interesting collection of articles by Charles Darwin and his son Francis Darwin
On the Two Forms, or Dimorphic Condition, in the Species of Primula, and on their remarkable Sexual Relations. (Read Nov. 21, 1861). 8vo. (210 x 135mm), pp. 77-96, with 2 illustrations.
(Together with:) DARWIN, C. On the existence of two forms, and on their reciprocal sexual relation,in several species of the genus Linum. (Read Feb...