[27]

Celery Heliotropism of Hypocotyl obscure light, Sept 14.

Window Blinds down. + muslin Curtain covered at top & on sides— open to room, Bright morning.

Left Hand Right Hand

Left Hand	Right Hand
8°. 30	8°. 30'
8. 50 from L & to R.	8. 50 to L. & R
9. 17 to Light Day Clouding	9. 17 to L. & little to R
9. 45 straight to L.	9. 45 straight to L.
10. 15 same course (took off muslin & put on towel— sky cloudy, but brighter)	10. 15 same course
10. 50 do	10. 50 do do gone back
11. 24 . do	11. 23 do straight to light
11. 40"— put up muslin with Towel
12 to L & little to R.	12 same course (not distinctly visible)
12. 35 same course	12. 35. do, a little to right
1. 5    do	1 5' to right
1. 32    do (took away towel & left   muslin	1 32 from light
2. 7 same course	2. 7    do
2. 32 do	2. 32 do a little to left
3°    do	3. back to light
3. 53 . do	3. 53 do    do, a
4. 30 do to right & little back (muslin forgotten)	4 30 do same course
5° to right & little back	5°    do
5 30 to left & back, circumnutating	5. 30 off glass
6 back from light	6° . do further off
6°. 30 do	6. 30'    do
7° 15 same course	7. 15 still further off

 

[27v]

are well illustrated by the plants called [cleistogene] which bear on the same stock two kinds of flowers. The flowers of the one kind are minute and completely closed, so that they cannot possibly be crossed; but they are abundantly fertile, although producing an extremely small amount quantity of pollen. The flowers of the other kind produce much pollen and are open; and these can be and often are cross-fertilised. Herman Müller has also made the remarkable discovery that there are some species plants which exist

[Cross and self fertilisation, pp. 3-4: "These remarks are well illustrated by the plants called cleistogene, which bear on the same stock two kinds of flowers. The flowers of the one kind are minute and completely closed, so that they cannot possibly be crossed; but they are abundantly fertile, although producing an extremely small quantity of pollen. The flowers of the other kind produce much pollen and are open; and these can be, and often are, cross-fertilised. Hermann Müller has also made the remarkable discovery that there are some plants which exist under two forms; that is, produce on distinct stocks two kinds of hermaphrodite flowers."]