Orchidaceae 



341 



narrow, often closely appressed to and forming a hood with the dorsal sepal; lip erect, from the base of the column, saccate at 

 base, with callosc protuberances within, the margin often adnate to the lower margin of the column, the limb entire or bifid; 

 column short, with 2 appendages in front; stigma broad, bilobed, depressed, with protuberances on the lower margins; anther- 

 locules separate; pollinia sectile, with caudicles; capsules erect. About 65 species, in Malaysia, Polynesia, India, and se. Asia. 



lA. Stems with green leaves. 



2A. Lateral sepals about 3 mm. long, ovate, semi-open at anthesis 1. H. yal^iisimensis 



2B. Lateral sepals about 5 mm. long, lanceolate, fully open at anthesis 2. H. xenantha 



IB. Aphyllous saprophyte, without chlorophyll, wholly glabrous 3. H. sil{,oltiana 



1. Hetaeria yakusimensis (Masam.) Masam. Zeuxine one ovate, 5 mm. long, acute, reddish or brownish green out- 



yal{tiswiensis Masam. Yakushima-aka-shusu-ran. Terres- side, die lateral lanceolate, 5 mm. long, gradually attenuate, 



trial, red-brown when dry; stems erect from a short-creeping olive-green outside; petals forming a hood with the central 



base, 10-15 cm. long, 2- to 5-leaved near the base, glabrous to- sepal, 4.5 mm. long, thin, elliptic-ovate, white; labellum coni- 



ward the base, short-pilose on the upper part; leaves obovate or cal-ovoid, ascending, 4.5 mm. long, 2 mm. wide, white, gla- 



ovate, about 3 cm. long, 1.5 cm. wide, acute, glabrous, rounded brous, with a pair of hooked processes inside the saclike base, 



at base, the petioles about 2 cm. long, sheathing at base; in- the limb 3-lobed, the lateral lobes papillose, involute; column 



florescence about 10 cm. long, loosely 6- to 10-flowered; bracts including rostellum 2.8 mm. long, with an enlargement on 



1-nerved, membranous, ciliate, as long as the ovary; median each side. Aug.-Sept. Wet evergreen woods; Kyushu (Oh- 



sepal broadly ovate, acute, about 3 mm. long, the lateral sepals sumi). 



oblique-oblong; petals subovate, obtuse; lip cucullate-ovate, as 3. Hetaeria sikokiana (Makino & F. Maekawa) Tuyama. 



long as the sepals, with 2 callose protuberances within; column Chamacgastrodia sikp}{iana Makino & F. Maekawa Hime- 



widi 2 winglike ridges within. Sept. Woods in moun- no-yagara. Plants pale brown, saprophytic, without green 



tains; Kyushu (s. distr., incl. Yakushima); rare. leaves; rhizomes rather thick, creeping, branching, with small 



2. Hetaeria xenantha Ohwi & T. Koyama. Osumi- loose scales; stems erect, rather fleshy, 5-15 cm. long, glabrous, 

 KiNu-RAN. Stem arising from a long creeping base, terete, with loose scales; leaves scalelike, 4-10 mm. long, thinly mem- 

 glabrous, including the inflorescence 8-15 cm. tall; leaves 3 to branous, subobtuse, 1-nerved, sheathing at base; inflorescence 

 7 on a stem, broadly ovate or elliptic, to 4 cm. long, abruptly 2-3.5 cm. long, 5- to 10-flowered; bracts ovate-oblong or ovate, 

 acute, upper surface deep green, velvetlike, the petiole to 1 5-8 mm. long, erect; sepals obtuse, 1-nerved, 3-4 mm. long; 

 cm. long, the lower half sheathing; scape wiry, wholly pubes- petals narrowly oblong, the hp about 6 mm. long, saccate- 

 cent, with 2 or 3 scales below the middle, terminated by a 4-5 inflated at base, with 2 globose callosities within, the limb T- 

 cm. long spikelike raceme of 3 to 6 remote flowers, the bracts shaped; column with 2 horn-shaped appendages on the inner 



scalelike, lanceolate, as long as or slightly shorter than the surface. June-July. Honshu (Rikuzen Prov. and soudiw.), 



ovary, ciliate on the upper margin; sepals glabrous, the median Shikoku, Kyushu; rare. 



30. CHEIROSTYLIS Bl. 



Kairo-ran Zoku 



Small, terrestrial herbs from creeping rhizomes; stems leafy at base, with scalelike leaves in the upper part; inflorescence 

 racemose, loosely flowered, bracteate; flowers rather small, usually short-pedicelled; sepals at the base more or less united into a 

 tube becoming 3-lobed above the middle; petals 2, free, closely appressed to the inner side of the dorsal sepal; lip saccate-inflated, 

 with two protuberances on the inside, the limb bifid, entire or toothed; column short, with an appendage near the rostellum 

 on each side; pollinia caudiculate, bilobed in each locule; stigma lateral, bilobed. About 20 species, in tropical and sub- 

 tropical regions of Asia and Africa. 



1. Cheirostylis okabeana Tuyama. Tanegashima-kai- 

 Ro-RAN. Stems 10-20 cm. long, slightly fleshy, from creeping 

 rhizomes, 4- to 6-leaved toward the base; leaves oblong-ovate 

 to broadly ovate, 7-20 mm. long, 5-12 mm. wide, acute, 

 mucronate, glabrous, red-brown when dry, slighdy fleshy, the 

 petioles 5-10 mm. long, broadened and short-sheathing at base; 

 peduncles with white recurved hairs, the scales 2 or 3, remote, 

 appressed, sheathing at base; racemes short, 2- to 5-flowered, 



the bracts 5-7 mm. long, lanceolate; ovary white-pubescent, 

 subsessile; flowers small; sepals slightly united below into a 

 tube, the lobes or segments to 3.7 mm. long, the dorsal lobe 

 slightly shorter; lip nearly included, with 2 callosities on inner 

 side of inflated lower part, the limb T-shaped, the lobes ovate, 



entire, obtuse. Woods in mountains; Kyushu (Tanega- 



shima) ; very rare. 



31. VEXILLABIUM F. Maekawa Hakuun-ran Zoku 



Small terrestrial herbs; stems long-creeping; leaves small, ovate, the petioles sheathing at base; inflorescence scapose, erect, 

 spicate, few-flowered; flowers small, white, the bracts membranous; calyx campanulate, slightly pubescent outside; petals as long 

 as and appressed to die dorsal sepal; lip slighdy exserted, saccate-inflated at base, with 2 protuberances within, the claw 

 slender, short and entire, the limb triangular to quadrangular or oblong; spur bilobulate; column erect, nearly terete, die ros- 

 tellum unequally bifid, minutely papillose; pollinia sectile. About 4 species, in Japan and Korea. 



lA. Sepals distinctly connate toward base. 

 2A. Limb of lip quadrangular-oblong, truncate or rctusc; leaves less than 7 mm. long. 

 3A. Leaves 3-7 mm. long; spikes I- to 4-flowered 



1. V. nakaiantim 



