I enjoyed the novel just as much for the horticultural and botanical information on roses, their propagation from the 18th century onward, as well as for the complicated plot and the travel description of places in the U.K. such as Oxford, Dorset, Cornwall, London, and Wales.
There is a lot to like about this mystery by Anthony Eglin, which I think is better than his last, The Water Lily Cross, which had a too unbelievable plot - a waterlily hybrid that desalinates sea water, turning it into fresh water over time!
In The Trail of the Wild Rose, however, plant lovers will like Eglin's discourses on the history of the modern varieties of roses; travelers will like the descriptions of gardens around England, and mystery lovers will like the elaborate plot.
Plant hunters mysteriously start dying off in the novel, the first during an expedition in the mountains of Yunnan, China, and the second as a result of a hit and run four years later. Will similar "accidents" happen to the third, fourth, and fifth persons who were on the plant expedition with the first victim? What is behind the deaths, and does it have any relation to their plant gathering in China?
The plot has lots of red herrings, false leads, and more than a few culprits who go out of their way to obscure the truth.
Readers will find the protaganist, retired botanist and teacher Lawrence Kingston, very British and somewhat charming as he goes about sifting out facts, smelling the roses, and helping the police come up with the solutions.