ect male; I
still should incline to think it would produce by seed both sexes.
But you are right about Primula (and a very acute thought it was):
the long-styled P. sinensis, homomorphically fertilised with own-form
pollen, has produced during two successive homomorphic generations only
long-styled plants. (635/1. In "Forms of Flowers," Edition II., page
216, a summary of the transmission of forms in the "homomorphic" unions
of P. sinensis is given. Darwin afterwards used "illegitimate" for
homomorphic, and "legitimate" for "heteromorphic" ("Forms of Flowers,"
Edition i., page 24).) The short-styled the same, i.e. produced
short-styled for two generations with the exception of a single plant.
I cannot say about cowslips yet. I should like to hear your case of the
Primula: is it certainly propagated by seed?

LETTER 636. TO J. SCOTT. Down, December 3rd, [1862?].

What a capital observer you are! and how well you have worked the
primulas. All your facts are new to me. It is likely that I overrate the
interest of the subject; but it seems to me that you ought to publish a
paper on the subject. It would, however, greatly add to the value if you
were to cover up any of the forms having pistil and anther of the same
height, and prove that they were fully self-fertile. The occurrence of
dimorphic and non-dimorphic species in the same genus is quite the
same as I find in Linum. (636/1. Darwin finished his paper on Linum
in December 1862, and it was published in the "Linn. Soc. Journal" in
1863.) Have any of the forms of Primula, which are non-dimorphic, been
propagated for some little time by seed in garden? I suppose not. I
ask because I find in P. sinensis a third rather fluctuating form,
apparently due to culture, with stigma and anthers of same height.
I have been working successive generations homomorphically of this
Primula, and think I am getting curious results; I shall probably
publish next autumn; and if you do not (but I hope you will) publish
yourself previously, I should be glad to quote in abstract some of your
facts. But I repeat that I hope you will yourself publish. Hottonia is
dimorphic, with pollen of very different sizes in the two forms. I think
you are mistaken about Siphocampylus, but I feel rather doubtful in
saying this to so good an observer. In Lobelia the closed pistil grows
rapidly, and pushes out the pollen and then the stigma expands, and the
flower in function is monoecious; from appearance I