XU CONTENTS. 



CHAPTER III. 



AKKTHUSE^, 



Cophalanthera grandiflora ; rostellum aborted ; early penetration of 

 the pollen-tubes ; case of imperfect self-fertilisation ; cross- 

 fertilisation effected by insects which gnaw the labellum — 

 Ce]tha]anthera ensifolia — Pogonia — Pterostylis and other 

 Australian orchids with the labellum sensitive to a touch — 

 Vanilla — Sobralia Pages 80-92 



CHAPTER IV. 



KEOTTE^. 



Epipactis palustris ; curious shape of the labellum and its import- 

 ance in the fructification of the flower — other species of Epi- 

 pactis — Epipogium — Goodyera repens — Spiranthes autumualis ; 

 perfect adaptation by which the pollen of a younger flower is 

 carried to the stigma of an older flower on another plant — 

 Listera ovata ; sensitiveness of the rostellum ; explosion of 

 viscid matter; action of insects; perfect adaptation of the 

 several organs — Listera cordata — Neottia nidus-avis; its 

 fertilisation eflected in the same manner as in Listera — Thely 

 mitra, self-fertile 93-127 



CHAPTER V. 



MALAXEiE AXD EPIDENDKE^. 



Malaxis paludosa — Masdevallia, curious closed flowers — Bolbo- 

 phyllum, labellum kept in constant movement by every breath 

 of air — Dendrobium, contrivance for self-fertilisation — Cattleya, 

 simple manner of fertilisation — Epidendrum — Self-fertile Epi- 

 dendrejB 128-148 



