Orchidaceae 



353 



1. Dactylostalix ringens Reichenb. f. Pergamcna uni- 

 flora Finet; Calypso japonica Maxim, ex Komar.; D. maculosa 

 Miyabe & Kudo Ichiyo-ran. Rhizomes creeping, slen- 

 der; leaves solitary, radical, ovate, 3-6 cm. long, 3-4 cm. wide, 

 subobtuse, obtuse to rounded at base, petiolate; scapes 10-20 

 cm. long, widi 2 or 3 short sheaths on lower half; flowers 

 solitary, the bracts thinly membranous, quadrangular-elliptic 

 to ovate, 2-3 mm. long; sepals and petals pale green, oblanceo- 

 late to linear-lanceolate, 2-2.5 cm. long, subobtuse, ascending, 

 3-nerved; lip erect, ovate, cuneate, 3-lobed, the lateral lobes 



broadly ovate, 2-3 mm. long and nearly as broad, obtuse, 

 purplish on upper half, the terminal lobe obovate-rounded, 

 recurved, about 7 mm. long and as wide, white with purple 

 spots, more or less undulate on the margins, with 2 short ribs 

 near the base; spur absent; column about 10 mm. long, flat, 

 narrowly cuneate-oblong, rather broadly winged; ovary 3- 

 angled; capsules clavate-fusiform, short-pedicelled, about 2 cm. 

 long, ascending. May-July. Woods in mountains; Hok- 

 kaido, Honshu, Shikoku. 



52. DENDROBIUM Sw. 



Sekkoku Zoku 



Tufted epiphytic herbs; stems usually elongate, leafy, terete, nodose, fleshy, with tight and persistent leaf-sheaths; leaves sub- 

 coriaceous, flat; flowers 1 to several, relatively large, in racemes or fascicles, the bracts minute or absent; sepals more or less 

 alike, the dorsal free, the lateral ones oblique at the base and adnate to the base of the column, often forming a spurlike chin; 

 petals similar to the dorsal sepal; lip attached to the base of the column-foot, narrowed at base, often 3-lobed, the limb often with 

 2 to 3 series of elevated ribs; column short, usually winged; anther terminal, 2-locular, poUinia 4 in each cell, waxy; capsules 

 ovoid to oblong. About 1,000 species, in India, Malaysia, s. Asia, and Australia. 



lA. Flowers 1 or 2, white or pale rose, fasciculate; dorsal sepal and petals 2-2.5 cm. long \. D. moniUjorme 



IB. Flowers 3 to 8, pale greenish yellow, loosely racemose; dorsal sepal and petals 12-15 mm. long 2. D. tosaense 



1. Dendrobium moniliforme (L.) Sw. Epidendrum 

 moniliforme L.; E. monile Thunb.; Oncidium japonicwn BL; 



D. monile (Thunb.) Kraenzl. Sekkoku, Sekikoku. 



Stems tufted, erect, 5-25 cm. long, terete, the internodes 2-4 

 cm. long, 3-6 mm. in diameter, covered by a tight membra- 

 nous sheath; leaves lanceolate, 4-7 cm. long, 7-15 mm. wide, 

 obtuse, rounded at the base; flowers 1 or 2 in the upper nodes 

 of 3-year old stems, fasciculate, pedicelled, white or pale rose, 

 fragrant, the minute bracts basal; dorsal sepal lanceolate, 2-2.5 

 cm. long, 5-7 mm. wide, acute, the lateral ones obliquely 

 broadened at base; petals similar to the dorsal sepal, slightly 

 shorter; lip cuneate, erect to ascending, the limb slightly re- 

 curved at tip, about as long as the petals, narrowly ovate-tri- 

 angular, acute; column very short, about 2 mm. long on the 

 back, the chin in front about 8 mm. long. May-June. Epi- 

 phytic on tree-branches and rocks in mountains; Honshu 

 (centr. and s. distr. incl. Izu Shichito Isls.), Shikoku, Kyushu; 

 rather rare. s. Korea and China. 



2. Dendrobium tosaense Makino. Kibana-no-sekkoku. 

 Stems tufted, 25-40 cm. long, terete, the internodes 2-6 cm. 

 long; leaves lanceolate, 2-7 cm. long, 7-17 mm. wide, acute to 

 subobtuse, rounded to obtuse at the base and jointed at the 

 attachment with the sheath; racemes 4-7 cm. long, from the 

 upper nodes of 2- to 3-year old stems, short-pedunculate, the 

 axis slender, flexuous, the bracts linear-lanceolate, 3-6 mm. 

 long, acute; flowers 3-8, pale greenish yellow, loosely race- 

 mose; dorsal sepal broadly lanceolate, 12-15 mm. long, acute; 

 petals similar, 10-12 mm. long, the chin about 10 mm. long; 

 lip ascending, the limb nearly as long as the sepals, slightly 

 recurved at the tip, ovate, acute, narrowed to the base, with a 

 few short dark purple striations at the center below; column 

 pale green, rounded on the back, 3-4 mm. long, with dark 



purple spots within. July-Nov. Epiphytic on tree 



branches; Shikoku, Kyushu; rather rare. Ryukyus. 



53. ERIA Lindl. Osa-ran Zoku 



Epiphytic herbs with short rhizomes and pseudobulbs (stems); stems 2- to several-leaved; scapes 1- to many-flowered; flowers 

 relatively small, in racemes, the bracts narrow; sepals equal, the dorsal lobe free or united with the lateral lobes at base, the 

 lateral sepals forming a spurlike chin at the base and adnate with the column-foot; petals siiiiilar to the dorsal sepal; lip joined 

 with the foot, recurved at tip, entire or with a small lateral lobe on each side; column short, concave in front, often wing- 

 margined, the base elongate, simulating a foot in front; anther terminal, the locules 2, distinct, incompletely 4-septate; pollinia 8, 

 4 in each locule, on 2 glands, with caudicles; capsules oblong to linear. About 400 species, in e. Asia, Malaysia, and India. 



lA. Pseudobulbs 1-2.5 cm. long, 5-10 mm. in diameter; leaves 4-8 cm. long; fiowers 1 or 2, the peduncle naked, scapose; terminal lobe 

 of lip 3-ribbed 1. E. reptans 



IB. Pseudobulbs 1-6 cm. long, 5-25 mm. in diameter; leaves 8-30 cm. long; flowers 10-16, the peduncle few-scaled, scapiform; terminal 

 lobe of lip 5-ribbed 2. E. yalitishimensis 



1. Eria reptans (Fr. & Sav.) Makino. Dendrobium rep- 

 tans Fr. & Sav.; E. japonica Maxim.; E. hoso\awae Hawkes & 



Heller Osa-ran. Pseudobulbs in a series on the short, 



creeping rhizomes, narrowly oblong-cylindrical to quadrangu- 

 lar-oblong, slightly flattened, 1-2.5 cm. long, 5-10 mm. in 

 diameter, red-brown, sheathed while young; leaves 2, narrowly 

 oblong to broadly lanceolate, 4-8 cm. long, 1.2-2 cm. wide, 

 acuminate, narrowed to the base and jointed witli the short 



sheaths, several-nerved, deciduous in autumn; scapes 1 or 2, 

 2-6 cm. long, with scattered short brown crisped hairs; flow- 

 ers 1 or 2, the bracts narrowly ovate, 3-4 mm. long; flowers 

 white; dorsal sepal and petals free, broadly lanceolate, 8-10 

 mm. long, subobtuse, slightly incurved at tip, the lateral sepals 

 forming a chin 3^ mm. long at base; lip rather short, broadly 

 cuneate, 3-ribbed within, pale reddish brown in the center, 

 retuse, the lateral lobes relatively small, the terminal trans- 



