The origin of floral structures through insect and other agencies . Fig. 70.—Calyx of Garden Pea, with carpellary lobes (afterMasters). Fig. 71.—Ovuliferoussepal of Violet. Fig. 72.—Corolla of Foxglove, with staminatetube. became curiously coiled and bore pollen within the tissue ofthe coils (Fig. 73). Pistiloid petals are of rare occurrence. As an example isBegonia ( 74, a), in which the apex of the petal wasgreen and stigmatiform, the basal part being broad, coloured,and ovuliferous. Fig. 74, &, shows a petal, ovuliferous below,stigmatiferous at the summit, and antheriferous midway;c is
The origin of floral structures through insect and other agencies . Fig. 70.—Calyx of Garden Pea, with carpellary lobes (afterMasters). Fig. 71.—Ovuliferoussepal of Violet. Fig. 72.—Corolla of Foxglove, with staminatetube. became curiously coiled and bore pollen within the tissue ofthe coils (Fig. 73). Pistiloid petals are of rare occurrence. As an example isBegonia ( 74, a), in which the apex of the petal wasgreen and stigmatiform, the basal part being broad, coloured,and ovuliferous. Fig. 74, &, shows a petal, ovuliferous below,stigmatiferous at the summit, and antheriferous midway;c is a rudimentary ovule. Progressive Changes in the Stamens.—The only change* Journ. Linn. Soc. Bot., vol. xv., p. 86, tab. 3. PROGRESSIVE METAMORPHOSES. 293 that stamens can undergo in this direction is to be moreor less converted into pistillaiy structures. This is bj nomeans uncommon. Either the filament alone, or the antheralone, or both together may be affected. The reader is.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfertili, bookyear1888
