[331]

Fig 37.

[figure pasted on]

Phalaris canariensis

Left Hand Plant

Fig 37. (1/2 scale no lettering)

Tips pointed which use blue mark below

Phalaris canariensis: circumnutation of cotyledon traced on horizontal glass, from 8˚35' a.m. to 8˚. 43 P.m Nov. 16, & position movement next morning shown from 7˚ 25' to 8˚ 45 a.m. ─ Tracing magnified 7 times or 3 1/2 in figure engraved

Fig. 38

[figure pasted on]

Dec 13 Canary-grass ─ seedling about 1/20 High

Traced on Horizontal glass

Fig 38 (1/4 scale no lettering)

Phalaris canariensis: circumnutation of cotyledon of very young seedling, traced on horizontal glass from 11˚ 37' a.m to 9˚30' P.m

again [4 words illeg] under the 1/4 scale

[330v]

73

Ipomoea

consisted in the corolla being irregularly split a little so that it did not open properly, and in with one or two of the stamens being slightly foliaceous, coloured, and firmly coherent to the corolla. I observed this monstrosity in only one flower on the crossed plants. The self-fertilised plants, if well nourished would almost certainly in a few more generations have produced double flowers; for only they had already become in some degree sterile.* (*See on this subject Variation of Animals and Plants under domestication Chapt XVIII 2nd Edit. Vol. II p. 152.)

[in margin:] note

Crossed and self-fertilised plants of the tenth generation (Ipomoea purpurea). Six plants were raised in the usual manner from the crossed plants of the last generation (Tab. 10) again intercrossed, and from the self-fertilised again self-fertilised. As one of the crossed plants in Pot I in the following Table, became much diseased, having coupled crumpled leaves and producing hardly any

[Cross and self fertilisation, pp. 40-41: "The monstrosity consisted in the corolla being irregularly split so that it did not open properly, with one or two of the stamens slightly foliaceous, coloured, and firmly coherent to the corolla. I observed this monstrosity in only one flower on the crossed plants. The self-fertilised plants, if well nourished, would almost certainly, in a few more generations, have produced double flowers, for they had already become in some degree sterile.*
[Table]
Crossed and self-fertilised Plants of the Tenth Generation.—Six plants were raised in the usual manner from the crossed plants of the last generation (Table X.) again intercrossed, and from the self-fertilised again self-fertilised. As one of the crossed plants in Pot I. in the following table became much diseased, having crumpled leaves, and producing hardly any capsules, it and its opponent have been struck out of the table.
* See on this subject 'Variation of Animals and Plants under Domestication' chapter xviii. 2nd edition volume ii. page 152."]