Pteridaceae 



39 



lA. Blades simply pinnate, not broadened at base; pinnae obtuse, oblique at base I. M. maximowiczii 



IB. Blades 2- to 4-pinnate, broadest at base; pinnae acute to acuminate, equilateral. 

 2A. Blades 10-25 cm. wide, 2- or 3-pinnatiparted to 2- or 3-pinnate, the rachis often extended and gemmate at the tip; bulbils absent 



in the a.\ils at base of pinnae 2. M. flagellare 



2B. Blades larger, 25-40 cm. wide, acuminate, 3-pinnate, not gemmate at the tip; bulbils present in axils at base of median and upper 

 pinnae 3. M. aral^ii 



1. Monachosorum maximowiczii (Bak.) Hayata. Poly- neous, brownish at base; blades narrowly 3-angIed, 20-60 cm. 

 podium maximowiczii Bak.; Ptilopteris maximowiczii (Bak.) long, 10-25 cm. wide, 2- or 3-pinnatiparted to nearly 2- or 

 Hance; Polystichum maximowiczii (Bak.) Diels; Phegopteris 3-pinnate, narrowed at tip, broadest at base, the rachis often 

 maximowiczii (Bak.) H. Chr.; Monachosorella maximowiczii extended and gemmate at the tip; pinnae many, membranous, 



(Bak.) Hayata Fuji-shida. Fronds slender, evergreen, linear to lanceolate, 7-17 cm. long in the lower ones, 2-4 cm. 



sparsely brownish scurfy beneath while young; rhizomes wide, narrowed at tip, sessile or subsessile, green on both sides, 



short, ascending, covered with the persistent bases of old stipes; bulbils present in a-xils at base of median and upper pinnae; 



sdpes brown, lustrous, 6-20 cm. long, about 2 mm. across; ultimate pinnules oblong, obtuse, toothed, oblique; veinlets 



blades herbaceous-membranous, linear-lanceolate, 20-50 cm. few on each side of the ultimate pinnules, not prominent; sori 



long, 2-4(-5) cm. wide, simply pinnate, contracted at base, intramarginal, solitary on the teeth; indusia absent. Rocky 



gradually long-attenuate and gemmate at the tip on the naked places in damp woods in mountains; Honshu (Kanto Distr. 



extension of the rachis; pinnae many, horizontally spreading, and westw.), Shikoku, Kyushu; rare. 



broadly lanceolate, 1-2.5 cm. long, 3-7 mm. wide, obtuse, 3. Monachosorum arakii Tagawa. Hime-mukago-shida. 



obliquely cuneate and auriculate at base, obtusely toothed, ses- Brown-scurfy throughout except for the upper side of frond; 



sile, the lower pinnae smaller and deflexed, the upper ones rhizomes short, covered with the persistent remains of old 



gradually reduced; veins pinnate, short, obhque, veinlets sim- stipes; stipes 55-60 cm. long, about 5 mm. across at base, stra- 



ple; sori intramarginal, sohtary on the teeth, sometimes slighdy mineous to rusty-brown toward base; blades thinly herbaceous, 



incurved on margin; indusia absent. Shaded rocky places narrowly triangular-ovate, 50-70 cm. long, 25-40 cm. wide, 



in woods in mountains; Honshu (Kanto Distr. and westw.), tripinnate, the rachis grooved on upper side, bulbils present in 



Shikoku, Kyushu; rather rare. Formosa and China. axils of median and upper pinnae; pinnae broadly lanceolate, 



2. Monachosorum flagellare (H. Chr.) Hayata. Poly- to 30 cm. long and 10 cm. wide in the lower ones, long-acumi- 

 stichum flagellare H. Chr.; Monachosorella flagellaris (H. nate, spreading, short-petiolate; pinnules lanceolate, to 7 cm. 

 Chr.) Hayata; Monachosorum nipponicum Makino; Monacho- long and 1.5 cm. wide, acute to acuminate, sessile; ultimate 

 sorella nipponica (Makino) Hayata; Monachosorella flagellaris pinnules and segments oblong to ovate, to 1 cm. long and 5 



var. nipponica (Makino) Tagawa O-fuji-shida, Kishu- mm. wide, obtuse, obliquely cuneate at base, crenate-incised to 



SHiDA. Fronds evergreen, thinly brown scurfy beneath; rhi- pinnatifid; sori submarginal, naked. Honshu (Tanba, Kii, 



zomes short, ascending, densely clothed with the basal remains and Suwo Prov.) ; very rare. 



of old stipes; stipes 10-30 cm. long, 2-3 mm. across, strami- 



4. LINDSAEA Dryand. Hongu-shida Zoku 



Terrestrial or epiphytic; rhizomes creeping, elongate or short, with narrow small scalelike hairs; fronds stipitate, pinnate or 

 pinnately compound, rarely simple; pinnules usually thin, usually dimidiate, rarely equilateral, glabrous; veins free or sometimes 

 loosely anastomosing; sori on the upper and outer margins, intramarginal or apparendy marginal, terminal, solitary or more often 



united into transverse coenosori; indusia rounded, more often transversely elongate by the union of adjacent ones. About 



200 species, of wide distribution in the Tropics. 



lA. Stipes sulcate in upper part, not 4-angled; blades simply pinnate; rhizomes slender and long-creeping, remotely leaved. 

 2A. Stipes 3-15 cm. long, usually red-brown at base; blades 7-25 cm. long; median pinnae truncate on the anterior side at base; sori 



usually interrupted by sinuses of lobes; rhizomes 1.5-2 mm. across, the scales about 2 mm. long 1. L. cultrata 



2B. Stipes 1-8 cm. long, dark purple-brown at base; blades 3-10 cm. long; median pinnae broadly cuneate on anterior side at base; sori 

 usually uninterrupted, nearly straight, sometimes interrupted by a shallow sinus between the teeth; rhizomes 1-1.5 mm. across, 



the scales about 1 mm. long 2. L. japonica 



IB. Stipes 4-angled, not sulcate; blades simply pinnate or biplnnate; rhizomes short-creeping, closely leaved. 

 3A. Blades pinnate or bipinnate, the ultimate divisions oblique, elliptic or ovate, rounded to broadly cuneate at base. 



3. L. orbiculata var. chienii 

 3B. Blades pinnate, the pinnae flabcUate, nearly equilateral, truncate at base 4. L. simulans 



1. Lindsaea cultrata (Willd.) Sw. Adiantum cultratum ovate, 8-18 mm. long, 4-7 mm. wide, subacute to obtuse, 



Willd. HoNGU-SHiDA. Fronds slender, evergreen, gla- nearly truncate on anterior margin at base, minutely im- 



brous; rhizomes slender, creeping, 1.5-2 mm. across, with pressed-punctate beneath, short-pedolulate, the posterior mar- 



ILnear-lanceolate, dark brown, lustrous, entire scales about 2 gin nearly straight and only slightly incurved toward the 



mm. long; stipes 3-15 cm. long, green and sulcate on the up- apex, entire, the anterior margin toothed or few-lobulate, 



per portion, reddish brown in lower half, glabrous or with few gendy curved to nearly straight; sori on the anterior margin 



scales toward the base; blades hnear-lanceolate, 7-25 cm. long, of the pinnae, interrupted, usually with an obscure mucro on 



1.5-3.5 cm. wide, gradually acute to subacuminate, pinnate, both sides; indusia undulate to erose. Wet shaded rocks 



green; rachis usually pale green; pinnae thinly herbaceous, along streams in mountains; Honshu (Izu Isls., Ise and Kii 



