules in Orchids, 172
Homologies of Orchids, 232
Hooker, Dr., on Listera, 3, 115; labellum of Calæna, 89; obligations to, 115, 128, 244; spiral vessels in Orchids, 235; variability of the labellum of Orchids, 238; on the rostellum, 254
Horwood, Mr., assistance from, 129
Insects, frequency of visits to Orchids, 33; attracted by bright colours, 275
Irmisch on Epipogium, 103; Neottia nidus-avis, 125; flower-bud of Cypripedium, 240
Krünitz, secretion of nectar by Orchis, 36
Kurr, on Orchids secreting nectar, 38; secretion from hairs in Cypripedium calceolus, 229; nectar secreted from bracteæ, 266
Labellum easily vibratile, 138; cup of, not secreting nectar in the Vandeæ, 269; excrescences on, 269; gnawed by insects, 270; its importance to the flower, 275; of Sarcanthus, 276
Ladies' slipper, 227
—— tresses, 106
Lælia, 146
——cinnabarina, 148
Lepidoptera with attached pollinia, 30, 31
Leptotes, 146
Lindley, Dr., obligations to, 129; arrangement of Orchids, 128; on forms of Catasetum, 197; of Cycnoches, 224; homologies of Orchids, 235; on the number of genera and species, 279
Link on homologies of Orchids, 235, 238
Liparis pendula, vessels of, 239; clinandrum, 241
Listera, viscid matter, 251; crest of rostellum, 287
——cordata, 124
——ovata, structure of, 115–124; labellum, 276
Lycaste skinnerii, 155; pollen of 260
Malaxeæ, 128
Malaxis, viscid matter, 251; upper petals, 276
——paludosa, transplanted, 32; structure of flower, 129–135; vessels, 239, 241; clinandrum, 241; pollen-tubes, 258; position of labellum affected by ovarium, 284
Malden, Rev. B. S., obligations to, 35, 64
Male flowers of Catasetum, 198
Marantaceæ, 238
Marshall, Mr., on sterility of transplanted Orchids, 32; Habenaria chlorantha, 72,
