. Elementary botany . Botany. 142 DICOTYLEDONS inserted upon an enlarged fleshy receptacle, to which the calyx {sp) and epicalyx {ep) still adhere. Dissemination.—The fruits are dispersed by birds, which eat the juicy receptacle and incidentally swallow the little dry achenes. These achenes have indigestible hard pericarps, and consequently pass uninjured through the bird's body. Vegetative characters (fig. 54).— Note the "runners," also the stipulate leaves with three leaflets. Types III.: BLACKBERRY {Rubus fruticosus) and RASPBERRY {Rubus idcBus). The flowers (fig. 173) are structu
. Elementary botany . Botany. 142 DICOTYLEDONS inserted upon an enlarged fleshy receptacle, to which the calyx {sp) and epicalyx {ep) still adhere. Dissemination.—The fruits are dispersed by birds, which eat the juicy receptacle and incidentally swallow the little dry achenes. These achenes have indigestible hard pericarps, and consequently pass uninjured through the bird's body. Vegetative characters (fig. 54).— Note the "runners," also the stipulate leaves with three leaflets. Types III.: BLACKBERRY {Rubus fruticosus) and RASPBERRY {Rubus idcBus). The flowers (fig. 173) are structurally very like those of the Strawberry, the only important distinctions being that there is. 173 174 Fig. 173.—Vertical section of flower of Blackberry (in the figure, the terminal part of the receptacle {rp) is drawn more spherical than it is in reality). Fig. r74.—Cross-section of a single ovary of ditto. no epicalyx, and the carpels contain two ovules each (fig. 174). After pollination the behaviour is different, however. The central outgrowth {rp) of the receptacle which bears the carpels does not develop into a large fleshy mass; it remains relatively small. But the carpels enlarge considerably and become one-seeded stone-fruits (drupes), which conceal the receptacular lump in their midst. Thus the fruit (fig. 175) of the Blackberry or Raspberry is compound: it consists of a collection of small stone-fruits (d) inserted upon a receptacle which bears'also a persistent calyx {sp). Dissemination.—The. 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 Groom, Percy, 1865-1931. London : G. Bell
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1898
