News
A new locality of Wolffia arrhiza in Croatia
Z. Devidé
; Hrvatska
Abstract
Wolffia arrhiza (L.) W i m m, was found in large masses associated with Spirodella polyrrhiza (L.) S c h l e i d, in an old branch of the river Sava near Zagreb. A precise description of the habitat is given in the above Croatjan text. In the parts of this dead branch, which was totaly dried up during the summer, it was also possible to establish the presence of a great many shoots of Wolffia and Spirodella. In the mud the presence of living shoots of Wolffia and Spirodella could still be found in the depth of nearly 5 cm and even more. Tho shoots of Wolffia were summer and winter shoots as well, but those of Spirodella were' on the contrary exclusively winter shoots.
Wolffia arrhiza (L.) W i m m. was known in Croatia till now only from 3 localities, which all are in the territory of Quarner. The new finding-place, the first in the inner continent of Croatia, represents a connection-point between the localities of Quarner and those of Baika, Panievo (Serbia) and Roumania, thus connects, to a certain extent, the Roumanian-Serbian spreading territory with the Quamerian one. In Slovenia, Austria and Hungaria an occurrence of Wolffia is not known.
Keywords
Hrčak ID:
152656
URI
Publication date:
31.12.1956.
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