Article

The flora of a dam lake and twenty six ditches in the Karditsa Prefecture (Greece) is here reported: 98 taxa of marsh and water plants (1 charophyte, 2 bryophytes, 4 pteridophytes and 91 spermatophytes) were recorded. Eleven taxa (Agrostis stolonifera, Apium nodiflorum, Ceratophyllum demersum subsp. demersum, Cyperus longus, Lythrum salicaria, Mentha spicata, Paspalum paspalodes, Phragmites australis, Rumex conglomeratus, Typha domingensis, Veronica anagallis-aquatica) are the most frequent, inhabiting 21 (-22) ditches. Cardamine matthioli may be considered as new to Greece as no exact locality has been previously reported. 8 taxa (Aster squamatus, Azolla filiculoides, Lemna gibba, Nasturtium oficinale, Potamogeton graminrus, Ranunculus peltatus subsp. saniculifolius and R. sphaerospermus) are recorded as new to Thessalia. Ranunculus peltatus subsp. saniculifolius is also recorded as new for the Greek mainland. Comments are also given on some taxa, most of them having few previous records from Greece.