During this period, he again started to become keenly interested in botany and spent time with Francesco Ambrosi, whoever he was, who introduced him to the bryologist Gustavo Venturi and the work of Carlo Vittadini.
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He became a leading specialist in various areas, in which he enjoyed close collaborations: Agaricomycetes, with Quélet and Adalbert Ricken; Aphyllophoromycetideae, with Narcisse Théophile Patouillard and the Canon Hubert Bourdot; and finally Discomycetes with Boudier.
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Giacomo Bresadola (Mezzana, Trento; often given as Giacopo) 14 February 1847 – Trento 9 June 1929) was an eminent Italian mycologist.
Giacomo Puccini | Giacomo Casanova | Giacomo Meyerbeer | Giacomo Manzù | Giacomo Balla | Giacomo Agostini | Giacomo Quarenghi | Giacomo Leopardi | Salvatore Di Giacomo | Laura San Giacomo | Giacomo Matteotti | Giacomo Leoni | Giacomo Manzoni | San Giacomo | Giovanni Giacomo Gastoldi | Gian Giacomo Medici | Giacomo Losi | Giacomo Finetti | Giacomo Facco | Giacomo Bulgarelli | Giacomo Bove | Giacomo | Aldo, Giovanni & Giacomo | San Giacomo Filippo | Giuseppe Giacomo Gambino | Giacomo Vincenti | Giacomo Sannesio | Giacomo Rossi | Giacomo Raffaelli | Giacomo Pacchiarotti |
The type species, Deflexula fascicularis, was originally described in 1901 as Pterula fascicularis by Giacomo Bresadola and Narcisse Théophile Patouillard.