. Plant propagation; greenhouse and nursery practice. difficult to ship inthe seed form and shipping these either actively growingin wardian cases or dormant as nursery stock. Theformer method is not much practiced; the latter is thefavorite method of nurserymen. 27. The rest period of seeds is that interval betweenthe apparent maturity of the seeds upon the parent plantand the time when the seeds will germinate under con-ditions normal to the species. Such seeds apparentlycannot be made to sprout earlier. Amajority of garden seeds will sproutwithin a month of the time they mature ;a few almos
. Plant propagation; greenhouse and nursery practice. difficult to ship inthe seed form and shipping these either actively growingin wardian cases or dormant as nursery stock. Theformer method is not much practiced; the latter is thefavorite method of nurserymen. 27. The rest period of seeds is that interval betweenthe apparent maturity of the seeds upon the parent plantand the time when the seeds will germinate under con-ditions normal to the species. Such seeds apparentlycannot be made to sprout earlier. Amajority of garden seeds will sproutwithin a month of the time they mature ;a few almost without any delay. It is nouncommon thing for seeds of cereals tosprout while still in the head, shouldthe weather be wet for a considerabletime at harvest. The mangrove normal-ly sprouts its seeds while still attachedto the parent plant. The rest period ispot°plunging r^3.\\y a time of chemical change ora, pot in soil, b, dibble, ripening of the foods stored in the may be broken by drying, freezing, chemicals, or byfreezing and INTRODUCTION 15 Howard and Whitten of Missouri planted about ^00 species ofseeds representing 51 genera to determine whether seeds in generalare capable of germinating immediately after ripening if placed infavorable conditions. Seeds of grass, lily, pink, mallow, legume andcomposite families seem to have no rest period, while rose, cashewand vine families have a pronounced one. in general seeds of woodyplants have a more pronounced rest period and are more dif-ficult to force into growth than seeds of vegetable and other her-
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectplantpropagation
