
chhinnagraham

skotlandile aberdeenshayarile prashasthamaaya aadyakaala devonian raini chertle ninnum windifield chertle ninnum vivarichirikkunna shareeraghadanaparamaayi samrakshikkappetta saambilukalil ninnu ariyappedunna lycopodiophyta divisionile vamshanasham sambhavicha vascular sasyangalude oru janussaanu aastaroksilon ("staar aakruthiyilulla sailam"). "aastaroksilon" lycopsidayude adisthaana amgamaayi kanakkaakkappedunnu.
vivaranam.
"devonian kaalaghattatthinte thudakkathil abhivridhi praapicha bhouma rakthakkuzhalukalude oru janussaanu "aastaroksilon". 
12 millimeter vyaasavum 40 centimeter neelavum ulla aakasha, isotomous, anisatomus shaakhakalulla thandukalaanu eee chediyilullathu. cheria vyaasamulla, positteev geotropic root polulla shaakhakal vahikkunna elayillaatha rhizomil ninnaan prokambant eriyal stems uthbhavichath. verukalude swatantra uthbhavathe prathinidheekarikkunna rhizomukal uparithalathinu 20 centimeter vare aazhathil ethi. raini chertle ninnulla 407 dasalaksham varsham pazhakkamulla oru phoosil "dicotomous branching" enna samvidaanathinte parishkaricha pathippiloode roopappetta verukal kaanikkunnu, avide oru kombu polulla achuthandil ninnu roopappetta shaakhakalilonnu mannil kuzhichidunnu. verukalude roopeekaranathinulla eee reethi ippol nilavililla. aakasha thandukalude madhyabhaagathulla sailam allengil contecting tissue cross sekshanil nakshatra aakruthiyilullathaanu, ithu aadyakaala aakttinostel allengil "aastaroksilon" tharam protostel aayi kanakkaakkappedunnu. trackaidukal aadima vaarshika allengil helical tharatthilaanu (jii-type ennu vilikkappedunnu). "elakal"-yadhaartha elakalalla, marichu protressionukal-5 milleemettar vare neelamulla shaakhakalillaatha strap aakruthiyilulla eneshanukalude roopathilaayirunnu; oro eneshanteyum adiyil avasaanikkunnathinaayi kaandatthinte madhyabhaagathulla pradhana bundle ninnu shaakhakalulla orotta vascular trace. enationukalum achuthandukalum stomaatta vahikkunnu, ithu avayude tissukalkku prakaashasamshleshanathinu kazhiyumennu soochippikkunnu.
"vrukkayude aakruthiyilulla rund vaalvukal adangiya sporanchia, nonvascularised ila polulla anubandhangalkkidayil chitharikkidakkukayum oru cheria pedical upayogichu achuthandil gadippikkukayum cheiyunnu. sporanchia valanjathum achuthandinu aduthaanu."achuthandukalude phalabhooyishtamaaya pradeshangal vandhyamaaya pradesangalumaayi marimari varunnu, ithu prathyulpaadanakshamathayude aanukaalika episodukal soochippikkunnu.
"aastaroksilon" drepanophycus, baragwanathia thudangiya samanamaaya mattu aadyakaala devonian lycopsidukalil ninnu vyathyasthamaan, eee randaamathe sasyangalile eaka rakthakuzhal ilayude adayaalam ilayilekku vyaapikkunnu. athinaal "drepanophycus", "baragwanathia" ennivayude elakal yadhaartha microfilukalaayo allengil cheria elakalaayo kanakkaakkappedunnu.
speeshees.
aastaroksilon makkee" aanu eee inam. aastaroksilon elberfeldense" enna mattoru inathe vivarichittundenkilum ithu ippol pothuvaayi vyathyasthamayi kanakkakkappedukayum "thursophyton" aayi nischayikkappedukayum cheiyunnu. aastaroksilon setcheli" ennu aadyam peritta oru phoosil ippol oru fernai kanakkaakkappedunnu, ithu "stenocolios setcheli" ennariyappedunnu.
vargeekaranam.
2021 leeii oru punarvishleshanathil "chhinnagraham" kooduthal basel sosterophilukalekkalum "nottiya" yekkaalum kireedam lycophyteukalumaayi kooduthal adutha bandhamullathaanennu kandethi.

