Contribution to a new vascular flora of Sardinia (Italy): II (31-60)

Following the first contribution for a new, updated, and revised vascular flora of Sardinia, this work adds new data on the distribution of 30 taxa growing in the island. The treated taxa are both native and alien, and are characterised by their rarity, phytogeographical significance, endemicity, conservation issues, or novelty to Sardinia and Italy. These updates result from floristic research mostly conducted in South Sardinia but include several discoveries from the rest of the island. The first report of Commelina erecta, Ficus watkinsiana, Morus kagayamae, Opuntia elatior (casual alien species) in Sardinia is documented here. Additionally, Casuarina glauca and Robinia ×ambigua, are reported for the first time in Italy (casual alien). Moreover, the confirmation of Ajuga chamaepitys subsp. chamaepitys is here provided. Furthermore, new distributional data for 23 taxa, some of which known for their rarity, are gathered. Notably, Elatine hexandra and Cosentinia vellea subsp. bivalens, previously reported only once in recent years, along with Elatine alsinastrum and Halopeplis amplexicaulis, which were indicated only for a few sites. For others, an expansion or an improvement of their distribution range on the island is documented, as for rare endemics including Artemisia campestris subsp. variabilis, Bellium crassifolium, Borago morisiana, Dianthus cyathophorus subsp. cyathophorus, Filago tyrrhenica, Helicodiceros muscivorus, Limonium racemosum, Phleum sardoum, and Torilis nemoralis. New findings are also reported for Asplenium sagittatum, Ludwigia palustris, Malva lusitanica, Mandragora autumnalis, Persicaria decipiens, Piptatherum caerulescens, Rorippa sylvestris subsp. sylvestris, and Veronica anagalloides (rare or scattered native). In addition, new information on the distribution of Artemisia verlotiorum and Lycium ferocissimum (invasive alien species) is here reported. Finally, new data about some of the taxa recorded in the first contribution are added or modified.