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10 Giardina & al.: A catalogue of plants growing in Sicily

Campanula marcenoi Brullo in Candollea 48(2): 494 (1993); “C. rotundifolia” sensu
Guss. (1827); C. linifolia Lojac. (1903) non Scop.].
Populations of C. scheuchzeri occurring in S.-Italy and in Sicily have for a long time
been considered as an effect of the glacial process in the Mediterranean. The Sicilian
population is isolated on the dolomitic slopes of the Madonie Mountains and on the
other land clearly shows relationships with C. scheuchzeri s. str. in S. Europe. It can
be adequately placed at subspecific rank alike for Bernardo & al. proposed for C.
pollinensis occurring in the Southern Apennines.
Carduus pycnocephalus subsp. intermedius (Lojac.) Giardina & Raimondo stat. nov.
[Bas. Carduus intermedius Lojac., Fl. Sic. 2(1): 167 (1903)].

Celtis tournefortii subsp. aetnensis (Tornab.) Raimondo & Schicchi stat. nov. [Bas. Celtis
tournefortii var. aetnensis Tornab. in Atti Accad. Gioenia Sc. Nat. Catania ser.2, 11:
3 (1856).
Celtis tournefortii subsp. asperrima (Lojac.) Raimondo & Schicchi comb. & stat.
nov.[Bas. Celtis asperrima Lojac., Fl. Sic. 2(2): 355 (1904)].
According to Strobl (1880) and Lojacono (1904) two independent species, Celtis aet-
nensis and C. asperrima are found in Sicily instead of C. tournefortii s. str., which is
absent there. C. aetnensis mainly occurs on the volcanic soils of Mt. Etna and - rather
rare and scattered – in the close-by Nebrodi Mountains, NE-Sicily). C. asperrima,
which is often included in C. tournefortii s.str., occurs scattered especially in the
Sicani mountains and on the Busambra Rock (W Sicily), usually on limestone.
Although genetically very similar, as evidenced by De Castro & Maugeri (2006),
these taxa are nevertheless distinct as far as phenotypical features, ecology and dis-
tribution are concerned.

Centaurea gussonei Raimondo & Spadaro stat. & nom. nov. [Based on C. parlatoris var.
tomentosa Guss., Fl. Sicul. Syn. 2(1): 510 (1844), non C. tomentosa Salisb. 1796
nom. illeg.; C. dissecta var. tomentosa (Guss.) Fiori in Fiori & Paoletti, Fl. Anal. Ital.
3(2): 336 (1904)].
On the basis of several studies still in progress some new species have recently been
described within the Centaurea parlatoris group. As regards the Gussone’s variety,
it appears as a distinct population of specific rank frequent and quite recognizable,
rather than a hybrid sporadically occurring in the field.
Centaurea todaroi subsp. seguenzae (Lacaita) Giardina & Raimondo stat. nov. [Bas.
Centaurea todaroi fo. seguenzae Lacaita in Nuovo Giorn. Bot. Ital. n.s., 22: 245
(1915); Syn. C. seguenzae Brullo; “C. cinerea” sensu Lojac. solum morphotypus
tyndareus].
Slight morphological differences and the distinct distribution range just account for
the subspecific rank.
Cerinthe major subsp. elegans (Fiori) Giardina & Raimondo stat. nov. [Bas. C. major var.
elegans Fiori, Nuova Fl. Anal. Ital. 2 (2): 267 (1926), based on C. aspera fo. semi-
purpurea Fiori, Fl. Ital. Exsicc.: n. 937 (1908)].