68 



Calamaria japonica 0. Kuntze, Rev. Gen. PI. II. p. 828. 



Isoetes edulis Sieb. ex Miq. Prol. Fl. Jap. p. 390. 



Perennial, sometimes wholly submersed. Candex 3-lobed, i-2J cm. 

 across, bliicldsh, densely emitting umber-coloured roots. Leaves tufted, 

 erect or erect-patent, about fi-100 or more in number, 8-90 cm. long, 1-3^ 

 mm. across below the middle, bright green, white and pellucid towards the 

 base, subflaccid, slender, tapering towards the point which is obtuse under lens, 

 subangulato-semiterete, plane in front, septate, usually stomatiferous, the lower 

 edges thin and decurrent from the dilated and concave or subconcave phyl- 

 lopode, which is sub?quare or subdeltoid-subsqnare or oval-subsquare (4-14 mm. 

 long, .5-12 mm. broad) in form and thinly membranaceous (translucent to- 

 wards the margin) in the border and thickly close-imbricated. Velum none ; 

 fovea elliptical to narrowly oblong. Ligule thinly membranaceous, cordato- 

 deltoid, long-attenuated above and acuminate, 3-8 mm. long. Sporangia 

 elliptical to narrowly oblong, compressed, thinly and delicately membrana- 

 ceous, pale, unspotted, 4-9 mm. long. Macrospores white, globose, marked 

 on one hemisphere with a tricrural elevated line, deeply and subregularly 

 alveolate. Microspores oval-elliptical, slightly oblique in form, smooth, 

 often crested with an entire margin. 



Nom. Jap. Michu-nira, ike-nira, haioa-nira. 



Hob. Prov. MusASHi : Omiya-hachiman in Wada-mura {B. Yaiahe and 

 J. Matsu7nura ! herb. Sc. Coll. Imp. Univ. Tokyo, Nov. 23, 1879 ; Herb. ! 

 ibid. Nov. 9, 1890 ; T. 3Iahino\ June 3, 1888, Oct. 3, 1897, May 15, 1901), 

 Ogikubo {T. Blakino ! Nov. 5, 1898), Himon-ya {T. Makino ! July 1901), 

 Tokyo, Bot. Gard,, Koishikawa {T. MaUno ! Aug. 1895, July 1901, Sept. 23, 

 1904) ; Prov. Shimoosa : Junsai-numa in Konodai {T. Blakino ! May and Oct. 

 1896) ; Prov. Shimotsuke : Udzumagawa in Tochigi-machi (^K. Kaioaguclii ! 

 herb. ibid. Jan. 1903) ; Prov. Yamashiro : Odani-no-ike in Nishi-kamo- 

 mura (F. Tanaka\ Sept. 8, 1895); Prov. Bitchu : Itakura in Makane- 

 mura {D. Nikai\ herb. ibid. Sept. 21, 1902); Prov. Tosa : Sakawa {T. 

 Makino \ 1884), Hirooka {T. Makino \ Oct. 15, 1892). 



Common and widely distributed in Japan. Caudex is in mud, and 

 leaves, except the lower portion, are usually aerial, but sometimes wholly 

 submersed when found in rapid rivulets. 



Epipogum japonicum Makino sp. nov. 



An aphyllous orchid, 7-21 cm. high. Tuber obovoid or ellipsoid, with 



