. The origin of floral structures : through insect and other agencies. Plants; Flowers; Flowers. THE PEINCIPLE OF COHESION. 77 features â when they first cease to be axial and become appen- dicular. The accompanying diagrams (Fig. 19), (a) Lysi- niachia nemorum and (&) Primula veris, will illustrate these Fig. 19.âa, Lysimachia nemorum; b, Primula veris, remarks. The sections are taken on planes * where the pistil is emerging from the receptacle; «. represents the sepaline cords ; ab. st. abortive staminal cords ; p. the petal- ine and staminal (combined) ; dorsal carpellary; pi.
. The origin of floral structures : through insect and other agencies. Plants; Flowers; Flowers. THE PEINCIPLE OF COHESION. 77 features â when they first cease to be axial and become appen- dicular. The accompanying diagrams (Fig. 19), (a) Lysi- niachia nemorum and (&) Primula veris, will illustrate these Fig. 19.âa, Lysimachia nemorum; b, Primula veris, remarks. The sections are taken on planes * where the pistil is emerging from the receptacle; «. represents the sepaline cords ; ab. st. abortive staminal cords ; p. the petal- ine and staminal (combined) ; dorsal carpellary; pi. c. placentary cords. A free central placenta may result from the destruction of the septa of an originally axile placenta, as occurs in the CaryophylleoB. Thus, the ten rows of ovules in Lychnis sufficiently indicated their marginal origin. I may add that a careful investigation into the origin and distribution of the cords has convinced me that the axis in flowers of the Caryophylleoe early ceases to take any part in the structure of the pistil. ⢠Tig. a represents a section taken rather lower down than in Fig. i; as the cords in the latter are still nndiSerentiated in Fig. ai â y. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Henslow, George, 1835-1925. New York : Appleton
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Keywords: ., bookcentury1800, bookdecad, booksubjectflowers, booksubjectplants
