Hieracium murorum [subsp. tenuiflorum] var. macrocephalum P.Rossi & Zahn

Fainelli, Federico, Gottschlich, Günter & Orsenigo, Simone, 2024, Nomenclatural notes on some names in the Hieracium tenuiflorum group (Asteraceae) of the Alps, Phytotaxa 645 (2), pp. 131-148 : 136

10. Hieracium murorum [subsp. tenuiflorum] var. macrocephalum P.Rossi & Zahn in Zahn (1934: 481)

≡ Hieracium murorum [subsp. tenuiflorum var. macrocephalum] forma intermedium Zahn (1934: 481) .

Ind. loc.:—“Alpen von Lecco; Val Ontragno; Val Fraele bei Bormio 12–2000 m; Mendel, Welschnofen, Rollepass; Karer See; Val Grande bei Schluderbach und Tuxer Tal in Tirol; Cadore: Valle Digon bei Padola; Schweiz: Brunnen-Sisikon; Goldauer Bergsturz 540 m (Huber)”.

Type:—[ ITALY. Lombardy, Prov. SO] “ S.Gallo , Fraele 1200–2000, L. Fenaroli ” (lectotype, designated here: TR barcode TR-BOT027324 !) .

Syntype:—[ ITALY. Lombardy, Prov. LC] “ Valletta di Rossana , sopra Maggiana. Lierna , 6 Aug 1923, P. Rossi ” ( PAV-LOM014982 !) .

Remarks:—The form H. tenuiflorum var. macrocephalum f. intermedium was intended as a typical for H. tenuiflorum var. macrocephalum . Zahn (1934) provided only a very short diagnosis “Wie a 1a [referring to H. tenuiflorum var. tenuiflorum f. tenuiflorum ]: Hülle 10 mm ” that distinguished this variety only by the size of the flower heads. In the protologue there are numerous localities from Italy, however, the only collector cited is Huber. We could trace several specimens collected in the Alps of Lecco by P. Rossi and determined by Zahn as H. murorum subsp. tenuiflorum var. macrocephalum , but unfortunately the vast majority of them are severely damaged and capitula are missing, preventing from verifying that they match Zahn’s description. In the Herbarium Fenaroli in TR we trace a specimen, collected in one of the localities cited in the protologue “Val Fraele bei Bormio 1200–2000 m ”, that despite being partly damaged still have some capitula. The specimen bears two labels. One has a statement of the locality (S. Gallo, Fraele 1200–2000 m) and the determination ( H. bifidum ), handwritten by Fenaroli, and at the same label there is a handwritten determination by Zahn ( H. murorum L. ssp. tenuiflorum A-T v. macrocephalum f. intermedium Zahn ). Despite the poor condition of this specimen, we decided to designate it as a lectotype.

Current name:— Hieracium tenuiflorum .