Page:Darwin - The various contrivances by which orchids are fertilized by insects (1877).djvu/315

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295 butterflies. INDEX. dendrobium. 295
  • pollen-tubes, 258; Sprengel's work, 275
  • Butterflies with attached polli,ia, 31
  • Butterfly orchis, 69
  • ——, lesser, 73
  • Caladenia dimorpha, 89
  • Calæna, 89
  • Calanfhe dominii, 161
  • —— masuca, structure of flower, 161; long nectary, 267, 269
  • —— veratrifolia, 280
  • —— vestita, 162
  • Carpenter, Dr., on Myanthus and Catasetum, 196
  • Catasetidæ, 178
  • Catasetum, peculiar rostellum, 256; labellum, 270
  • —— callosum, 192, 195
    • —— luridum, 191
  • —— mentosum, 206
  • —— planiceps, 193
  • —— saccatum, structure of flower, 180–185; vessels of, 239
  • —— tabulare, 192
  • —— tridentatum, structure of flower, 191; three forms on the same plant, 196; a male orchid, 197; vessels of, 239; peculiar form of rostellum, 256; nectar-receptacle, 269
  • Cattleya, structure of flower, 143–148; vessels of, 239; nectary, 265
  • —— crispa, 147
  • Caudicles of pollinia in the Vandex, 152; development of, 252; structure, 260, 261
  • Cephalanthera, number of seeds, 277
  • —— ensifolia, 86
  • —— grandiflora, structure of flower, 80–86; vessels, 239, 242; change of colour in viscid secretion, 249; pollen, 259; labellum, 269; number of seed, 277; upright position of flower, 287; partially self-fertile, 290
  • Cheeseman, Mr., on Pterostylis trullifolia, 88; Acianthus sinclairii, 90; imperfect fertilisation of Pterostylis, 280
  • Chysis, 146
  • Cirrhæa, contracted stigma, 171
  • Clinandrum, the, 241
  • Cœlogyne cristata, 146
  • Coryanthes, 90, 173; nectary, 232; secretion of nectar, 265
  • —— fieldingii, 175
  • —— macrantha, 175
  • —— speciosa, structure of flower, 174
  • —— triloba, partially self-sterile, 281
  • Crüger, Dr., on the Epidendreæ, 147; Gongora maculata, 168; Stanhopea, 171; Coryanthes, 173; C. macrantha, 175;

Catasetum, 197, 200; female pollen-masses, 202; Selenipedium palmifolium, 232; homologies in Orchids, 235; bees gnawing the labellum, 270

  • Cyonoches egertonianum, 224
  • —— ventricosum, structure of flower, 220–224
  • Cymbidium giganteum, 155; pollinia, 252, 260; modification of form, 263
  • Cypripedium, structure of flower, 226; secretion from, 229; pollen, 262; labellum, 275
  • —— acaule, 229
  • —— barbatum, vessels of, 239
  • —— calceolus, 229–231; fertilised only by small bees, 282
  • —— candidum, 235
  • —— pubescens, 229, 230
  • —— purpuratum, vessels of, 239
  • Cyrtostylis, 90
  • Darwin, Francis, on the movement of the awn of Stipa, 273
  • ——, George, insects fertilising Herminium monorchis, 61; Gymnadenia conopsea, 67
  • ——, William, on Epipactis palustris, 99, 100
  • Delpino on insects being deceived by the presence of a nectary not containing nectar, 41; sterility of Spider Ophrys, 50, 51; Cephalanthera ensifolia, 86; movements of pollinia, 155; fertilisation of Cypripedium calceolus, 231; imperfect fertilisation of Ophrys aranifera in Liguria, 280
  • Dendrobium, length of anther, 287
  • —— bigibbum, 142
  • —— cretaceum, 142, 291