Orchidaceae 321 



5 1 A. Flowers in racemes; stems thickened at base; leaves 1-3 cm. wide 50. Oreorchis 



5IB. Flower solitary; stems not thickened at base; leaves 3-4 cm. wide 51. Dactylostalix 



45B. Leaves conduplicate in bud. 

 52A. Stems sympodial. 



53A. Column produced into a distinct foot; pollinia unappendaged or with a caudicle. 

 54A. Stem or pseudobulb with several joints. 



55A. Pollinia 4, without caudicles; stems 5-40 cm. long 52. Dcndrobium 



55B. Pollinia 8, with caudicles; stems usually shorter 53. Eria 



54B. Stem with a single joint or pseudobulb; plants commonly with a long-creeping rhizome 54. Bulbophyllum 



53B. Column without a foot; pollinia 2, with a caudicle; stems abbreviated, concealed by a tuft of leaves; leaves long linear. 



55. Cymbidium 

 523. Stems monopodial; inflorescence lateral. 



56A. Lip not spurred; leaves terete 56. Ltiisia 



56B. Lip spurred. 



57A. Plant without leaves (in our species) ; stems very abbreviated 60. Taeniophyllum 



57B. Plant with green leaves. 



58A. Column with a definite foot. 



59A. Spur straight 62. Sarcochilus 



59B. Spur incurved under the lip 61. A'erides 



583. Column without a foot. 



60A. Spur divided within by a longitudinal septum 57. Sarcanthtis 



603. Spur not divided by a longitudinal plate. 



61A. Lip with a saccate (mostly short) spur 58. Saccolabium 



61B. Lip with a very slender, elongate, curved spur 59. Neofinetia 



1. APOSTASIA Bl. Yakushima-ran Zoku 



Terrestrial herbs with short rhizomes; stems erect, loosely leaved; leaves rather narrow, nerved; inflorescence a spike, terminal 

 and axillary from upper nodes, sometimes branched; flowers small, nearly actinomorphic, subtended by a narrow bract; 

 perianth-segments nearly equal, free; column short; anthers 2, stalked, erect, on both sides of rostellum, the locules parallel, 



contiguous; pollinia viscid; rostellum apical, erect; ovary 3-locular; capsule linear. Few species, in the Tropics of India, 



China, Malaysia, and Australia. 



1. Apostasia nipponica Masam. Yakushima-ran. Gla- acuminate to acute; perianth-segments lanceolate, about 3.5 



brous herb about 6 cm. high; leaves few, cauline, lanceolate, mm. long, 1 mm. wide, acuminate.— -July. Kyushu (Yaku- 



long-acuminate, about 2 cm. long, 5 mm. wide; spikes 2-3; shima) ; very rare, 

 flowers 2-3, the bracts ovate, about 4 mm. long, 1.5 mm. wide, 



2. CYPRIPEDIUM L. Atsumori-so Zoku 



Terrestrial herbs with short, creeping rhizomes and rather stout fibrous roots; stems (in ours) leafy, 1- to few-flowered; 

 leaves few, sometimes opposite, many-nerved, sometimes plicate; flowers usually large, showy, zygomorphic; sepals spreading, 

 free or die 2 lateral united; petals spreading, narrow; lip large, saccate or pouch-shaped; column incurved, with a short-stalked, 

 2-loculed anther on each side, and a dilated, rather petallike staminode adnate to the back at tip; stigma terminal, obsoletely 

 3-lobed. About 40 species, in the temperate regions of the N. Hemisphere, one in the American Tropics. 



lA. Leaves 2, ovate-rounded to rounded -cord ate, subopposite, not sheathed, flat, not plicate, 2- to 5(-7)-nerved; flowers 2-2.5 cm. across; 



bracts broadly linear; stems and ovaries glabrous 1. C. debile 



IB. Leaves oblong-elliptic to flabellate, or orbicular, 2 to several, alternate or opposite, many-nerved, plicate; flowers larger; bracts broader; 

 stems and ovaries usually pubescent. 

 2A. Leaves 2, nearly opposite, not at all or slightly sheathed at base; flowers yellowish brown. 



3A. Leaves roundcd-flabellate, with parallel nerves not converging at tip 2. C. japonicum 



3B. Leaves oblong-elliptic, nerves converging at tip 3. C. yalabeanum 



23. Leaves 3-5, oblong-elliptic, alternate; flowers rose to rose-purple, rarely white 4. C. macranthum 



1. C>'pripedium debile Reichenb. f. C. cardiophyllum pendulous, glabrous; perianth-segments acute with an obtuse 



Fr. & Sav. Ko-atsumori-s6. Small, glabrous perennial tip, about 1.5 cm. long; dorsal sepal narrowly ovate, the lateral 



with slender, short-creeping rhizomes and elongate roots cov- ones wholly united to the tip; petals broadly lanceolate; lip 



ered with prominent root-hairs; stems 10-20 cm. long, gla- slighdy shorter than the petals. May-June. Woods in 



brous, with 2 or 3, diinly membranous scaly sheaths at base; mountains; Hokkaido (s. distr.), Honshu, Shikoku. 

 leaves 2, opposite, sessile, not sheathed, flat, rounded-cordate, 2. Cypripedium japonicum Thunb. Kumagai-so. Rhi- 

 3-5 cm. long and as wide, glabrous except on the margins, 2- zomes long-creeping, with rather stout roots from the nodes; 

 to 5(-7)-nerved, acute to short-acute, rounded to slightly stems 20-40 cm. long, with spreading, crisped hairs and few 

 cordate at base; peduncle solitary, terminal, strongly declined, membranous sheathing scales at base; leaves 2, nearly op- 

 glabrous, 2-3 cm. long; bracts broadly linear, 1.5-2 cm. long; posite, near apex, many-nerved, plicate, pilose on the nerves, 

 flowers 2-2.5 cm. across, yellowish green with a purple hue, flabellate-suborbicular, 10-15 cm. long, 12-20 cm. wide, trun- 



