[275]

Mimosa pudica Frank

Hypocotyl secured. Hot House

Seedling mimosas glass filament fixed on cotyledon & foreshortened onto vertical glass— Pots in hot house, filament pointing at light—

Rt hand tracing has only 13 dots as it went off the glass sooner

[Figure]

Times of observation

Nov 13.

1­— 9.25 am

2— 935

3— 10.0

4— 10 52

5— 11 32

6— 12.10

7— 12 45

8— 1 22

9— 1.55 pm

10— 2 37

11 3 12

12 355

12A 4.48

12B 5.55

Nov 14 am

12C 8 15

13— 9.25

Temperature 16-17C

[275v]

92

Ch 3 Pulmonaria

to account for this great discordance in Hildebrand our & mass my results: a best to become equal-styled, so as my plants exhibited no tendency to lose their proper long-styled character, and to become equal-styled, as not rarely happens under cultivation with several heterostyled species of Primula; but it would appear that they had been greatly affected in junction either by long c – continued cultivation or by some other unknown cause. We shall see in a future chapter that dimorphic heterostyled plants illegitimately fertilised during several successive generation sometimes become more self self-fertile; & this may have been the case with my stock of plants the present species of Pulmonaria; but in this case but that we must assume that the long-styled by plants were at first at first sufficiently fertile at first to yield at first some seed, instead of being as to absolutely self-fertile like the German plants.) (Pulmonaria angustifloria — Seedlings of this species plant, raised from plants growing wild in the Isle of Wight, which were named for me by Dr Hooker. This species It is so closely allied to the last species, differing chiefly in the shape & in spotting of the leaves, that the two have been ranked considered

[Forms of flowers, pp. 103-104: "How to account for this wide discordance in our results I know not. Hildebrand cultivated his plants in pots and kept them for a time in the house, whilst mine were grown out of doors; and he thinks that this difference of treatment may have caused the difference in our results. But this does not appear to me nearly a sufficient cause, although his plants were slightly less productive than the wild ones growing on the Siebengebirge. My plants exhibited no tendency to become equal-styled, so as to lose their proper long-styled character, as not rarely happens under cultivation with several heterostyled species of Primula; but it would appear that they had been greatly affected in function, either by long-continued cultivation or by some other cause. We shall see in a future chapter that heterostyled plants illegitimately fertilised during several successive generations sometimes become more self-fertile; and this may have been the case with my stock of the present species of Pulmonaria; but in this case we must assume that the long-styled plants were at first sufficiently fertile to yield some seed, instead of being absolutely self-sterile like the German plants.
Pulmonaria angustifolia.—Seedlings of this plant, raised from plants growing wild in the Isle of Wight, were named for me by Dr. Hooker. It is so closely allied to the last species, differing chiefly in the shape and spotting of the leaves, that the two have been considered by several eminent botanists—for instance, Bentham—as mere varieties.]