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Act. Acad. St. Petersburg. 1781. Part II. p. 303
of the Species to be mentioned. I cannot find out in Don or Persoon country of D. inermis. or D. Tatula (a)

D. inermis ♀** – Stramonium americanum minus Alkekangi folio. Imp. Josef. Hort. Cent. III. p. 44. to 82

D. ferox ♂ China H.
one capsule on the flowers of D. inermis gave 321. & the second 380 good seeds. – Whence many hybrid plants sprung, intermediate between parents but colour inexpectata – Pollen-grains, although many regularly shaped & filled with sperm, yet with them were interspersed many "vacuae et effaetae, manifesto certa natura hybridae indicio." – The capsules of those hybrids, cultivated sub dio. contained 120 to 130 seeds, but those transplanted in pots gave only 60 – to 70. – (NB this is most important we see injurious conditions aiding infertility of hybrids – in same way slight crosses aids fertility in aminals. Eyton's Geese)

[65v]

(a). He shows D. inermis Tatula & Stramonium by perfect fertility of offspring are mere varieties of each other. – important to find out what species there are, –

Dic. Class. says D. Tatula originally from India, & Loudon says N. America & since almost naturalised in Europe. is intermediate between D stramonium & D. fastuosus (from Egypt)

Says. D. ferox very like to D. stramonium.

But these two are sterile together. –

See Gaertner on Datura Stramonium & tatula & laevis being distinct from the great distinctness of their Hybrids. – p 273 important

p. 385 on number of seeds. –

Nmber of seed of D. laevis not given.

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p. 304. D. inermis ♀
D. stramonium ♂. Britain
quite fertile

Hybrids have germinated intermediate between parent "est in summa grada faecundae". Hence infers not true species.
Inverse, gave plants quite similar & fecundissimae with 400 to 500 seeds in each capsule. – & even more.

p. 305. D. ferox ♀ China H.
D. stramonium ♂. Britain

Hybrids intermediate between parents "& notabiliter diminutam faecundatem monstrabant." – Doubts not the inverse would have succeeded, because he has shown by experiment in his 2d. Fortset. p. 125 Pamphet, that D. Tatula is large variety of D. stramonium, & quite fertile together and
D. Tatula ♀
D. ferox ♂
(on two flowers)

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one capsule of the D. Tatula produced 114. & the second 98 good seed. – Hybrids hence produced (& from inverse experiment given in his pamphet) both in form & colour, & in diminished faecundity were altogether similar. –

A vast number of failed experiments in Datura. Atropa Hyosciamus Nolana. Physalis Solanum Nicotiana given