H(5 The Philippine Journal of Science wis 



LYGODIUM Swartz 



LYGODIUM CIRCINATUM (Burm.) Sw. Syn. Fil. (1806) 153; v. A. v. 

 R. Mai. Ferns 111. 

 Ophioglossum circinnatum Burm. Fl. Ind. (1768) 228. 



Amboina, Amahoesoe, Robinson PL Rumph. Amb. 451, August 13, 1913, 

 on limestone formation, altitude 30 meters; Binting, Robinson PI. Rumph. 

 Amb. 542, on limestone formation, altitude 5 meters; locally known as paku 

 kawa. 



Representing: Adianthum volubile polypoides (sive majus) Rumph. 

 Herb. Amboin. VI, 75, tab. XXXIII, and A. v. medium Rumph. 1. c. 75. 



Distrib.: Tropical Asia to Queensland. 



LYGODIUM SCANDENS (Linn.) Sw. in Schrad. Journ. 1800 2 (1801) 106; 

 v. A. v. R. Mai. Ferns 111. 

 Ophioglossum scandens Linn. Sp. PL ed. 2 (1763) 1063. 



Amboina, Soja road, Robinson PL Rumph. Amb. 453, August 20, 1913, 

 in thickets, altitude about 70 meters; near the town of Amboina, Robinson 

 PL Rumph. Amb. 454, October 27, 1913, in light woods, altitude about 30 

 meters; locally known as paku kawa. 



Representing: Adianthum volubile minus Rumph. Herb. Amboin. VI, 

 76 tab. XXXII, fis. 2-3 (No. 453), and A. v. minus alterum Rumph. 1. c. 

 76 (No. 454). 



Distrib.: Tropical Africa, Asia, Australia, and Polynesia. 



LYGODIUM FLEXUOSUM (Linn.) Sw. in Schrad. Journ. 1800 1 (1801) 106, 

 p. p.; v. A. v. R. Mai. Ferns 114. 

 Ophioglossum flexuosum Linn. Sp. PL ed. 2 (1763) 1063. 

 Amboina, hills behind the town of Amboina, Rel. Robins. 1975, October 

 27, 1913, in light woods, altitude about 30 meters. 

 Distrib.: Southern China, Malaya, and Queensland. 



LYGODIUM DIMORPHUM Copel. in Philip. Journ. Sci. 6 (1911) Bot. 67 



(July 2). 



Lygodium novo-guinense Ros. in Fedde Rep. 9 (1911) 427 (August 15). 



Amboina, Batoe merah, Rel. Robins. 1981, August 24, 1913, in ravines, 

 altitude about 20 meters; locally known as paku kawa. 



Mr. Merrill thought that this specimen was a more compound form of 

 L. semihastatum Desv. In my opinion it is absolutely identical with Cop- 

 land King's No. 134 from New Guinea, on which Copeland based his diag- 

 nosis of Lygodium dimorphum. Of this number we also possess a duplicate, 

 and we have a specimen, from Skore (New Guinea, leg. Treub), bearing 

 on the very same rachis: a, sterile pinnae like those of L. dimorphum; b, 

 fertile pinnae like those of L. dimorphum and of L. semihastatum, but the 

 latter only sparingly spiciferous; c, fertile pinnae more or less resembling 

 those of L. trifurcatum Bak., as intermediates between those mentioned un- 

 der b. It may be possible, that L. dimorphum is a strongly developed form 

 of L. semihastatum and that Treub's plant unites both extremes as well as 

 the intermediate; or the first two are not identical and L. dimorphum 

 shows, when in a juvenile state, forms resembling L. semihastatum and 

 L. trifurcatum. The true Philippine L. semihastatum apparently never 

 reaches the strong development of the Papuan L. dimorphum, and the 



