... XIII. THE EFFECTS OF STRAINS ON STRUCTURES XIV. ACQUIRED REGULARITY AND "PELORIA" ... LIST OF ILLUSTRATIONS. FIGURE 1. Diagram of a typical flower composed of six whorls PAGE 3 11 15 ... 3. Diagrams of floral æstivations, showing the passage from the two-fifth or quincuncial, to the contorted 4. Diagram of flower of Garidella, with stamens superposed to petals ... ... ... ... 5. Diagram of flower of Helleborus niger with stamens superposed to twenty-one nectaries ... 6. Diagrams illustrating the anatomy of the floral receptacle of a Wallflower, showing the origin of the floral members 39 7. Diagram of the leaf-traces in the stem of Arabis albida 9. Flower of Phyteuma, showing cohesion by contact and congenital, in the corolla 11. Stamens of Centaurea, showing syngenesious anthers; method of fertilisation by "piston-action" (b), nectary and direction of insect-proboscis, etc. ... 413 50 51 12. Anatomy of the floral receptacle of Hellebore, showing the changes in orientation of the cords ... 13. Anatomy of the floral receptacle of Pelargonium, showing changes in the orientation, in the separation and in the union of the cords FIGURE PAGE 68 14. Anatomy of the floral receptacle of Ivy, showing the multiplication and differentiation of the cords, etc. 15. Anatomy of the floral receptacle of Campanula medium, showing the distribution of the cords, etc. (see fig. 8, p. 43) 71 16. Origin and development of the ovule in Beta ... ... 73 ... 75 17. Carpels of Acer, showing the thickened bases, preparatory for ... ... ... ovules 18. A separate carpel of Primula sinensis, with marginal ovules and a "heel-like "" process, the origin of the free central placenta... 19. Anatomy of the floral receptacles of Lysimachia and Primula, showing the cords of five carpels ... 20. Echium, showing declinate stamens and protandrous condition ... 23. Orchis Morio (?), with arrest of pistil, the receptacular tube ... 26. Leaves of Pear with hypertrophied and sub-fasciate petioles 27. Fuchsia with foliaceous sepals, partly detached from the ovary 94 28. Anatomy of the receptacular tube of Prunus, showing the origin of the petaline and staminal cords 29. Part of the receptacular tube of Cherry, showing the distribution of cords in the sepaline lobes. 30. Anatomy of inferior ovary of Alstræmeria, showing the junction between the ovary and the tube 31. Flower of Duvernoia, showing its adaptability for intercrossing 107 32. Flower of Calceolaria, showing thickened ridges, etc., and adaptability for intercrossing... ... 33. Flower of Dictamnus, showing declinate stamens and displacement of petals 34. Flower of Epilobium angustifolium, showing dependent stamens and displacement of petals |