Text-book of structural and physiological botany . Fig. 286.—Stages of transition between the petals and stamens of Rosa centifoUa. petals, as is often seen in the shepherds purse. It is alsonot uncommon to find in the same flower a gradual transitionbetween the stamens and petals, as occurs normally inNymph^aceae and Rosa centifoUa (Fig. 286). 142 Structural and Physiological Botany, Fig. 287.—Pistil oflily, with ovary,style, and THE GYN^CEUM OR PISTIL. The Pistil consists, in its most perfect form (Fig. 287), ofthree parts :—the lowermost swollen part, a hollow cavity^^^.r^ containi
Text-book of structural and physiological botany . Fig. 286.—Stages of transition between the petals and stamens of Rosa centifoUa. petals, as is often seen in the shepherds purse. It is alsonot uncommon to find in the same flower a gradual transitionbetween the stamens and petals, as occurs normally inNymph^aceae and Rosa centifoUa (Fig. 286). 142 Structural and Physiological Botany, Fig. 287.—Pistil oflily, with ovary,style, and THE GYN^CEUM OR PISTIL. The Pistil consists, in its most perfect form (Fig. 287), ofthree parts :—the lowermost swollen part, a hollow cavity^^^.r^ containing the ovules, is the ovary \ the middle slenderer part is the style \ and theuppermost usually thicker part is the pistil is composed ofone or more organs of a foliarnature, the carpels; and theirnumber is almost always indi-cated by the seams or sutureson the outside of the knowledge may thus be ob-tained of the constitution oftne fruit, which is often charac-^i?^l7r^?.r.! ^eristic of whole families ofpartly cut through, plants. Thus, from the struc-ture of the legume (Fig. 288) it may be concluded that itconsists of a single carpel; while in the same manner it isseen that the capsule of Colchiciim {¥\g. 289) is composed ofthree carpels. If a suture faces the centre of the flower, it is called theventral suture; while one facing the perianth is called thedorsal suture. It is common for the carpels of which a
Size: 1156px × 2163px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
