Acrostichum viviparum 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 : 229

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

≡ Asplenium viviparum (L. f.) C. Presl , Tent. Pterid.: 109, tab. 3, fig. 20. 1836 [nom. illeg.] [non Blume, 1828].

Lectotypus (designated here): MASCARENES: “nº 26. Acrostix prolifera seu vivipara des isle[s] de France et de Bourbon ”, s.d., Commerson s.n. ( LINN-HS nº 1629.13 image seen ; isolecto-: MPU [ MPU1036711 ]!, G [ G00341868 , G00341869 ]!) .

= Asplenium daucifolium Lam. , Encycl. 2: 310. 1786.

Lectotypus (designated here): MAURITIUS: “ Isle de France ”, s.d., Commerson s.n. ( MPU [ MPU1034656 ]!) ( Fig. 5 ). ( Aspleniaceae )

Notes. – A single specimen of original material is extant in LINN-HS [LINN-HS nº 1629.23]. This specimen bears a label in Thouin’s hand to which Linnaeus f. added the epithet “vivipara”. This specimen bears the number “26” and is here designated as lectotype. Three duplicates of original material have been located in MPU [MPU1036711] and in G [G00341868, G00341869]. The G duplicates originate from the herbarium of Augustin-Pyramus de Candolle (1778–1841).

The combination of Acrostichum viviparum in the genus Asplenium L. proposed by PRESL (1836) is illegitimate as it is a later homonym of Asplenium viviparum published by BLUME (1828). The correct name is A. daucifolium Lam. published in 1786. LAMARCK (1786: 310) cited in the protologue: “ M. Commerson a trouvé cette plante à l’Isle de France. (v.s. in h. D. Thouin)”. The original material has been located in Thouin’s herbarium in MPU. It bears in Lamarck’s hand: “ daucifolium lam. dict.” ( Fig. 5 ). The type was mistakenly believed to be in P by MORTON (1963). A collection in P-LA [P00564950] cited by TARDIEU-BLOT (2002) as a possible isotype is not considered as original material as it was determined as “Darea” by Lamarck with no direct reference to A. daucifolium except the locality “isle de France”.

Asplenium daucifolium is endemic to Mauritius, Réunion, and Madagascar ( TARDIEU-BLOT, 2002).

Figures

Fig. 5. – Lectotype of Asplenium daucifolium Lam. in MPU.