[30]

Cassia pubescens circumnutation of young leaf

[annotated diagram] Cassia pubescens

[31v]

[page not in Darwin's hand]

23

634

Chap. 10

Papaver somniferum (Papaveraceæ). Thirty capsules from uncovered plants yielded 15.6 grains weight of seed, and 30 capsules from covered-up plants, growing in the same bed, yielded 16.5 grains weight; so that the latter plant were more productive than the uncovered. Prof. H. Hoffmann (Speciesfrage 1875. p. 53) also found this species self-fertile when protected from insects.

Papaver vagum (d:˚), produced late in the summer plenty of seeds which germinated well.

Papaver argemonoides (d˚)

Glaucium luteum (d˚)

Argemone ochrolenca (d˚)} According to Hildebrand (Jahr. Wissen. Bot. BVIII p. 466) sno conspicuous infertility is caused by spontaneously self-fertilisation  spontaneously self-fertilised flowers are by no means sterile.

Adlumia cirrhosa (Fumariaceæ) sets an abundance of capsules.

[Cross and self fertilisation, pp. 365-6.]

Hypecoum procumbens (d˚) Hildebrand says (2d dem) Jahr J. Botanik VII p. 464) "ein garten with respect to protected flowers, "Ein gute Fruchtbidung eintrette."

[Cross and self fertilisation, p. 331: "Fumariaceous genus, Hypecoum, Hildebrand observed that H. grandiflorum was highly self-sterile, whilst H. procumbens was fairly self-fertile. ('Jahrb. für wiss. Botanik' B. 7 page 464.)"]