Text-book of structural and physiological botany . FiG. 233.—Caducous calyx Fig. 234.—Longitudinal section through theof poppy. accrescent calyx of Physalts A Ikekengi sur- rounding the fruit. cherry, Physalis Alkekeitgi (Fig. 234), it increases in size [or isaccrescent\ and forms a membranous sack which envelopes The External Form of Plants. 127 the fruit. Sometimes it even takes part in the formation ofthe fruit, as in Ti^apa^ the four horns of the fruit being hereformed by the Hgnification of the calyx-teeth.^ Particularlynoteworthy is the production of the pappus from the limb ofthe calyx.
Text-book of structural and physiological botany . FiG. 233.—Caducous calyx Fig. 234.—Longitudinal section through theof poppy. accrescent calyx of Physalts A Ikekengi sur- rounding the fruit. cherry, Physalis Alkekeitgi (Fig. 234), it increases in size [or isaccrescent\ and forms a membranous sack which envelopes The External Form of Plants. 127 the fruit. Sometimes it even takes part in the formation ofthe fruit, as in Ti^apa^ the four horns of the fruit being hereformed by the Hgnification of the calyx-teeth.^ Particularlynoteworthy is the production of the pappus from the limb ofthe calyx. This peculiar form is especially characteristic ofCompositae ; the calyx continues to grow after the witheringof the corolla, and either a crown of simple hairs ox pilose pap-pus (Figs. 235, 236), or a plumose pappus of branched hairs.
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
