Phagnalon ×saxatiliforme Sennen (1929: 44)

Montes-Moreno, Noemí, Garcia-Jacas, Núria, Nualart, Neus, Susanna, Alfonso & Sáez, Llorenç, 2018, Typification of plant names referable to Phagnalon (Compositae) with some taxonomic notes, Phytotaxa 360 (1), pp. 1-18 : 13

Phagnalon ×saxatiliforme Sennen (1929: 44)

Type:—[ SPAIN.] Barcelona, massif du Tibidabo vers Belesguart [ Belesguard ], 7 May 1922, Sennen 4432 (lectotype: BC-SENNEN barcode BC945731 !, designated here; isolectotypes: BC barcode BC31426 !, BM!, Herb. F. Sennen II number 12605!, MA numbers MA124763 ! and MA124764 !) .

(Image available at: http://www.ibb.csic.es/herbari/ JPEG / BC 945731.jpg).

= Phagnalon × intermedium (Lag.) Pau (1931: 51) [ Ph. rupestre (L.) DC. × Ph. saxatile (L.) Cass.]

Notes:—The locality and collector number indicated in the original description refer to northeastern Spain: “Hab. - Barcelone, massif du Tibidabo vers Belesguart [Belesguard]” and “4432”. Sennen indicated that this was a hybrid between Phagnalon saxatile × Ph. rupestre [sub Ph. tenorii ]. We selected as the lectotype the specimen BC-SENNEN 945731 that matches quite well the original description, is kept in Sennen’s personal collection and is in a good state of preservation. We studied the original gathering deposited at BC and verified that the specimens show intermediate characters attributed to hybridization between Ph. rupestre and Ph. saxatile : the outermost and middle involucral bracts wider and obtuse, similar to those of Ph. rupestre , but frequently with undulate margins, like those of Ph. saxatile (see taxonomic notes under C. × intermedia ). However, we observed that the outermost and intermediate bracts were acute in some capitula.