The natural history of plants, their forms, growth, reproduction, and distribution; . causethe water to travel, not to the basal part, but to a spot on the margin whencej it will detach itself in the form of a drop, and fall upon the leaves situatedI immediately below and at a greater distance from the axis. A striking contrast to these trees and shrubs, climbing and trailing plants,and sufFruticose and herbaceous species, with their absorptive roots lying in oneplane, and usually spreading at but little depth, is afforded by plants which possess 94 RELATIONS OF FOLIAGE-LEAVES TO ABSORBENT ROO


The natural history of plants, their forms, growth, reproduction, and distribution; . causethe water to travel, not to the basal part, but to a spot on the margin whencej it will detach itself in the form of a drop, and fall upon the leaves situatedI immediately below and at a greater distance from the axis. A striking contrast to these trees and shrubs, climbing and trailing plants,and sufFruticose and herbaceous species, with their absorptive roots lying in oneplane, and usually spreading at but little depth, is afforded by plants which possess 94 RELATIONS OF FOLIAGE-LEAVES TO ABSORBENT ROOTS. bulbs or short root-stocks with deep-reaching suction-roots, and those which havetap-roots descending vertically in continuation of the main stem, and whose second-ary roots are short and travel only a little distance from their places of other extreme in root-structure, which is represented in fig. 13-, has itscounterpart above-ground in the form and direction of the laminae upon whichthe rain falls. In all these plants the surfaces of the leaves are not directed.


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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1902