
racophytals

racophytals devonian kaal key paudhon kaa ack vilupt samooh haye. 
pratinidhiyon kii visheshta ack advitiya shakha pranali haye jisamen dwi-aur chaturbhuj ikaaiyaan hoti hain joe vishesh sanrachanaon, afflebia key akshon mein sthit hoti hain. yeye furn key raachi parr asamanya parche hain. antim shakha charan key upaangon koo dwi-shaakhiya roop seey kiya jaa sakata haye, kuchh roopon mein way ack tala mein khade hotey hain. samvahani pranali mein ack cross section aur ack secondary zylem key saath ack clapsideroid praathamik zylem hotaa haye. sporangia samoohon mein hotey hain aur unakaa koee vaarshik naheen hotaa haye. sabhi pratinidhi samalingi honey chaahiye.
racophytals kii sateek vargeekaran sthiti abhee bhee spasht naheen haye. "racophyton" koo ateet mein aneurophytal (ack progymnosperm crum) kaa hissa maanaa jaataa thaa, jaba ise beej furn aur vaastavik furn kaa agradoot maanaa jaataa thaa. ise protopteridales, gygopteridales, yaa coenopteridales mein besal samooh mein maanaa jaataa thaa, ack polyphylatic samooh jisamen storopteridales aur gygopteridales bhee hotey hain.
order key pratinidhi eridopteridales aur progymnosperm key kuchh pratinidhiyon key saath visheshtaon koo saajha karate hain. kuchh lekhakon ney unhein zygopteridales, ack jeevaashm furn samooh mein ack parivaar key roop mein rakhaa haye. unake saath, way kaanch key aakar key zylum aur quadriceriot shaakhaon koo saajha karate hain. progymnosperm key saath way maadhyamik zylum saajha karate hain.
teller, teller aur rings (2009) unhein trimrophyta kii tulanaa mein adhik vikasit key roop mein dekhate hain, jisase way utpann hue they, lekin unamen kuchh cumm umr key furn jaise paudhon mein paae jaane vaale anga bhed kii kamee haye.
sandarbh.
thomas aine. teller, edith ell. teller, michael ringsah peliyobotni. jeevaashm paudhon kaa jeev vigyaan aur vikas. doosara sanskaran, akaadamik press 2009, pee. 401-405.