Ophioglossum zeilanicum Houtt.,

Wijnands, Dirk Onno, Heniger, Johannes, Veldkamp, Jan Frederik, Fumeaux, Nicolas & Callmander, Martin W., 2017, The botanical legacy of Martinus Houttuyn (1720 - 1798) in Geneva, Candollea 72 (1), pp. 155-198 : 182

73. Ophioglossum zeilanicum Houtt.,

Nat. Hist. II(14): Aanwyz. Plaat. [1], 43, tab. 94, fig. 1. 1783.

≡ Tectaria zeilanica (Houtt.) Sledge in Kew Bull. 27: 422. 1972.

Lectotypus (designated here by Callmander & Fumeaux): CEYLON [ SRI LANKA]: Thunbe rg s.n. ( G -P REL [ G00818063 ]!; isolecto-: UPS-THUNB n° 24418 image seen) ( Fig. 9 ).

Notes. – HOLTTUM (1991: 75) designated a type specimen at UPS: “ Type: Thunberg s.n., Sri Lanka (UPS, not seen)”. The finding of a specimen annotated by Houttuyn in his own herbarium in G-PREL ( Fig. 9 ) supersedes this implicit lectotypification. Houttuyn’s plate was clearly drawn from the specimen in G-PREL.

On the latter sheet and in Aanwyz. Plaat., the epithet is spelled as the more usual “zeylanicum”, but on p. 43 as “ zeilanicum ”, which is the spelling that most people saw and copied and that should be retained. It was identified as Acrostichum quercifolium Retz. by H. Christ, a synonym according to HOLTTUM (1991: 75).

Ophioglossum zeilanicum is the first report by Houttuyn of a specimen from Ceylon in his own herebarium (see introduction p. 160).

Figures

Fig. 9. – Lectotype of Ophioglossum zeilanicum Houtt. in Houttuyn’s herbarium in G-PREL.