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

≡ Lepisorus spicatus (L. f.) Li Wang in Bot. J. Linn. Soc. 162: 35. 2010. ( Polypodiaceae )

Lectotypus (designated by MAZUMDAR, 2016: 218): MAURITIUS: “33. Acrostichum de l’Isle de France ”, s.d., Commerson s.n. ( LINN-HS nº 1642.1 image seen ; isolecto-: MPU [ MPU1238477 , MPU1238486 ]!) .

Notes. – A single specimen of original material is extant in LINN-HS [LINN-HS nº 1642.1]. This specimen bears a label in Thouin’s hand to which Linnaeus f. added the epithet “spicatum”. This specimen bears the number “33” and was designated by MAZUMDAR (2016: 218) as lectotype. Two collections representing duplicates of original material have been located in MPU [MPU1238477, MPU1238486] and are considered as isolectotypes. Those two specimens bear the number “32” which is an error for “33” (see Fig. 1 ). Other Commerson collections are extent in G [G00348187], P [P00482674], and P-JU [P00674763]. The identity of the lectotype material corresponds with the current usage of the name.

Lepisorus spicatus is known from continental Africa ( Ivory Coast, Cameroun, and Gabon), São Tomé and Príncipe, the Comoro islands, Mauritius, Réunion, the Seychelles islands and Madagascar ( BADRÉ, 2002a).

Figures

Fig. 1. – Manuscript list in Linnaeus filius’s hand dated 20 February 1780 associated with Thouin’s numbering entitled “Plantae missae Sonneratii” including the seven new fern and two lycophyte species from the western Indian Ocean islands described by Linnaeus f. in Supplementum plantarum. [MS 2081, p. 23 front and back; © Muséum national d’Histoire naturelle, Bibliothèque centrale, Paris]