ASPIDIACEAE 79 



18A. Indusia erose-ciliate; sori with paraphyses 27. A. rupestrc 



18B. Indusia entire; sori without paraphyses 28. A. yokpscense 



15B. Indusia linear, usually 4-8 mm. long. 



19A. Pinnae membranous, the median and upper ones slightly adnate to the rachis; scales on stipes lanceolate to linear-lanceolate. 



12. A. ol{udairae 

 19B. Pinnae herbaceous to somewhat chartaceous, mostly not adnate to the rachis; scales on stipes narrowly ovate. 13. A. wichurae 

 14B. Pinnae simple to much dissected, not at all or only slightly oblique at the base, usually equilateral. 

 20A. Pinnae sessile, lanceolate to linear-lanceolate, equilateral, regularly lobulate, sometimes dissected, the pinnules on a prominently 

 winged rachis. 

 21A. Pinnae deeply pinnatiparted, the sinus between the segments broad; indusia solitary, simple, sometimes athyrioid. 



22A. Blades 35-45 cm. wide; pinnae 15-22 cm. long, 3.5-4 cm. wide 14. /4. ptcrorachis 



22B. Blades 17-22 cm. wide; pinnae less than 15 cm. long, 2-3.5 cm. wide 15. ^. henryi 



21B. Pinnae lobulate to pinnatiparted, the sinus between the segments narrow; indusia numerous and parallel on the segments or 

 lobes, usually asplenioid, sometimes diplazioid on the lowest veinlet, very rarely athyrioid. 



23A. Rhizomes short and thick; fronds tufted 16. A. pycnosorum 



23B. Rhizomes long-creeping, slender; fronds remote. 



24A. Pinnae obtuse to acute, 1-3 cm. long \7. A. grammitoides 



243. Pinnae acuminate, 5-15 cm. long 18. ..4. japonictim 



20B. Pinnae at least the lower petiolulate, if sessile the pinnules oblique or pinnately compound on a wingless rachis. 

 25A. Pinnules while young with few fleshy deciduous bristles along cost on the upper side. 

 26A. Pinnae long-acuminate, deeply bipinnaticleft to bipinnate. 



27A. Stipes and rachis greenish; pinnules oblique; indusia asplenioid to athyrioid 19. A. iseanum 



27B. Stipes and rachis purplish; pinnules equilateral or nearly so; indusia sometimes diplazioid 20. A, frangulum 



26B. Pinnae obtuse to acute, pinnately lobulate to parted 21. A. tozanense 



25B. Pinnules without deciduous fleshy bristles on upper side. 

 28.\. Pinnae sessile or nearly so. 



29A. Scales on stipes broadly lanceolate to narrowly ovate, to 5 mm. wide or more. 



30A. Scales at base of stipes broadly lanceolate, fuscous 24. A. filix-jemina var. longipes 



30B. Scales at base of stipes narrowly ovate, nearly black 25. A. melanolepis 



29B. Scales on stipes subulate to narrowly lanceolate, gradually narrowed to a long filiform tip, to 2(-3) mm. wide. 



31 A. Pinnae deflexed e-xcept the upper ones, usually not more than 2.5 cm. long 26. A. reflexipinniim 



3 IB. Pinnae spreading, not deflexed except sometimes the lowest ones. 



32A. Scales at base of stipes fuscous to pale brown; indusia asplenioid and athyrioid. 

 33A. Blades oblong-ovate to broadly lanceolate; pinnae sessile. 



34A. Indusia erose-ciliate; sori with paraphyses 27. A. rupestre 



34B. Indusia entire; sori without paraphyses. 



35A. Scales at base of stipes 7-12 mm. long, 1-1.5 mm. wide 2S. A. yo){oscense 



35B. Scales at base of stipes about 15 mm. long, 0.5-2 mm. wide 29. A. tashiroi 



33B. Blades deltoid to deltoid-ovate; pinnae short-petiolulate to subsessile. 



36A. Blades 40-70 cm. long, 30-50 cm. wide; pinnae short-petiolulate; pinnules acute 2>0. A. multifidiim 



36B. Blades 17-30 cm. long, 15-25 cm. wide; pinnae nearly sessile; pinnules subobtuse to acute. . . 31. A. pinelorum 

 32B. Scales at base of stipes nearly black; indusia mosdy asplenioid. 



37A. Pinnae lanceolate to linear-lanceolate, 20-40 mm. wide; pinnules 12-20 mm. long, usually acute; lowest anterior 



indusia sometimes athyrioid 32. A. otophorum 



37B. Pinnae broadly linear, about 15 mm. wide; pinnules less than 12 mm. long, obtuse to rounded; lowest anterior 



indusia diplazioid 33. A. subrigescens 



28B. Lower pinnae more or less petiolulate. 

 38A. Ultimate pinnules prominently oblique. 



39A. Stipes greenish to straw-colored, herbaceous, dull; pinnae equilateral. 



40A. Rhizomes creeping 34. A. niponicum 



406. Rhizomes short, erect or ascending; fronds tufted. 



41A. Indusia asplenioid or sometimes athyrioid; blades ovate to deltoid-ovate 35. A. vidalii 



41B. Indusia mostly asplenioid, rarely diplazioid; blades narrowly to broadly ovate 36. A. wardii 



39B. Stipes brownish, coriaceous, lustrous; pinnae oblique; sori costal; indusia asplenioid 37. A. mcsosorum 



38B. Ultimate pinnules nearly equilateral. 



42A. Rachis and stipes prominently scaly throughout; sori costal. 



43A. Pinnae nearly opposite, thinly herbaceous; stipes and blades smooth. 



44A. Rhizomes long-creeping, slender, the fronds somewhat remote; pinnae more or less oblique; lower pinnules 



pinnatiparted; indusia 1-3 mm. long, asplenioid 38. A. crenalum var. ghbrum 



44B. Rhizomes thick, short, erect or ascending, the fronds tufted; pinnae equilateral; pinnules sometimes pinnati- 

 parted to -lobed, the lobes orbicular to elliptic; indusia 3—4 mm. long, frequently diplazioid and asplenioid. 



39. A. squamigerum 



43B. Pinnae alternate, chartaceous-herbaccous; stipes and blades scabrous 40. A. procerum 



42B. Rachis and stipes densely scaly only at base, sparsely so or glabrous above. 



45A. Sori mostly elongate; indusia linear, solitary or sometimes diplazioid; pinnae crenate- or mucronate-toothed, the 

 upper ones only slightly decurrent. 

 46A. Lower veinlets united to those of the adjacent veins; blades thinly chartaceous, brownish when dried; pinnules 



lobulate to shallowly lobed 41. /(. esctilenltim 



46B. Veinlets free. 



47A. Blades 2- to 4-pinnate. 



