TWO LINEAGES. “Plants evolved leaves on at least two independent occasions and the legacy of these historic evolutionary events is represented in extant floras by microphylls in lycophytes (clubmosses, spikemosses and quillworts) and megaphylls in euphyllophytes (ferns, gymnosperms and angiosperms).”
http://aob.oxfordjournals.org/content/96/3/345.full.pdf
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022