Botany

The Different Forms of Flowers on Plants of the Same Species

Primula veris or the cowslip.--Differences in structure between the two forms.-- Their degrees of fertility when legitimately and illegitimately united.--P. elatior, vulgaris, Sinensis, auricula, etc.--Summary on the fertility of the heterostyled species of Primula.--Homostyle...

Chapters

18. Chapter 18

Illegitimate offspring from all three forms of Lythrum salicaria. Their dwarfed stature and sterility, some utterly barren, some fertile. Oxalis, transmission of form to the leg...

16. Chapter 16

Linum grandiflorum, long-styled form utterly sterile with own-form pollen. Linum perenne, torsion of the pistils in the long-styled form alone. Homostyled species of Linum. Pulm...

17. Chapter 17

Lythrum salicaria. Description of the three forms. Their power and complex manner of fertilising one another. Eighteen different unions possible. Mid-styled form eminently femin...

24. Chapter 24

in ‘Act. Acad. St. Petersb.’ 1777 part 2 page 45.--On Euryale ‘Gardener’s Chronicle’ 1877 page 280.) They behave in this manner, apparently as a protection to their pollen, and...

12. Chapter 12

Primula veris or the cowslip. Differences in structure between the two forms. Their degrees of fertility when legitimately and illegitimately united. P. elatior, vulgaris, Sinen...

19. Chapter 19

The essential character of heterostyled plants. Summary of the differences in fertility between legitimately and illegitimately fertilised plants. Diameter of the pollen-grains,...

21. Chapter 21

connected with its lesser perfection, and he judges of perfection by priority of development. He also states that whenever there is a separation of the sexes in an hermaphrodite...

15. Chapter 15

cross perfectly resembling, in a considerable number of important characters, the father alone. It is, therefore, very improbable that a pure cowslip crossed by a primrose shoul...

9. Chapter 9

smaller and less conspicuous flowers are not closed, but as far as the purpose which they serve is concerned, namely, the assured propagation of the species, they approach in na...

14. Chapter 14

both species are heterostyled, their complete fertilisation depends on insects. The cowslip is habitually visited during the day by the larger humble-bees (namely Bombus muscoru...

20. Chapter 20

The conversion in various ways of hermaphrodite into dioecious plants. Heterostyled plants rendered dioecious. Rubiaceae. Verbenaceae. Polygamous and sub-dioecious plants. Euony...

8. Chapter 8

General character of cleistogamic flowers.--List of the genera producing such flowers, and their distribution in the vegetable series.--Viola, description of the cleistogamic fl...

10. Chapter 10

11 page 507 and 1875 page 26. On proterandrous and proterogynous hermaphrodite individuals of the same species, see H. Muller ‘Die Befruchtung’ etc. pages 285, 339.) On cultivat...

23. Chapter 23

General character of cleistogamic flowers. List of the genera producing such flowers, and their distribution in the vegetable series. Viola, description of the cleistogamic flow...

22. Chapter 22

It is a curious fact that in all the foregoing polygamous, dioecious, and gyno- dioecious plants in which any difference has been observed in the size of the corolla in the two...

13. Chapter 13

The oxlip a hybrid naturally produced between Primula veris and vulgaris. The differences in structure and function between the two parent-species. Effects of crossing long-styl...

11. Chapter 11

Again there are plants which produce hermaphrodite and male flowers on the same individual, for instance, some species of Galium, Veratrum, etc.; and these might be called andro...

3. Chapter 3

Linum grandiflorum, long-styled form utterly sterile with own-form pollen.-- Linum perenne, torsion of the pistils in the long-styled form alone.--Homostyled species of Linum.--...

5. Chapter 5

Illegitimate offspring from all three forms of Lythrum salicaria.--Their dwarfed stature and sterility, some utterly barren, some fertile.--Oxalis, transmission of form to the l...

2. Chapter 2

The oxlip a hybrid naturally produced between Primula veris and vulgaris.--The differences in structure and function between the two parent-species.--Effects of crossing long-st...

7. Chapter 7

The conversion in various ways of hermaphrodite into dioecious plants.-- Heterostyled plants rendered dioecious.--Rubiaceae.--Verbenaceae.--Polygamous and sub-dioecious plants.-...

4. Chapter 4

Lythrum salicaria.--Description of the three forms.--Their power and complex manner of fertilising one another.--Eighteen different unions possible.--Mid- styled form eminently...

6. Chapter 6

The essential character of heterostyled plants.--Summary of the differences in fertility between legitimately and illegitimately fertilised plants.--Diameter of the pollen-grain...

1. Chapter 1

Primula veris or the cowslip.--Differences in structure between the two forms.-- Their degrees of fertility when legitimately and illegitimately united.--P. elatior, vulgaris, S...