Organography of plants, especially of the archegoniatae and spermaphyta . the leaf-structures of theflowers and the bracts, bears thefollowing organs:— (a) foliage-lcavcs, [b) tubes (tubular leaves) whichend in insect-traps (bladders), {c) elongated, but unbranchedand non-tubular, thin structuresresembling roots, which we shallcall leaf-roots or rJiizoids. The leaf-roots enter the moistsoil like the tubes; the foliage-leaves raise themselves above then the double function oftrapping animals and of anchor-ing and absorbing water for theplant, which is performed by thetubular leaves of
Organography of plants, especially of the archegoniatae and spermaphyta . the leaf-structures of theflowers and the bracts, bears thefollowing organs:— (a) foliage-lcavcs, [b) tubes (tubular leaves) whichend in insect-traps (bladders), {c) elongated, but unbranchedand non-tubular, thin structuresresembling roots, which we shallcall leaf-roots or rJiizoids. The leaf-roots enter the moistsoil like the tubes; the foliage-leaves raise themselves above then the double function oftrapping animals and of anchor-ing and absorbing water for theplant, which is performed by thetubular leaves of Genlisea, is dis-tributed between two organs, thetubes and the leaf-roots. Thesestand near one another; they areboth transformed leaves. The stalk-portion of the tubular leaf resemblesvery much the leaf-root, and notinfrequently there is found at theend of the stalk an elongated leaf-structure, which one might at firstmistake for a leaf-root instead of a tube - (Fig. 170). Now the trans-formation of leaves into tubes is known elsewhere, it is therefore not specially. Fig. 169. Genlisea violacea. i, seedling with threeleaves ; P\^ first foliage-leaf; 5, incipient tubular leaf ;V, vegetative point; rf-7;, root-hair. 2, older seedlingwhich has formed a number of foliage-leaves, and twotubular leaves, 6^1 ^j, which liave pierced the soil; JJ^terminal inflorescence. ;^, the same seedling older. Asecond inflorescence is developing at the base of the firstone. 4, portion of an inflorescence with vegetative shoot,the young two-armed tubular leaves point , natural size. The others magnified. ^ For the relationships of configuration in Utricularia, see Goebel, Uer Aufbau von Utricularia,in Flora. l.\xii (1S89) ; id., Morphologische und biologische Studien : S. Utricularia, in Annales duJardin botnnique do Buitenzorg, ix (1891); id., Itlanzenbiologische Schilderungen, ii (1S93). Thesimply organized Utricularia Hookeri was unknown to me at the time of my earlier investigation
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