[42]

Marsilea

March 15th. bright night — Thermost —4°C on ground — Plants exposed at 8° 50' taken in in 1°.

219

Ch. V.  [illeg] P. Veris

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— & lastly from these seed 10 8 long-styled & 2 short-styled great-great-great grandchildren (a) which consisted of 8 long-styled & 2 short-styled plants. This latter from leaf In this last generation short-styled plants appeared for the first time due no doubt to atavism, in the course of the about six generations; the plant long-styled plants which was fertilised with pollen from another plant of the same form being connected as the first generation. Their appearance may be attributed to atavism

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& 4 short-styled. So that altogether 162 plants were raised in the from course of the six five generations from the first illegitimately fertilised long-styled cowslips, & its offspring these consisted of 156 long-styled, & only 8 short-styled plants.)

(We will now turn to the fertility & powers of growth passed by the above illegitimate plants. From a short-styled plant, fertilised with its own from pollen,

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[Forms of flowers, pp. 228-9: "From the long-styled form, always fertilised with its own-form pollen, I raised in the first generation three long-styled plants,—from their seed 53 long-styled grandchildren,—from their seed 4 long-styled great-grandchildren,—from their seed 20 long-styled great-great-grandchildren,—and lastly, from their seed 8 long-styled and 2 short-styled great-great-great-grandchildren. In this last generation short-styled plants appeared for the first time in the course of the six generations,—the parent long-styled plant which was fertilised with pollen from another plant of the same form being counted as the first generation. Their appearance may be attributed to atavism. From two other long-styled plants, fertilised with their own-form pollen, 72 plants were raised, which consisted of 68 long-styled and 4 short-styled. So that altogether 162 plants were raised from illegitimately fertilised long-styled cowslips, and these consisted of 156 long-styled and 6 short-styled plants.
We will now turn to the fertility and powers of growth possessed by the illegitimate plants. From a short-styled plant, fertilised with its own-form pollen, one short-styled and two long-styled plants, and from a long-styled plant similarly fertilised three long-styled plants were at first raised."]