Fertilization p. 63 from Charles Darwin's On the various contrivances by which British and foreign orchids are fertilised by insects p. 18-19 from Charles Darwin's On the various contrivances by which British and foreign orchids are fertilised by insects
p. 63 from Charles Darwin's On the various contrivances by which British and foreign orchids are fertilised by insects
p. 18-19 from Charles Darwin's On the various contrivances by which British and foreign orchids are fertilised by insects