116 The Philippine Journal of Science me 
LYGODIUM Swartz 
LYGODIUM CIRCINATUM (Burm.) Sw. Syn. Fil. (1806) 153; v. A. v. 
R. Mai. Ferns 111. 
Ophioglossum circinnatum Burm. FI. Ind. (1768) 228. 
Amboina, Amahoesoe, Robinson PL Rumph. Amb. 451, August 13, 1913, 
on limestone formation, altitude 30 meters; Binting, Robinson PL 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 J (1801) 106; 
v. A. v. R. Mai. Ferns 111. 
Ophioglossum scandens Linn. Sp. PI. 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 J (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 
