Rhywun wedi tynnu fy sylw at ddogfen yn cynnwys hyn:
"Where the undercliff has slipped and is flushed by calcareous run-off northern marsh-orchid Dactylorhiza purpurella and grass of Parnassus Parnassia palustris may be found"
a "Common reed Phragmites australis with associated freshwater marsh species forms significant stands in flushed cliff areas."
Felly mae yn swnio fel clogwyn sydd â dŵr yn golchi drosti. A oes term?
Diolch
Siân
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