- 1Dedication — Introduction
- 2Chapter I — Heterostyled Dimorphic Plants: Primulaceæ
- 3Chapter II — Hybrid Primulas
- 4Chapter III — Heterostyled Dimorphic Plants — Continued
- 5Chapter IV — Heterostyled Trimorphic Plants
- 6Chapter V — Illegitimate Offspring of Heterostyled Plants
- 7Chapter VI — Concluding Remarks on Heterostyled Plants
- 8Chapter VII — Polygamous, Dioecious, and Gyno-Dioecious Plants
- 9Chapter VIII — Cleistogamic Flowers
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