PTERIDEJE ADIANTUM. 93 



(1) A. philippense L. Stipes 5 to 20 cm. high, wiry, naked, polished, 

 dark brown; from 15 to 25 cm. long, or the apex more prolonged and 

 rooting, about 5 cm. broad, simply pinnate; pinnae variable, mostly about 

 2 cm. long by 1 cm. broad, more or less deciduous from the upper end of a 

 stalk sometimes 15 mm. long, the side toward the rachis forming an obtuse 

 angle with the basiscopic, or sometimes a straight line with it, the upper 

 and outer margins rounded, more or less incised; veins only moderately con- 

 spicuous; sori narrower than the lobes they are borne on, and lunulate 

 rather than straight. A. lunulatum Burm. 



Luzon, Cuming 73; Philippines, Kuhn; Baguio, Elmer 6596; Pangasinan, 

 Merrill 281; Lamao Forest Reserve, Copeland 397; Manila, Marave, Topping 

 6; Albay, Baranda. 



Pantropic. 



(2) A. alatum Copeland. Like the preceding species in size and general 

 appearance; stipe, rachis, and petiolules with a membranous wing 0.5 mm. 

 broad on each side; petiolules rather shorter; inner and lower sides of 

 pinnae at about a right angle, upper side nearly straight; venation very 

 prominent; sori the width of the lobes bearing them, straight rather than 

 lunulate. 



Lamao Forest Reserve, Copeland 243, 1399; Culion, Merrill 482. 



(3) A. caudatum L. Stipes tufted, spreading, 3 to 10 cm. long, tomen- 

 tose; frond 15 to 30 cm. long, usually elongate and rooting at the apex, 

 simply pinnate; pinnae 10 to 15 mm. long, half as deep, horizontal or ascend- 

 ing, almost sessile, dimidiate, broadest next the base, lower line straight 

 and entire, upper finely incised more deeply than in the preceding species, 

 herbaceous or subcoriaceous, villose; veins prominent, close; sori mostly 

 roundish, on the ends of the lobes. 



Luzon, Cuming 11; Cagayan-Luzon, Warburg 12213; Benguet, Loher, 

 Elmer 6403; Nueva Ecija, Merrill 278; Bataan Province, Merrill 1603, 

 Barnes Forestry Bureau 164, Whitford 200; Manila, Loher, Warburg; 

 Masbate, Baranda; Capiz, Copeland 55; Mindanao, Cuming 292; Davao, 

 Copeland 633. 



Africa to Malaya. 



(4) A. Capillus-Veneris L. Stipes about 20 cm. high, black, polished; 

 frond 20 to 40 cm. high, deltoid or narrower; lowest pinnse themselves spar- 

 ingly bipinnate; ultimate segments fan-shaped, 10 to 18 mm. deep, with 

 cuneate base and rounded, lobed outer side, membranous, glabrous; sori 

 (in Philippine specimens) decidedly broader than deep. 



Benguet, Elmer 6417; Mariveles Loher. 

 Southern Europe and Tropics everywhere. 



(5) A. diaphanum Blume. Stipe 10 to 20 cm. high, slender, blackish, 

 polished; frond 10 to 15 cm. high, 2 to 3 cm. broad and simply pinnate, or 

 usually with 1 to 3 branches at the base, which are sometimes nearly as 

 large as the terminal one; pinnules 1.5 cm. long, half as deep, lower line 

 rather decurved, upper parallel with it and crenate like the outer edge, 

 membranaceous, not quite glabrous; sori round-reniform, in the sinuses of 

 the upper and other margin. Beside the usual mature form, young plants 



