Walkway at Cambridge University Botanic Garden.
Image: Bob O’Hara, 23 April 2009 [larger view].
According to the photographer, the director led them on a tour of the gardens. He said it was laid out by one of Darwin’s mentors to show the variation in the plants. Apparently, the trees were paired up to show morphological variation by Henslow, the man who recommended that Darwin accompany the captain on the Beagle‘s famous voyage. The director of the gardens was really pleased to have worked this out: it ties in with Darwin’s intellectual development.