Part 4

The Result of the Bee's Visit 184

Cross-fertilization of Arethusa 188

Habenaria Orbiculata. A Single Flower Enlarged 190

Orchis Spectabilis 191

Cross-fertilization of H. Orbiculata (Sphinx-moth) 193

The Flower and Column of Orchis Spectabilis, Enlarged 195

Orchis Spectabilis 195

Position of Pollen of Orchis Spectabilis Withdrawn on Pencil 197

The Cross-fertilization of Orchis Spectabilis 197

The Purple-fringed Orchid 199

The Ragged Orchid (Front Section) 200

The Ragged Orchid (Profile Section) 202

The Ragged Orchid (H. Lacera) and the Butterfly's Tongue. Cross-fertilization 203

The Yellow Orchid (H. Flava) 204

The Ragged Orchid (H. Lacera) 205

Cypripedium Acaule 207

Moccasin-flower (C. Acaule) 208

The Bee Imprisoned in the Lips of Cypripedium 210

Moccasin-flower. Bee Sipping Nectar 211

The Bee Passing Beneath the Stigma 213

A Bee Receiving Pollen-plaster on His Thorax 214

Rattlesnake-Plantain--the Young and the Old 215

Cross-fertilization of the Rattlesnake-Plantain. Side Sections 216

Cross-fertilisation of the Rattlesnake-Plantain. Front View 217

The Tongue of a Bumblebee 218

Goodyera, or Periamium Pubescens 221

Milkweed Captives 231

The Pollen Masses and the Fissure 232