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Oct. 25 /73 — Amongst the Convolvulus plants experimented on last year (72), there was one of the self-fertilised plants. (ie raised from pollen of same flower) which was almost sterile, & the anther contained very little pollen. — It produced a few pods & the seeds were sown (spontaneously fertilised, probably self-fertilised) & this year the 24 pods which first ripened (spont self fertilised, probably self-fertilised) were saved — These yielded on an average only 3.20 seeds per pod (two pods having 6 seeds) & this I think much below average.

There was a second plant, raised from cross by pollen from another flower on the same plant, which was somewhat less sterile & a few seeds were sown in same pot in greenhouse as above, & the 24 pods as above yielded average of 3.96 seeds per pod (with 3 containing 6). So that (put in note) transmitted their degrees of sterility to their offspring— (More pods were produced than the 24 gathered off each lot.)

Proof of inheritance

(Plants grown in greenhouse & therefore probably self-fertilised.)