Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 1/5, 1897

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        <div xml:id="echoid-div76" type="section" level="1" n="47">
          <p>
            <s xml:id="echoid-s1466" xml:space="preserve">
              <pb o="106" file="116" n="116"/>
            Blume hervorragen. </s>
            <s xml:id="echoid-s1467" xml:space="preserve">Nach einer gewiſſen Zeit welken die
              <lb/>
            Staubblätter, verlieren ihre Funktionsfähigkeit und verſchwinden;
              <lb/>
            </s>
            <s xml:id="echoid-s1468" xml:space="preserve">wir ſehen dann allmählich ein fadenförmiges Gebilde aus dem
              <lb/>
            Innern zwiſchen der Krone hervorwachſen, welches die Stelle
              <lb/>
            der Staubblätter einnimmt, aber keinen Staubbeutel trägt. </s>
            <s xml:id="echoid-s1469" xml:space="preserve">
              <lb/>
            Dieſes neue Gebilde ſpaltet ſich bei der Nelke der Länge nach
              <lb/>
            in zwei Teile, die bald auseinanderklaffen und ſich, wenn wir
              <lb/>
            dieſe beiden fadenförmigen Teile nach unten hin verfolgen,
              <lb/>
              <figure xlink:label="fig-116-01" xlink:href="fig-116-01a" number="35">
                <caption xml:id="echoid-caption33" xml:space="preserve">Fig. 33.
                  <lb/>
                a u. b Blüte von Knautia arvensis, c u. d von Valeriana officinalis, ſchwach ver-
                  <lb/>
                größert. a u. b im mänulichen, c u. d im weiblichen Zuſtaude.</caption>
                <variables xml:id="echoid-variables13" xml:space="preserve">a b c d</variables>
              </figure>
            durch einen Griffel mit dem Fruchtknoten verwachſen zeigen:
              <lb/>
            </s>
            <s xml:id="echoid-s1470" xml:space="preserve">ſie geben ſich hierdurch als die Narben zu erkennen. </s>
            <s xml:id="echoid-s1471" xml:space="preserve">Im erſten
              <lb/>
            Stadium befinden ſich die Blumen ſomit im Reifezuſtand der
              <lb/>
            Staubblätter, im zweiten im Reifezuſtand des Stempels; </s>
            <s xml:id="echoid-s1472" xml:space="preserve">wenn
              <lb/>
            die Narben da ſind, fehlen die Staubblätter und umgekehrt: </s>
            <s xml:id="echoid-s1473" xml:space="preserve">
              <lb/>
            eine Selbſtbeſtäubung iſt ſomit gänzlich unmöglich. </s>
            <s xml:id="echoid-s1474" xml:space="preserve">Das
              <lb/>
            Gleiche iſt der Fall z. </s>
            <s xml:id="echoid-s1475" xml:space="preserve">B. </s>
            <s xml:id="echoid-s1476" xml:space="preserve">bei den Malven-Blumen. </s>
            <s xml:id="echoid-s1477" xml:space="preserve">Zuerſt
              <lb/>
            ſehen wir hier im Innern ein Bündel zahlreicher Staubblätter,
              <lb/>
            deren Beutel zu einem Köpfchen zuſammenſtehen, ſpäter ver-
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            welken die Staubblätter, ſie verſchrumpfen und biegen </s>
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