The elements of botany for beginners and for schools . single plant is all themore speedily converted into a multitude. Whereas, when the subterra-nean parts are only roots, cutting away the stem completely destroysthe plant, except in tlie rather rare cases where the root freely producesadventitious buds. 106. Rootstocks are more commonly thickened by the storing up ofconsiderable nourishing matter in their tissue. The common species otIris (Fig. 164) in the gardens have stout rootstocks, which are only partlycovered by the soil, and which bear foliage-leaves instead of mere scales,closely co
The elements of botany for beginners and for schools . single plant is all themore speedily converted into a multitude. Whereas, when the subterra-nean parts are only roots, cutting away the stem completely destroysthe plant, except in tlie rather rare cases where the root freely producesadventitious buds. 106. Rootstocks are more commonly thickened by the storing up ofconsiderable nourishing matter in their tissue. The common species otIris (Fig. 164) in the gardens have stout rootstocks, which are only partlycovered by the soil, and which bear foliage-leaves instead of mere scales,closely covering the upper part, while the lower produces roots. As theleaves die, year by year, and decay, a scar left in the form of a ring marksthe place where each leaf was attached, that is, marks so many nodes,separated by very short internodes. 107. Some rootstocks are marked with large round scars of a different Fig. 98. A piece of tlie running rootstock of the Peppermint, with its node orjoint, and an axillary bud ready to grow. 44 STEMS. [SECTION 6,. sort, like those of the Solomons Seal (Fig. 99), which gave this name tothe plant, from their looking somewhat like the impression of a seal upon wax. Here therootstock sends upevery spring anherbaceous stalk orstem, which bearsthe foliage andflowers, and diesin autumn. Theseal is the circular scar left by the death and separation of the base of the stout stalk from theliving rootstock. As but one of these is formed each year, they markthe limits of a years growth. The bud at the end of the rootstock in thefigure (which was taken in summer) will grow the next spring into thestalk of the season, which, dying in autumn, willleave a similar scar, while another bud will be formedfarther on, crowning the ever-advancing summit orgrowing end of the stem. 108. As each years growth of stem makes itsown roots, it soon becomes independent of the olderparts. And after a certain age, a portion annuallydies off behind, about as fast as it increa
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
