Nrog qhov siab ntawm 2 meters, cov haiv neeg bracken yog ib qho ntawm cov nroj tsuag loj tshaj plaws. Txawm hais tias nws yog tshuaj lom, nws tau siv ntau zaus hauv tshuaj. Yuav kom tsis txhob muaj fern, koj yuav tsum paub tseeb tias nws.
Kuv paub qhov bracken li cas?
Lub bracken fern (Pteridium aquilinum) tuaj yeem lees paub los ntawm nws qhov kev loj hlob zoo siab txog li 2 meters, ntev, lub teeb ntsuab, ntxhib fronds reminiscent ntawm dav dawb hau talons, thiab triple pinnation raws lub hauv paus axis. Cov spores yog nyob rau hauv qhov twisted kawg ntawm fern fronds.
Nkauj hmoob zoo li cas?
Ntxiv rau nws qhov siab, lub bracken fern, Latin Pteridium aquilinum, impressesnrog nws ntev, lub teeb ntsuab, ntxhib fronds Cov npoo ntawm fern fronds dai tshaj me ntsis thiab curl li. Cov dov kawg ua rau cov nplooj reminiscent ntawm dav dawb hau talons. Qhov no yog qhov uas cov nroj tsuag tau txais nws lub npe bracken. Cov nplooj ntawm fern yog pinnate, piv txwv li muab faib los ntawm lub hauv paus axis. Cov fronds ntev txog 4 meters thiab nkhaus downwards.
Kuv paub qhov bracken li cas?
Koj tuaj yeem lees paub lub bracken fernlos ntawm nws qhov siab zootab sis kuj los ntawm nws cov fronds. Hom fern feem ntau loj hlob mus txog 90 cm thiab yog li ntawd me dua li bracken. Tsis tas li ntawd, koj tuaj yeem txheeb xyuas ferns los ntawm cov duab ntawm fronds. Thaum nthuav tawm, cov no tsim ib daim duab peb sab loj, dav ntawm lub bracken. Cov nroj tsuag no feem ntau muaj triple pinnation vim cov ceg ntoo ntawm sab hauv nruab nrab.
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Qhia bracken los ntawm nws cov spores
Zoo li feem ntau ferns, bracken tsis paj tab sis tsim spores. Nyob rau hauv hom no cov spores nyob rau hauv thiaj li hu ua sporangia. Koj tuaj yeem paub txog bracken vim tias cov spores feem ntau nyob hauv qhov sib tw kawg ntawm fern fronds. Cov spores tseem tiv thaiv los ntawm daim ntaub thaiv zoo.
