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A terrestrial hybrid quillwort, Isoetes ×angeloi, hyb. nov., (Isoetaceae) from Sicily
Ist Teil von
Botany letters, 2023-04, Vol.170 (2), p.278-284
Ort / Verlag
Taylor & Francis
Erscheinungsjahr
2023
Link zum Volltext
Quelle
Taylor & Francis Online
Beschreibungen/Notizen
A sterile hybrid between diploids Isoetes gymnocarpa and I. longissima (s.s.) (Isoetaceae) is described from Anguillara, Trapani Province, Sicily, Italy. Although closest in morphology to I. gymnocarpa with which it was growing, the small group of hybrid plants also exhibited features of I. longissima which occurred abundantly within 50 m of the site. In addition to such classic hybrid characteristics as larger plant size (hybrid vigour) and polymorphic, aborted megaspores with ornamentation intermediate between that of the putative parents, the microspores of the hybrid exhibit both the arachnoid ornamentation features of I. gymnocarpa and the echinate features of I. longissima (s.s.). Isoetes ×angeloi, hyb. nov., is the first non-aquatic Isoetes hybrid to be formally described. It is also the first hybrid quillwort to be confirmed from the Mediterranean Basin.