342 



Orchidaceae 



3B. Leaves 1-1.5 cm. long; spikes about 7-flowered 2. V. fissiim 



2B. Limb of lip triangular, retuse; leaves 7-15 mm. long; spikes 1- to 3-flowered 3. V. yakushimense 



IB, Sepals only very briefly connate at base 4. F. inamii 



1. Vexillabium nakaianum F. Maekawa. Hakuun-ran. ing at base, 3- to 5-leaved in the lower part, glabrous, with 

 Stems 5-12 cm. long, long-creeping at base, with 2-4 leaves in scattered white multicellular hairs above; leaves broadly ovate, 

 lower part, pubescent above; leaves ovate, 3-7 mm. long, 2.5-7 7-15 mm. long, rounded at base, 3- to 5-nerved, the petioles 

 mm. wide, acute, the petioles 3-6 mm. long, sheathing at base; short, sheathing at base; upper reduced leaves 1-3, lanceolate, 

 scalelike leaves 2; spikes 1- to 4-flowered; flowers white; sepals 5-8 mm. long, appressed to the stem; spikes 1- to 3-flowered; 

 forming a campanulate tube below the middle, pubescent out- flowers white, the bracts scarious, pubescent, 3-6 mm. long, 

 side, the dorsal lobe 3.2-3.5 mm. long, acute, the lateral lobes triangular-lanceolate, acute; calyx 3.5^ mm. long on dorsal 

 4.8 mm. long; petals obovate-oblong, the lip about 4.5 mm. side, 5-5.5 mm. on lateral side, tubular-campanulate, loosely 

 long, retrorsely saccate at base, forming a short, retuse spur, pubescent outside, the lobes acute; petals appressed to the 

 the claw entire, narrow, the limb about 2 mm. long, 4.5 mm. dorsal sepal; lip 7-8 mm. long, the spur saccate, the claw slen- 



wide, retuse. Aug. Woods; Kyushu (Mount Kurodake in der, sometimes 1- to 2-toothed on the upper margins, the limb 



Bungo) ; very rare. triangular, retuse, about 4 mm. long, 6 mm. wide. Aug. 



2. Vexillabium fissum F. Maekawa. O-hakuun-ran. Woods; Kyushu (Yakushima); very rare. 



Stems about 13 cm. long, ascending, from a short-creeping 4. Vexillabium inamii Ohwi. Ise-ran. Small peren- 



base, glabrous at base, pubescent above; leaves about 6, nial creeping herb; stems 5-6 cm. long, 3- to 4-leaved toward 



rounded to ovate-elliptic, 1-1.5 cm. long, 8-11 mm. wide, top; leaves orbicular-ovate, 6-10 mm. long, 5-8 mm. wide, 



rounded at both ends or obtuse at apex, 3-nerved, the petioles short-petiolate; scape 2-3 cm. long, with white multicellular 



7-8 mm. long, dilated at base and sheathing for half the hairs, 1-bracteate below the middle; flowers 1-3, rose-colored, 



length; spikes scattered-pubescent, about 7-flowered; bracts in loose 1-sided racemes, the bracts broadly lanceolate, 5-6 



linear-lanceolate, as long as the ovary, acute, about 6 mm. mm. long, appressed to the ovary, loosely ciliate; sepals only 



long; flowers several; sepals pubescent outside, connate below very briefly connate at base, the median deltoid-ovate, about 



the middle, the dorsal lobe about 4 mm. long, narrowly ovate, 3.5 mm. long, erect, obtuse, 1-nerved, loosely pubescent out- 



the lateral lobes oblong, 4.5 mm. long; petals appressed to the side at base, the lateral oblong, erect, about 5 mm. long; petals 



dorsal sepal; lip about 6 mm. long, with an obtuse, saccate, as long as the median sepal, the lip exserted from the perianth, 



retrorse base, the claw entire, the limb about 2 mm. long, 5 the claw lanceolate, about twice as long as the limb, with 2 



mm. wide. July. Honshu (Miyake Isl. in Izu) ; very rare. minute tubercles on the sac, the limb spreading, obcordate- 



3. Vexillabium yakushimense (Yamamoto) F. Mae- trapezoid, about 3.5 mm. long, 5 mm. wide, bifid at apex. 



kawa. Anoectochilus yaJ^ushimensis Yamamoto ^Yaku- Aug. Evergreen forest; Honshu; rare. 



shima-hime-aridoshi-ran. Stems 4-10 cm. long, long-creep- 



32. ODONTOCHILUS Bl. 



Inaba-ran Zoku 



Terrestrial rhizomatous erect herbs, leafy toward the base; leaves ovate to lanceolate, petiolate; inflorescence spicate, the 

 flowers relatively small, sessile; dorsal sepal erect, forming a hood with the petals, the lateral sepals forming a chin with the 

 foot of the column; lip with protuberances inside the saccate base, the claw spreading, fimbriate or dentate, the limb abruptly 

 dilated upward and deeply bifid, conduplicate in bud; column very short, without frontal appendages; stigma often bifid; anther- 

 locules distinct; pollinia sectile, with caudicles; capsules erect. About 10 species, in India, Malaysia, and Formosa. 



lA. Lateral sepals about 11 mm. long; lip about 23 mm. long; claw fimbriate 1. 0. inabae 



IB. Lateral sepals 3-3.3 mm. long; lip about 5.5 mm. long; claw entire 2. O. hatusimanus 



1. Odontochilus inabae Hayata. Anoectochilus inabae 



Hayata Inaba-ran. Stems rather stout, 10-20 cm. long, 



glabrous and leafy below; leaves alternate, ovate-oblong to ob- 

 long, about 4.5 cm. long, 2 cm. wide, acute, rounded to obtuse 

 at base, the petioles about 2 cm. long, sheathing at base; pe- 

 duncles with few scales, pubescent; inflorescence loosely few- 

 flowered; flowers rose; dorsal sepal ovate to broadly so, about 

 5.5 mm. long, slighdy caudate and obmse, the lateral sepals 

 oblong, spreading, about 11 mm. long; petals lanceolate, ap- 

 pressed to the dorsal sepal; lip about 23 mm. long, saccate at 

 base, the claw slender, fimbriate, the limb V-shaped, bifid, 

 the lobes ascending, cuneate; column about 0.8 mm. long; 

 ovary pubescent. Reported to occur in Kyushu (Yaku- 

 shima) . ^Formosa. 



2. Odontochilus hatusimanus Ohwi & T. Koyama. 

 Hatsushima-ran. Stem slenderly terete, arising from a 



long-creeping base, 10-15 cm. tall, including the inflorescence; 

 leaves 4-6 on a stem, the blades ovate to ovate-elliptic, to 4 

 cm. long, 2 cm. wide, 3-nerved, fresh green, abrupdy short- 

 acute, rounded at base, the petiole patent, nearly 15 mm. long, 

 sheathing below; scape erect, slenderly terete, pubescent, with 

 few scales below the middle, terminated by a spikelike raceme 

 of 2 to 7 flowers; flowers white and pink-tinged, about 4 mm. 

 long; bracts lanceolate, light reddish, 2/3 as long as the ovary; 

 sepals pubescent outside, the central one ovate-acute, the lat- 

 eral ovate, 3.2 mm. long; petals appressed on the central 

 sepal, thin, elliptic, 3 mm. long; labellum patent, much ex- 

 serted, T-shaped, 5.5 mm. long, the hypochilus rounded-ciliate, 

 with a pair of horns inside, the mesochilus slenderly cylindric, 

 the epichilus 2-lobed, the lobes ovate-acute, 1.8 mm. long; 

 column 1.5 mm. long, with 2-fid rostellum and 2 appendages at 

 apex. July-Aug. Kyushu (Ohsumi). 



