From statements
made by Vaucher I was led to think that Soldanella alpina was heterostyled, but
it is impossible that Kerner, who has closely studied this plant, could have
overlooked the fact. So again from other statements it appeared probable that
Pyrola might be heterostyled, but H. Muller examined for me two species in North
Germany, and found this not to be the case.
CHAPTER II.
HYBRID PRIMULAS.
The oxlip a hybrid naturally produced between Primula veris and vulgaris.
The differences in structure and function between the two parent-species.
Effects of crossing long-styled and short-styled oxlips with one another and
with the two forms of both parent-species.
Character of the offspring from oxlips artificially self-fertilised and cross-
fertilised in a state of nature.
Primula elatior shown to be a distinct species.
Hybrids between other heterostyled species of Primula.
Supplementary note on spontaneously produced hybrids in the genus Verbascum.
The various species of Primula have produced in a state of nature throughout
Europe an extraordinary number of hybrid forms. For instance, Professor Kerner
has found no less than twenty-five such forms in the Alps. (2/1. "Die
Primulaceen-Bastarten" 'Oesterr. Botanische Zeitschrift' Jahr 1875 Numbers 3, 4
and 5. See also Godron on hybrid Primulas in 'Bull.
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