. The elements of structural . of the Crab-Applo(Fig. 4G), isin most re-spects, likethat of Sweet-Brier. Thecalyx is gam-osepalous, itsparts beingunited belowinto a corolla isof five separ- Fig. 47. s-1 ELEMENTS OF STRUCTURAL BOTANY. ate petals. The stamens are numerous and are insertedon the calyx. The structure of the pistil (Figs. 47, 48), however, issomewhat different. On making a cross-section throughthe young apple, five cells containing the unripe seedsare seen radiating from the centre. These seed-vesselsare imbedded in a fleshy mass, the outer limit of whichis mark
. The elements of structural . of the Crab-Applo(Fig. 4G), isin most re-spects, likethat of Sweet-Brier. Thecalyx is gam-osepalous, itsparts beingunited belowinto a corolla isof five separ- Fig. 47. s-1 ELEMENTS OF STRUCTURAL BOTANY. ate petals. The stamens are numerous and are insertedon the calyx. The structure of the pistil (Figs. 47, 48), however, issomewhat different. On making a cross-section throughthe young apple, five cells containing the unripe seedsare seen radiating from the centre. These seed-vesselsare imbedded in a fleshy mass, the outer limit of whichis marked by a circle of green dots, and outside thesedots is the flesh which constitutes the eatable part ofthe apple. The inner mass, whichencloses the core, belongs to the re-ceptacle, whilst the outer edible por-tion is the enlarged calyx. At the endopposite the stem will be found thepersistent calyx-teeth. We have inthis flower, therefore, a sij7icarpoitspistil of five carj)els, instead of anapocarpous one, as in Sweet-Brier. Fig. 48. ORGAN. NO. COHESION. ADHESION. HEMABES. 5 Gamosepalous Superior. 5 Polyiietalous. Superior. Stamens. a: Polyandrous. Perigynous. 1 5 Syncarpous. Inferior. Fruit consistschiefly of aflesLy enlarge-ment of tiioCalyx-tube. ELEMENTS OF STRUCTURAL T50TANY. 85 CHAPTER VI. EXAMINATION OF A PLANT WITH KPIGYNOUS STAMENS WATER PARSNIP. iC. W^ater-Parsnip. This is a common swampplant in Canada ; but if any cliOi-culty be expciiencecl in procuringsj)ecimens the flower of the com-mon Carrot or Parsnip may besubstituted for it, all these plantsbeing closely related, and differ-ing but slightly in the structureof their flowers. Notice first the peculiar ap-pearance of the flower cluster.(Fig. 49.) There are severalFig. 40. pedicels, nearly of the same radiating from the end of the peduncle,and from the end of each pedicel radiate in likemanner a number of smaller ones, each with a flowerat its extremity.
Size: 1384px × 1805px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1879
