PHILIPPINE SPECIES OF ATHYRIUM. 
289 
Pinnules or segments strongly falcate 
Pinnules or segments not strongly falcate. 
Rachis of pinnae winged only near apex 
Free pinnules few 
Pinnules very oblique, short, sharply cut 
Frond bipinnate, veins anastomosing 
Fronds almost bipinnate. 
Pinnae approximately equal-sided at base. 
Sori costular, reaching hardly £ to margin 
Sori reaching more than half way to margin. 
Frond broadly triangular 
Lowest pinnae not elongate 
Pinnae oblique at base. 
Moderately oblique. 
Pinnae more than 4 cm long 
Pinnae less than 3 cm long 
Pinnae strongly auricled above 
Fronds pinnate, pinnae cut but not beyond the middle. 
Veins free. 
Pinnae not over 2 cm long 
Pinnae 2.5-4 cm long, obtuse 
Pinnae more than 6 cm long, acute 
Veins anastomosing 
Fronds pinnate, pinnae entire or serrate. 
Frond pinnatifid at apex. 
Pinnae ovate, falcate 
Pinnae narrower, straight. 
Indusium conspicuous 
lndusium inconspicuous 
Apical pinna like the lateral. 
Veins free. 
Pinnae lanceolate, truncate at base 
Pinnae lanceolate, cuneate, serrate 
Pinnae very broadly lanceolate, entire 
Pinnae ovate, stipitate 
Veins anastomosing. 
Pinnae ovate, or frond simple and cordate. 
Pinnae usually about 10 pairs 
Pinnae few, or frond simple 
Pinnae broadly lanceolate. 
Rachis stramineous, naked 
Rachis ebeneous, chaffy 
Fronds pinnatifid 
16. ebenum 
n.atratum 
16. cyatheaefolium 
12. nigripes 
25. esculentum 
28. brachysoroides 
.. 29. deltoideum 
27 . sorsogonense 
30. Whitfordi 
33. Williamsi 
.. 31. Bolsfefi 
33. Williamsi 
36. crenato-serratum 
34. pinnatum 
39. accedens 
35. cultratum 
36. crenato-serratum 
37. inconspicuum 
38. pallidum 
40. palauanense 
41. fraxinifolium 
.... 43. tabacinum 
44. pariens 
.. 45. cordifolium 
41. fraxinifolium 
42. Cumingi: 
46. Merrilli 
DRYOPTEROID SPECIES. 
1. A. hyalostegium Copel. in Philip. Journ. Sci. 1 (1906) Suppl. 253. 
Mount Mariveles, alt. 1,350 m. Copeland 203d, Merrill 5186; Zambales Prov., 
For. Bur. 8214 Curran c£ Merritt. 
2. A. Loheri Christ in Bull. Herb. Boiss. II 6 (1906) 1001. 
(Montalban, Rizal Prov., holier’’ ) : Bulalacao, Mindoro, Bur. Bci. 1529 Ber- 
mejos, det. by Dr. Christ. 
* Specimens cited in parenthesis were not seen by me. 
