Search

On the typification of Allium lehmannii Lojac. (Alliaceae), a good species for Sicily and Calabria. - The comparison of the type-specimen of Allium pallens L. subsp. siciliense Stearn., Ann. Mus. Goulandris, 4: 161 (1978) preserved at Vienna (WU) and of the type-specimen of Allium lehmannii Lojac., Fl. Sic., 3: 114 (1909) found at Palermo (PAL) and here designated, allows us to regard the two taxa as related to the same entity. In the authors' opinion Allium lehmannii Lojac. is to be considered as a good species. Its distribution for Sicily (living and dried specimens) and for Calabria (a single dried specimen from Sila) is outlined. A description, chromosome number (2n = 16) and some other general informations are also pointed out.

Rhamnus lojaconoi, a new endemic species of Sicily. – The new species Rhamnus lojaconoi, occurring in the mediterranean-temperate forest of the Madonie (Northern Sicily) and probably a relict element connected with R. glandulosa Ait., endemic on the Atlantic Islands and living in similar habitats, is described. The taxonomic arrangement, the genetic interpretation and the ecology are also discussed.

Some aspects of lacustrine vegetation in the central Sicily.—The Authors give a short comparative survey of some hydrophytic facies observed in two small ponds near Caltanissetta, in the central Sicily. In addition to the classical zonation, typical of such water logged (or: swamp) biotopes, a Potamogeton pectinata-Chara vulgaris association is described. The presence of monospecific facies to be referred to the Lemnetum gibbae (Koch, 1954) Miyaw. et J. Tx., 1960 is ultimately reported.