Plantae novae Japonicae. I. 289 



bifolious habit. The nearest allied species seems to me to be Platanthera 

 orbiculata (Pursh) Lindl. of North America. 



10. Scirpus (Monostachyi) pseudofluitans Makino, 1. c, p. 28. 



Quite pale green. Roots caespitose, fibrous. Stems caespitose. simple, 

 or loosely short-ramose above, decumbent, radicant, multinodulose, partly 

 enclosing with sheaths of leaves, foliate throughout, slender, terete, 

 smooth, attaining about 32 cm in length, the internodes much shorter 

 than leaves. Leaves alternate, but subfasciculate at the top of stems, 

 sheathing at the base, angustato-linear, entire with smooth edges, but 

 hardly scabrous towards the apex, acute or subobtuse, flat but often 

 shallowly subcanaliculate below in front, flatly rounded dorsally, rather 

 thickish, rather strongly 3 — 4-nerved, with very loose transverse distinct 

 veinlets between nerves, attaining 16 cm long including the shething 

 portion, 3 / 5 — 2 mm wide; sheath tubular and often at length breaking, 

 with a subtruncate mouth, pale-membranaceous. attaining 2 l / 3 cm in 

 length. Peduncles 1 or 2 (approximately placed) at the top of stems, 

 slender, rather stout, compressed (oblong in section), with smooth edges, 

 slightly contracted at the top. monostachyus. shorter or longer than leaf- 

 like bracts, but, when there 2 present, its superior one enclosed by 

 sheaths with a much reduced lamina, 5 — 14 cm long, enclosed with the 

 sheath of bracts at the base. Spickelet solitary, terminal, elliptical to 

 oblong, obtuse or acutish-obtuse, 5 — 7 mm long in flower, many-flowered 

 (about 17 — 30 in number), glumes all fertile, without inferior empty 

 glume. Glumes densey imbricated, ovate to oblong-ovate, obtuse, hyalino- 

 membranaceous towards the quite entire margin, green towards the 

 midrib, concave, subcarinate with a smooth edge, delicately and in- 

 distinctly 6 — 9-striate on each side of the midrib, 4 — 4'/2 mm long, 

 2 — 3 mm broad, the outermost one erect, shorter or sometimes somewhat 

 longer than spikelet. with a flower in its axil, subulato-oblong to oblong- 

 linear, or linear, acute or subobtuse, entire, often leaf-like and thickish 

 above. 3— 4-nerved, with transverse veinlets between nerves, dilated and 

 embracing the base of spikelet at the base, 4 — 9 mm long. Rachilla 

 notched, glabrous. Stamens 3; filaments filiform; anther linear, yellow, 

 subbifid-truncate at the base, acute with a connective-tip at the apex, 

 about l»/ a mm long. Ovary sessile, oblong-elliptical, compressed, smooth, 

 pale, about 1 mm long; style much longer than the ovary, about 5V> mm 

 long, rather stout, very deeply bifid, arms filiform, minutely puberulent, 

 much longer than the smooth connate portion. — Norn. Jap. Byakko-i, 

 Uki-i (nov.). - Hab. Prov. Iwashiro: Tonokuchi-hara (G. Nakahara! 

 Aug. 1904); Prov. Shimotsuke: Otahara (T. Watanabe! Jan. 3. 1905). — 

 Rare. This species is very closely allied to Scirpus fluitans Linn., from 

 which it differs by its robustness and stiffness in every respect, quite 

 viridescent habit, broader and longer leaves, larger and numerous-flowered 

 spikelets. and the more or less distinctly leaf-like lowest glume. Possibly 

 a remarkable variety of S. fluitans Linn. 



Repertorium novarum specierum. VI. 19 



