Organography of plants, especially of the archegoniatae and spermaphyta . ba according to Sonntag, Uber Dauer des Scheitelwachsthums und Entwicklungs- \ geschichte des Blattes, in Pringsheinis Jahrbiicher, xviii (1887), p. 247. * See Part I, p. 127. 332 LEAF DEVELOPMENT IN PTERIDOPHYTA AND SPERMOPHYTA site to them. I regard the small pinnules as i-cduccd leaflets of the firstorder, probably the result of correlation, but not as intercalated new forma-tions as has been assumed. For this interpretation^ we have support inthe fact that these interposed leaflets may be entirely absent in feeblydev
Organography of plants, especially of the archegoniatae and spermaphyta . ba according to Sonntag, Uber Dauer des Scheitelwachsthums und Entwicklungs- \ geschichte des Blattes, in Pringsheinis Jahrbiicher, xviii (1887), p. 247. * See Part I, p. 127. 332 LEAF DEVELOPMENT IN PTERIDOPHYTA AND SPERMOPHYTA site to them. I regard the small pinnules as i-cduccd leaflets of the firstorder, probably the result of correlation, but not as intercalated new forma-tions as has been assumed. For this interpretation^ we have support inthe fact that these interposed leaflets may be entirely absent in feeblydeveloped leaves, for example those of the potato. Relation of the Pinnate to the Digitate Leaf. Relativelysmall differences in the distribution of the growth upon one and the sameprimordium may bring about leaf-forms which are outwardly very us suppose, for example, that on one leaf-primordium there are producedupon each side five lateral primordia. From this would develop a leafwith five marginal projections if the lamina itself is strong in growth and the.
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Keywords: ., bookcentury1900, bookdecade1900, bookido, booksubjectplantanatomy
