The elements of botany for beginners and for schools . are multiplied whilethe petals are left out. Li Buttercups or Crowfoot, while the sepals andpetals conform to the ground-plan of five, both stamens and pistils are indefi-nitely multiplied (Fig. 245). 256. Flowers modified by Union of Parts, so that these parts moreor less lose the appearance of separate leaves or other organs growing outof the end of the stem or receptacle, are extremely common. There are twokinds of such union, namely: — Coalescence of parts of the same circle by their contiguous margins; andAdnation, or the union of adj
The elements of botany for beginners and for schools . are multiplied whilethe petals are left out. Li Buttercups or Crowfoot, while the sepals andpetals conform to the ground-plan of five, both stamens and pistils are indefi-nitely multiplied (Fig. 245). 256. Flowers modified by Union of Parts, so that these parts moreor less lose the appearance of separate leaves or other organs growing outof the end of the stem or receptacle, are extremely common. There are twokinds of such union, namely: — Coalescence of parts of the same circle by their contiguous margins; andAdnation, or the union of adjacent circles or unlike parts. 257. Coalescence is not rare in leaves, as in the upper pairs of Honey-suckles, Fig. 163. It may all the more be expected in the crowded circlesor whorls of flower-leaves. Datura or Stramonium (Fig. 246) shows thiscoalescence both in calyx and corolla, the five sepals and tlie five petals be-ing thus united to near their tips, each into a tube or long and narrow unions make needful the following terms : —. FlQ. 245. Flower Qf RanunQulus bulbosus, or Buttercup, in section- SECTION 8.] MODIFICATIONS OF THE TYPE. 89 Gamopetalous, said of a corolla the petals of which are thus coalescentinto one body, whether only at base or higher. The union may extend tothe very summit, as in Morning Glory andthe lilie (Fig. 247), so that the number ofpetals in it may not be apparent. The oldname for this was Monopetalous, but thatmeans one-petalled; while gamopetalousmeans petals united, and therefore is theproper term. Polypetalous is the counterpart term, todenote a corolla of distinct, that is, separatepetals. As it means many petalled, it isnot the best possible name, but it is the oldone and in almost universal use. Gamosepalous applies to the calyx whenthe sepals are in this way united. Polysepalotts, to the calyx when of sepa-rate sepals or calyx-leaves. 258. Degree of union or of separation indescriptive botany is expressed in the sameway as i
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
