19050 OBSERVATIONS ON THE FLORA OF JAPAN. 27 



Mel. Biol. XII. p. 551 (1886) ; Krftnzl. Orchid. Gen. et Sp. I. p. 029 ; 

 Knife in Journ. Linn. Soc. XXXVI. p. 57. 



Habenaria ussuriensis Miyabe FI. Kuril. Isl. n. 251. 



Platanthera tiptdoides var. y. ussuriensis Kegel et Maack, Tent. Fl. 

 Ussur. n. 477, tab. 10, fig. 7-9 (pess.) ; Franch. et Sav. Enura. PI. Jap. 

 II. p. 32. 



Platanthera herbiola var. jo mica A. Finet. in Bull. Soc. Bot. France, 

 XLVII. (1900) p. 281. 



A terrestrial orchid, 20-52 cm. in height, glabrous. Tuber slender, 

 root-like, horizontal or obliquely so ; roots few, simple. Stem erect, slender, 

 sheathing at the base. Leaves several, membranaceous ; lower 2 larger, 

 erect-patent, vaginate, remote or approximate one another, the lowest one 

 largest, oblanceolate to obovato-oblong, gradually cuneato-attenuated below, 

 obtuse at the apex, delicately several-nerved on each side, with oblique 

 transverse veinlets, 8-15 cm. long except the vagina, 18-43 mm. broad, the 

 next one smaller, oblong-lanceolate to linear-lanceolate, gradually cuneato- 

 attenuated below, attenuated above and with an obtuse or acute point, few- 

 several-nerved on each side, 4-15 cm. long, 4-33 mm. broad; the rest ones 

 bract-like, adpressed, evaginate, amplexicaul, angustato-subulato-lanceolate or 

 subulato-linear, acuminate, the lower one attaining about 3 \ cm. or rarely more 

 long. Raceme erect, rather loosely many-flowered, about 6-21 cm. long ; 

 rachis slender, glabrous ; bracts erect-patent, exceeding the flowers or equal 

 to ovaries in length, angustately subulato-lanceolate or subulato-linear or 

 subulate, acuminate, embracing the ovary by its base, membranaceous, 3- 

 sub-5-nerved, attaining about 2 cm. long. Flowers small, flavo-viridescent. 

 Sepals thin, 3-nerved ; the upper one erect, ovato-orbiculate to elliptical-oval, 

 rounded at the apex, concave, 2-2^ mm. long ; lateral ones reflexed, oblong, 

 somewhat oblique in form, slightly longer than the upper one, 21-3^ mm. 

 long. Petals erect, connivent with the upper sepal, carnosulate, equal to 

 or slightly shorter than the upper sepal, lato- linear sometimes spathulate 

 and arcuate, rounded-obtuse, 2-nerved. Labelluin carnosulate, 2^-4^ mm. 

 lone, rounded-obtuse or truncate sometimes subcordato-truncate at the base, 

 trifid below, the midlobe larger, ovato-obloug to narrowly oblong, or sub- 

 triangular-oblong, rounded-obtuse at the apex, entire ; the basal lobes patent, 

 shortly obliquely subtriangular-ovate, obtuse or acutish, much shorter than 

 the midlobe ; spur pendulous, filiform, shortly attenuated with an obtuse 

 point at the apex, often hardly enlarged towards the apex, equal to or 

 slightly shorter than the ovary in length, slightly arcuate, about 6-7 mm. 

 long. Column 3hort and broad, truncate or emarginato-truncate at -the 



