The principles of biology . the factors is just equal to itswork. And this highest conceivable result must be wroughtout by that same universal process which the simplest inor-ganic action illustrates. THE END. APPENDICES. APPENDIX A. SUBSTITUTION OF AXIAL FOR FOLIAR ORaANS IN PLANTS. I APPEND here the evidences referred to in §190. ^e mostnumerous and striking I have met with among the having the alleged implication, are frequent in, thecommon Cow-]Parsnep—so frequent that they must be familiar tobotanists; and vrild Angelica supplies many over-developments of-like m
The principles of biology . the factors is just equal to itswork. And this highest conceivable result must be wroughtout by that same universal process which the simplest inor-ganic action illustrates. THE END. APPENDICES. APPENDIX A. SUBSTITUTION OF AXIAL FOR FOLIAR ORaANS IN PLANTS. I APPEND here the evidences referred to in §190. ^e mostnumerous and striking I have met with among the having the alleged implication, are frequent in, thecommon Cow-]Parsnep—so frequent that they must be familiar tobotanists; and vrild Angelica supplies many over-developments of-like meaning. Omitting numerous cases of more or less significance,I will limit myseH to two. One of them is that of a terminal umbel, in which nine of the ontetmnbellules are variously transformed—^here a single flower being mademonstrous by the development of some of its members into buds;there several such malformed flowers being associated with rays thatbear imperfect umbellules; and elsewhere, flowers being replaced by. umbellnles: some of which are perfect, and others imperfect only inthe shortness of the flower-stalks. The annexed iPig. 69, Represent-ing in a somewhat conventionalized way, a part of the dried spera- 512 men, will give an idea of this Angelica. At a is shown a singleflower partially changed; in the nmbellnle marked h, one of therays bears a secondary umbellule; and there may be seen at c andd, several such OTer-developments. But the most conclusive instance is that of a Cow-Paxsnep, in whicha single terminal umbel, besides the transformations already men-tioned, exhibits higher degrees of such transformations.* The com-ponents of this complex growth are;—^three central umbellules, ab-normal only in minor points ; one umbellule, external to these, whichis partially changed into an umbel; one rather more out of thecentre, which is so far metamorphosed as to be more an umbel thanan mnbellule: nine peripheral clusters formed by the developmentof umbellules i
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectbiology, bookyear1864
