. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. BOG-PLANTS which is, however, prolDably an outcome of complex causes. Excellent examples are furnished by the Cotton Grass [Erio- phormn), the Rush (cf. p. 165), and the Bulrush [Scirpus), all typical of such The principal feature reminiscent of aquatics is the vast system of intercellular air-canals which serves to supply the vuiderground organs with oxygen. The numerous examples cited in this chapter have shown that specialised structure and habitat often go hand in hand. Thus the plants o
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. BOG-PLANTS which is, however, prolDably an outcome of complex causes. Excellent examples are furnished by the Cotton Grass [Erio- phormn), the Rush (cf. p. 165), and the Bulrush [Scirpus), all typical of such The principal feature reminiscent of aquatics is the vast system of intercellular air-canals which serves to supply the vuiderground organs with oxygen. The numerous examples cited in this chapter have shown that specialised structure and habitat often go hand in hand. Thus the plants of a salt-marsh are mostly succulents, those of a desert often have small leaves or assimilating stems, many heath-plants have rolled or hairy leaves, whilst those of a wood. Fig. 95.—Transverse section of Clover-stem (CI.) showing penetrating haustoria (/(.) of Dodder {Cuscuta) [Cii.], whose stem is cut longi- tudinally, v., vascular tissue of Dodder. mostly possess large thin leaf-blades without marked checks to transpiration. Certain types of structure are, moreover, asso- ciated with certain families, as evidenced by the succulence of most members of the .Stonccrop-familj? (Crassulacea;) and Cactus- family (Cactacefe), the small-leaved habit of most plants of the Heather-family (Ericace;e), and the at]uatic character of all members of the Pondweed-fan-iily (Potamogetonacere). Modifications of structure in relation to the special mode of life are also exhil^ited by the pcirasilL's and saprophytes amongst Flowering Plants.^ A striking feature of both is the feeble development of the xylem, no doubt in relation to the reduc- tion of the leaves { in the parasitic Dodder and in the ' Cf. F, & S., pp. T39 et Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Fritsch, Felix Eugene, 1879-; Salisbury,
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpl, booksubjectplants
