I obtained seeds of P. officinalis from a
garden where the long-styled form alone grew, and raised 11 seedlings, which
were all long-styled. These plants were named for me by Dr. Hooker. They
differed, as has been shown, from the plants belonging to this species which in
Germany were experimented on by Hildebrand (5/13. 'Botanische Zeitung' 1865 page
13.); for he found that the long-styled form was absolutely sterile with its own
pollen, whilst my long-styled seedlings and the parent-plants yielded a fair
supply of seed when self-fertilised. Plants of the long-styled form of
Pulmonaria angustifolia were, like Hildebrand's plants, absolutely sterile with
their own pollen, so that I could never procure a single seed. On the other
hand, the short-styled plants of this species, differently from those of P.
officinalis, were fertile with their own pollen in a quite remarkable degree for
a heterostyled plant. From seeds carefully self-fertilised I raised 18 plants,
of which 13 proved short-styled and 5 long-styled.
Polygonum fagopyrum.
From flowers on long-styled plants fertilised illegitimately with pollen from
the same plant, 49 seedlings were raised, and these consisted of 45 long-styled
and 4 short-styled. From flowers on short-styled plants illegitimately
fertilised with pollen from the same plant 33 seedlings were raised, and these
consisted of 20 short-styled and 13 long-styled.
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