Acrostichum australe L. f.

Callmander, Martin W., Mazumdar, Jaideep & Jarvis, Charles E., 2019, Typification and nomenclature of the western Indian Ocean islands ferns and lycophytes described in Linnaeus filius’s Supplementum plantarum, Candollea 74 (2), pp. 223-234 : 226

Acrostichum australe L. f. , Suppl. Pl.: 444. 1782.

≡ Actiniopteris australis (L. f.) Link , Fil. Sp.: 80. 1841. ( Pteridaceae )

Lectotypus (designated by PICHI-SERMOLLI, 1962: 27): MASCARENES: “31. Acrostichum des Isles de France & de Bourbon ”, s.d., Commerson s.n. ( LINN-HS nº 1622.51 image seen ; isolecto-: MPU [ MPU1071909 ]!, SBT nº 1.2.1.28 image seen) ( Fig. 3 ) .

Notes. – A single specimen of original material is extant in LINN-HS [LINN-HS nº 1622.51]. This specimen bears a label in Thouin’s handwriting including the number “31” to which Linnaeus f. added in his hand “australe ny” (“ny” indicating ‘new’). The LINN-HS specimen was cited as holotype by PICHI-SERMOLLI (1962) and this use is here treated as an error to be corrected to lectotype ( TURLAND et al., 2018: Art. 9.10). Duplicates of this original material have been located in MPU [MPU1071909] and SBT [SBT nº 1.2.1.28]. The identity of the lectotype material corresponds with the current usage of the name.

The type locality is either Mauritius from the “montagne des 3 mamelles et celle du rampart” or “St. Paul” in Réunion as written by Thouin on the MPU specimen ( Fig. 3 ).

Actiniopteris australis is endemic to Mauritius and Réunion in the Mascarenes archipelago ( BADRÉ & LORENCE, 2008).

Figures

Fig. 3. – Isolectotype of Acrostichum australe L. f. in MPU.