. Elementary botany . Fig. 63. Foliose liverwort ^Bazzania) showing dichotomous branching and overlapping leaves. 172. Members of the plant body.—In the higher plants there is usually great differentiation of the plant body, though in many forms, as in the duck- weeds, it is a frond. While there is great variation in the form and func- tion of the members of the plant body, they are reducible to a few fundamental members. Some reduce these forms to three, the root, stem, and leaf, while others to two, the root and shoot, which is perhaps the better arrangement. Here the shoot is farther divide
. Elementary botany . Fig. 63. Foliose liverwort ^Bazzania) showing dichotomous branching and overlapping leaves. 172. Members of the plant body.—In the higher plants there is usually great differentiation of the plant body, though in many forms, as in the duck- weeds, it is a frond. While there is great variation in the form and func- tion of the members of the plant body, they are reducible to a few fundamental members. Some reduce these forms to three, the root, stem, and leaf, while others to two, the root and shoot, which is perhaps the better arrangement. Here the shoot is farther divided into stem and leaf, the leaf being a lateral outgrowth of the stem. The different forms of the members are usually des- ignated by special names, but it is convenient to group them in the single series. Examples are as follows: 173. Stem series. Tubers, underground thickened stems, bearing buds and scale leaves; ex., Irish potato. Root-stocks, underground, usually elongated, bearing scales or bracts, and a leafy shoot; trillium, mandrake, etc. Root-stocks of the ferns bear expanded, green leaves. Runners, -lender, trailing, bearing bracts, and leafy stems as branches; ex., strawberry vines. Conns, underground, short, thick. Leaf bearing and scale bearing; ex., In- dian turnip.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
