The principles of biology . seaweed of the same genusas one outlined in Fig. 40 ; but of a species in which pro-liferous growth is carried much further. Here, not only doesthe primary frond bud out many secondary fronds from itsmid-rib ; but most of the secondary fronds similarly bud outseveral tertiary fronds; and even by some of the tertiaryfronds, this prolification is repeated. Besides being shownthat the budding out of several fronds from one frond, maybecome habitual; we are also shown that it may become ahabit inherited by the fronds so produced, and also by the THE MOEPHOLOGICAX COMPOS
The principles of biology . seaweed of the same genusas one outlined in Fig. 40 ; but of a species in which pro-liferous growth is carried much further. Here, not only doesthe primary frond bud out many secondary fronds from itsmid-rib ; but most of the secondary fronds similarly bud outseveral tertiary fronds; and even by some of the tertiaryfronds, this prolification is repeated. Besides being shownthat the budding out of several fronds from one frond, maybecome habitual; we are also shown that it may become ahabit inherited by the fronds so produced, and also by the THE MOEPHOLOGICAX COMPOSITION OF PLANTS. 63 fronds th^ produce: the manifestation of the tendency,being probably limited only by failure of nutrition. Tbatunder fit conditions, an analogous mode of growth will occurin fronds of the acrogenic type, like those we set out with, isshown by the case of Jungermcmnia fwrcata. , 46, inwhich such compound proKfication is partially us suppose then, that the frond a, Fig. 106, produces. not only a single secondary frond h, but also another suchsecondary frond, V. Let us suppose, further, that the frond6 is in like manner doubly proliferous: producing both cand c. Lastly, let us suppose that in the second frond Vwhich a produces, as well as in the second frond c which hproduces, the doubly-proliferous habit is manifested. If,now, this habit grows organic—if it becomes, a^ it natur-ally will become, the characteristic of a plant of luxuriantgrowth, the unfolding parts of which can be fed by the un-folded parts; it will happen with each lateral series, as withthe main series, that its successive components will begin toshow themselves at earKer and earlier stages of in the same way that, by dwarfing and generaKzing 64 MORPHOLOGICAL DEVELOPMENT. the original series, we arrive at a stmcture like that of theterminal bud; by dwarfing and generalizing a lateral series,as shown ia Figs. 107—110, we arrive at a structure an-swerin
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectbiology, bookyear1864
