The botanical legacy of Martinus Houttuyn (1720 - 1798) in Geneva Author Wijnands, Dirk Onno Author Heniger, Johannes Author Veldkamp, Jan Frederik Author Fumeaux, Nicolas Author Callmander, Martin W. text Candollea 2017 2017-05-12 72 1 155 198 journal article 20627 10.15553/c2017v721a11 ae864518-b1d7-49da-85dc-905b1a4e6809 2235-3658 5721887 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).