Adiantum denticulatum Burm. f.

Mazumdar, Jaideep & Callmander, Martin W., 2018, Lectotypification of the N. L. Burman’s fern name Adiantum denticulatum, Candollea 73 (2), pp. 217-220 : 218

Adiantum denticulatum Burm. f. , Fl. Ind.: 236. 1768.

≡ Davallia denticulata (Burm. f.) Mett. ex Kuhn , Filic. Afr.: 27. 1868.

Lectotypus (first step designated by MERRILL, 1921: 333; second step designated here): INDONESIA. Java: s.d., Pryon s.n. (G-PREL [ G00800170 ]!) . Syntypus: INDONESIA. Java: s.d., Pryon s.n. (G-PREL [ G00800169 ]!).

Notes. – Davallia denticulata has been considered as widely distributed from Africa to the Pacific Islands, including the Indian Ocean islands, India, Southeast Asia and Australia ( VERDCOURT, 1999; NOTEBOOM, 2013; XING et al., 2013). However, recent molecular phylogenetic studies have concluded that the African plants are different and should be named D. chaeropylloides (Poir.) Steud. ( TSUTSUMI et al., 2008, 2016). Therefore, the African and Occidental Indian Ocean Islands plants are treated as a distinct but allied species ( ROUX, 2009; CROUCH et al., 2011; APD, 2018; MADAGASCAR CATALOGUE, 2018) and D. denticulata is restricted to Asia and the Pacific Islands.

In the preface of Flora Indica, N.L. Burman considered Pryon to be “among the most excellent botanists” (see FLORIJN, 1987: 35). Pryon is certainly identical to Franciscus Albertus Prayon, who died in Java in 1765. He was a native of Cologne and travelled to Java on December 1756 for the Dutch East India Company (VOC: Vereenigde Oostindische Compagnie). Correspondence between Pryon and N.L. Burman is kept in the archives of the University of Amsterdam (see VAN STEENIS-KRUSEMAN, 1958).

We designate the sheet G00800170 ( Fig. 1 ) over G00800169, as it represents a more complete specimen and bears the name “ Adianthum [sic!] denticulatum ” in N.L. Burman’s handwriting.

Figures

Fig. 1. – Lectotype of Adiantum denticulatum Burm. f. in G-PREL.