ASPIDIACEAE 



71 



in 2 rows along the costule, sometimes with 1 or 2 irregular 

 rows nearer the margin and a single sorus (sometimes 2-3) 

 near the base of the segment; indusia membranous, reniform, 



lacinulate-ciliate, about 0.7 mm. across. Woods; Honshu 



(s. Kanto through Tokaido to s. Kinki Distr. and westw.), 

 Shikoku, Kyushu. Formosa. 



2. Ctenitis subglandulosa (Hance) Ching. Ahophila 

 subglandulosa Hance; Aspidium subtripinnatum Miq.; Ne- 

 phroditim sitbtripinnatiim (Miq.) Bak.; Dryopteris siibtripin- 

 nata (Miq.) O. Kuntze; C. subtripinnata (Miq.) H. Ito; Poly- 

 podium old /lamii Bik.; Dryopteris subglandulosa (Hance) Ha- 

 yata; D. lepigera sensu auct. Japon., saltern pro parte, 



non O. Kuntze Katsumo-inode. Rhizomes short-creeping, 



densely scaly; stipes 30-70 cm. long, brown; scales at base of 

 stipes and on rhizomes very numerous, membranous, lustrous, 

 linear, 2-3 cm. long, about 2 mm. wide, nearly cndre, glabrous; 

 scales on upper part of stipes and rachis ovate to broadly lan- 

 ceolate, 2-4 mm. long, narrowed at tip, appressed, lustrous, 

 ciliate; blades ovate, 40-70 cm. long, 20-40 cm. wide, 3-pinnate, 

 short-acuminate, the rachis densely scaly; pinnae obliquely 

 spreading, equilateral, short-periolulate or sessile, the lowest 

 pinnae largest, longer petiolulate, the posterior side broader 

 than the anterior; pinnules oblong-ovate to lanceolate, usu- 

 ally 2-5 cm. long, obtuse to subacute, crenate to lobed, 

 sparsely pilose on upper surface, with brownish short hairs on 

 the costas, the costules beneath with small appressed ovate 

 scales; sori costal or near base of veinlets; indusia membranous, 

 ovate-orbicular or orbicular-reniform, about 0.2 mm. across, 

 erose-ciliate. Honshu (s. Kanto and s. Kinki Distr.), Shi- 

 koku, Kyushu. Ryukyus, Formosa, China to India. 



3. Ctenitis eatonii (Bak.) Ching. Nephrodium eatonii 

 Bak.; Dryopteris eatonii (Bak.) O. Kuntze; N. leucostipes Bak. 



HoRA-KAGUMA. Rhizomes short, ascending; stipes 15-40 



cm. long; scales on stipes and rachis dark brown, chartaceous, 

 linear-subulate, 5-10 mm. long, subentire, auriculate at base; 

 blades ovate, 20-45 cm. long, 13-30 cm. wide, bipinnate to 



tripinnatiparted ; pinnae 9-10 pairs, the upper ones sessile to 

 subsessile, the lower spreading, narrowly ovate-deltoid, 5-14 

 cm. wide, acuminate, short-petiolulate; pinnules broadly lance- 

 olate to oblong-ovate, obtuse to acute, usually prominently 

 short-pubescent on both sides especially on the costas, often 

 lobulate to parted; ultimate pinnules oblong to elliptic, crenate; 

 sori median or slighdy nearer the costule tiian the margin of 

 the ultimate pinnules; indusia orbicular-reniform, entire, 



glandular-ciholate, about 0.3 mm. across. Kyushu (Yaku- 



shima). Ryukyus, Formosa, and s. China. 



4. Ctenitis sinii (Ching) Ohwi. Tectaria sinii Ching; 



Ctenitopsis sinii (Ching) Ching Satsuma-shida. Stipes 



30-45 cm. long, brown; scales at base of stipes numerous, 

 thinly membranous, linear or nearly filiform, 10-20 mm. long, 

 about 1 mm. wide, brown, entire; scales on lower half of 

 stipes lanceolate, 2-7 mm. long, long-acuminate, entire, pur- 

 plish brown, deflexed, with elliptic to round cells, the scales on 

 upper half of stipe and on rachis similar to the lower ones but 

 smaller, ascending to appressed, few-toothed, narrowly deltoid- 

 ovate to broadly lanceolate, 2-3 mm. long; blades herbaceous- 

 chartaceous, ovate, 30-50 cm. long, 20-25 cm. wide, acuminate, 

 bipinnatiparted at base, simply pinnate in upper half; pinnae 

 several pairs, the uppermost linear-lanceolate, forming a large 

 pinnatiparted terminal pinna, the median linear-oblong, 2-5 

 cm. wide, acuminate, broadly cuneate at base, sessile to short- 

 petiolulate, pinnately lobed to parted, sparingly pilose above, 

 with a few appressed small scales on costas beneath; pinnules 

 obliquely spreading, rounded to oblong, 6-12 mm. wide, sub- 

 entire to obsoletely crenate; lowest pinnae ovate-deltoid, to 25 

 cm. long, 15 cm. wide, distinctiy petiolulate, oblique, the seg- 

 ments on posterior side linear-lanceolate, 2-4 times as long as 

 those of the anterior side, usually pinnately lobed to coarsely 

 crenate; sori scattered or in 2 rows slighdy nearer the costule 



than the margin; indusia obsolete. Kyushu (Satsuma 



Prov.) ; rare. China. 



13. LASTREA Bory Oba-shorima Zoku 



Small to moderate terrestrial ferns; rhizomes creeping to erect, dictyostelic, sparsely scaly; fronds often hairy; blades usually 

 bipinnatifid, sometimes more profusely divided, often narrowed at base, with simple, straight, 1-celled hairs; veins free, usually 

 simple, reaching to or short of the margin; sori on the veins, dorsal, rarely terminal, small, rounded or rarely elongate; indusia 

 orbicular-reniform, or absent. Cosmopolitan with about 500 species. 



lA. Indusium absent, or very minute. 



2.^. Sori linear 1. L. pozoi 



2B. Sori orbicular to elliptic. 



3A. Pinnae adnate at base on the winged rachis. 



4A. Blades deltoid, shorter than the stipe 2. L. phegopteris 



4B. Blades lanceolate, much longer than the stipe 3. L. decursivepinnata 



3B. Pinnae sessile, not adnate at base, except the uppermost. 



5A. Pinnules coarsely crenate to lobulate; pneumatophores absent at the base of pinnae; hairs or some of them branched at base. 



4. L. biikoensis 



5B. Pinnules subentire to crenate; pneumatophores subglobose at the base of pinnae beneath; hairs simple 5. Z.. omciensis 



IB. Indusium present. 



6A. Scales on stipes and rachis copious; stipes tufted, on a short rhizome 6. L. qiiclpaerlensis 



6B. Scales very scanty except at base of stipes and on rhizomes; stipes mostly interrupted, on creeping rhizomes. 



7A. Pinnae beneath with a subglobose pneumatophore at base 7. L. subochthodcs 



7B. Pinnae without a globose pneumatophore at base. 

 8A. Blades bipinnatiparted; pinnae sessile or nearly so. 

 9A. Veinlets reaching the margin of the segments. 



lOA. Veinlets forked; blades subglandular; indusium caducous 8. L. thclypleris 



lOB. Veinlets simple; blades usually glandular-dotted; indusium persistent. 



