Polypodium glabrum Burm. f.

Mazumdar, Jaideep, Callmander, Martin W. & Fumeaux, Nicolas, 2019, Typification and nomenclature of the ferns described in N. L. Burman’s Flora Indica, Candollea 74 (1), pp. 93-109 : 100

Polypodium glabrum Burm. f. , Fl. Ind.: 235. 1768.

Lectotypus (designated by MERRILL, 1921: 337): INDONESIA. Java: s.d., Pryon s.n. ( G-PREL [ G00800126 ]!) ( Fig. 5 ).

Notes. – Asingle specimen of original material, collected by Pryon in Java, is present in G-PREL [G00800126] ( Fig. 5 ). Afurther Javanese specimen mentioned by Burman as (unnamed) variety could not be traced.

The Pryon specimen was cited by MERRILL (1921: 337) as type. This is regarded as a valid implicit lectotypification.

The Pryon specimen in G-PREL ( Fig. 5 ) clearly represents a species of the genus Nephrolepis Schott . It corresponds to Nephrolepis biserrata (Sw.) Schott , showing glabrous lamina, pinnate fronds, entire margin, pinnae articulate to rachis, hydathodes at vein endings. BURMAN (1768) ’s Polypodium glabrum predates SWARTZ (1801) ’s Aspidium biserratum Sw. In order to allow the further use of a well-known and widely used fern name (A. Smith, pers. comm.) and to avoid disadvantageous nomenclatural changes entailed by the strict application of the ICN rules ( TURLAND et al., 2018: Art. 14.1), a proposal to conserve Swartz’s name over Burman’s is in preparation.

Figures

Fig. 5. – Lectotype of Polypodium glabrum Burm. f. in G-PREL.