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Dvokrpi ginko (Ginkgo biloba L.) in njegov les = Maidenhair tree (Ginkgo biloba L.) and its wood
Torelli, Niko
Ginko je edina preživela vrsta rodu, ki se je komajda kaj spremenil v zadnjih 150 milijonih let in je edini živeči predstavnik debla Ginkgophyta ('živi fosil'). Ginko je dvodomna golosemenka, vendar ...ne tvori storžev. Videti je kot dvokaličniško drevo razen listov, ki imajo dihotomno venacijo. Semenske zasnove so 'gole'. Izjemno mesto med semenkami je tudi v tem, da se oploditev izvede z bičkastimi spermiji. Les je koniferoiden. Traheje manjkajo. Anatomskose zlahka loei od iglavcev po velikih celicah v pramenih aksialnega parenhima, ki vsebujejo kristalne druze. Traheide pri ginku niso oglate kot pri večini konifer, temveč so nekoliko zaobljene. Zato se pojavljajo medcelieni prostori. Stene traheid kasnega lesa niso odebeljene. Les z nizko gostoto je homogen, mehak, svetlorjav in ima svilnat lesk. Je brez črnjave. Poranitvi se pojavi rjav diskoloriran les.
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