Type and new combination for Stellaria lanceolata and a new synonymy for S. rotundifolia (Caryophyllaceae)

Three specimens collected by P. Commerson were found within the Caryophyllaceae in the Lamarck herbarium in Paris (P-LA), whose determinations were erroneous or lacking. These specimens were collected apparently in “de magellan” (Strait of Magellan) or in the “Isle de Bourbon” (currently called Réunion Island) between 1767 and 1771. By considering the genus of each plant and the possible site of collection, it could be concluded that: A) the type of Stellaria lanceolata Poir., with locality label “de magellan”, belongs to Cerastium lanceolatum (Poir.) Volponi, comb. nov., and was probably collected in the Mascarene Islands or Madagascar; B) the type of Stellaria rotundifolia Poir., also with locality label “de magellan”, belongs to Drymaria cordata (L.) Willd. ex Roem. & Schult., and was probably collected in some locality from Tahiti to Sumatra and Java Islands; and C) the specimen without previous determination and having two locality labels, “de magellan” and “Isle de Bourbon”, belongs to Stellaria mannii Hook.f., and was probably also collected in the Mascarene Islands or Madagascar.