PHILIPPINE SPECIES OF ATHYRTUM. 289 
Pinnules or segments strongly falcate Ifi.ehcnuni 
Pinnules or segments not strongly falcate. 
Rachis of pinnae winged only near apex 17, atratum 
Free pinnules few 16. cyatheaefolium 
Pinnules very oblique, short, sharply cut 12. nigripen 
Frond hipinnate, veins anastomosing 25. esculent inn 
Fronds almost bipinnate. 
Pinnae approximately equal-rfided at base. 
Sori costular, reaching hardly ^ to margin 28. hrachysoroidca 
Sori reaching more than half way to margin. 
Frond broadly triangular 2Q.deltoidettm 
Lowest pimiie not elongate 27. sorsogoncnse 
Pinnae oblique at base. 
Moderately oblique. 
Pinnee more than 4 cm long 30. Whitfordi 
Pinnae less than 3 cm long : 33. WHUamfii 
Pinnae strongly auricled above 3\. liolsteri 
Fronds pinnate, pinnae out but not beyond the middle. 
Veins free. 
Pinnae not over 2 cm long 33. Williamsi 
PinnsB 2.5-4 cm long, obtuse ^ Z6, cretuito-serratum 
PinuiP more than 6 cm long, acute 34, pinnatum 
Veins anastomosing 39. accedem 
Fronds pinnate, pinna entire or serrate. 
Frond pinnatifid at apex. 
Pinn« ovate, falcate 35. culfratum 
Pinnae narrower, straight. 
Indusium conspicuous 3G. crenatO'Seryaium 
Indusium inconspicuous - 37 . iticonspicuum 
Apical pinna like the lateral. 
, Veins free. 
Pinnse lanceolate, truncate at base 3S, pallidum 
Pinna- lanceolate, cuneate, serrate 40. palauanaise 
Piiin;u very broadly lanceolate, entire 41. fraxinifoUnm 
Pinnae ovate, stipitate A3.tahanmnn 
Veins anastomosing. 
Pinna' ovate, or frond simple and cordate. 
Pinnae usually about 10 pairs 44. parte ns 
Pinnae few, or frond simple 45. cordifolium 
Pinnae broadly lanceolate. 
Rachis stramineous, naked ~ 41. fra^ini folium 
Rachis ebeneous, chaffy 42.Cumingi: 
Fronds pinnatifid 46. MerriUt 
DRYOPTEKOID SPECIES. 
1. A. hyalostegium Copel. in Philip. Jonrn. Sci. 1 (1906) Suppl. 253. 
Mount Mariveies, alt. 1,350 m. Copeland 2033, }fcrnll 5/<S6; Zambales Prov., 
For. Bur. 82U Curran d Merritt. 
2. A. Loheri Christ in Bull. Herb. Boiss. 11 6 ^1906) 1001. 
(Montalban, Rizal Prov., Loher*) : Bulalucao, Mindoro, Bur. Sci. 1529 Ber- 
mejos, det. by Dr. Christ. 
* Specimens cited in parenthesis were not seen by me. 
