ORCHIDACEAE - China

EPIDENDROIDEAE 505stout, footless; rostellum short; pollinia 2, waxy, subglobose to ovoid, entire, attached by a common linear stipe to a solitary ovateviscidium.Eleven species: India, Thailand, and Peninsular Malaysia, north to Taiwan and the Philippines, south to Indonesia, east to New Guinea,Australia, and the Pacific islands; one species (endemic) in China.The genus Tuberolabium has been monographed by J. J. Wood (Nordic J. Bot. 10: 481–486. 1990).1. Tuberolabium kotoense Yamamoto, Bot. Mag. (Tokyo) 38:209. 1924.管 唇 兰 guan chun lanSaccolabium kotoense (Yamamoto) Yamamoto.Stems short, indistinct. Leaves 2–7, ± basal; blade oblongor oblong-elliptic, 6.5–16 × 2–4 cm, rather fleshy or thicklyleathery, apex obtuse and slightly bilobed. Inflorescence pendulous,10–15 cm, densely many small flowered; peduncle andrachis 4–5 mm in diam.; floral bracts broadly ovate-triangular,2–3 mm, sometimes denticulate toward apex. Flowers white,often tinged with yellow, lip lateral lobes purplish, mid-lobewhite with a central purplish patch and 2 purple basal swellings,spur white or pale green, sometimes with purplish stripes orspots, column purplish, rostellum white; pedicel and ovary 5–8mm. Dorsal sepal obovate-elliptic, 4.5–5.5 × 2.2–3 mm, concave,obtuse; lateral sepals obliquely obovate, 5–6 × 2.5–4 mm,obtuse. Petals oblong-spatulate, ca. 5 × 1.8 mm, obtuse; lipspurred, ca. 3 mm, 3-lobed; lateral lobes erect, subquadrate, 1–1.5 cm, obtuse to rounded; mid-lobe thickly fleshy, adaxiallyslightly depressed at base and with 2 swellings partly coveringspur entrance; spur conic, laterally compressed, ca. 2 mm. Column1–1.5 mm; rostellum ca. 0.3 mm. Fl. Dec–Feb. 2n = 30*.● Epiphytic on tree trunks in thickets. S Taiwan.192. PARAPTEROCERAS Averyanov, Bot. Zhurn. (Moscow & Leningrad) 75: 723. 1990.虾 尾 兰 属 xia wei lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. WoodHerbs, epiphytic, monopodial. Stems ascending or sometimes pendulous, short or elongate, enclosed in leaf sheaths. Leavesseveral to many, distichous, flat, jointed and sheathing at base, apex unequally bilobed. Inflorescences lateral, arching to pendulous,racemose, several to many flowered; peduncle and rachis ± fleshy. Flowers small. Sepals free; lateral sepals usually larger, baseadnate to column foot. Petals often smaller than sepals; lip immovably attached to end of column foot, spurred, 3-lobed; lateral lobeson both sides of spur entrance, ascending, rather large; mid-lobe ± spreading forward, very small; spur often spreading horizontally,almost continuing line of column foot, ± laterally compressed, narrowed toward tip, thickly walled especially near base of mid-lobe,without appendages inside. Column short, thick, with a distinct foot; rostellum short, 2-lobed; pollinia 2, waxy, subglobose, entire,attached by a common broad and flat stipe to a solitary viscidium.About five species: mainly in SE Asia; one species in China.1. Parapteroceras elobe (Seidenfaden) Averyanov, Bot. Zhurn.(Moscow & Leningrad) 75: 723. 1990.虾 尾 兰 xia wei lanPteroceras elobe Seidenfaden, Bot. Tidsskr. 65: 149. 1969;Tuberolabium elobe (Seidenfaden) Seidenfaden.Stems 2–12 cm, 4–5 mm in diam., internodes 5–8 mm.Leaves many; leaf blade oblong or falcate-oblong, 6–17 × 1.5–2.5 cm, acute. Inflorescences 2–8, borne opposite leaves, 8–23cm, laxly many flowered; peduncle and rachis yellowish green,ca. 2 mm in diam., longitudinally ribbed; rachis 4–11 cm; floralbracts broadly ovate, ca. 1 mm. Flowers white, tinged with purplishon lip, spur white with purplish red tip; pedicel and ovary8–10 mm. Sepals and petals thinly textured; dorsal sepal ovateelliptic,ca. 4.5 × 2.7 mm, obtuse; lateral sepals obovate, ratherlarge, ca. 5 × 3 mm, rounded. Petals obovate-elliptic, ca. 4 × 2.5mm, obtuse; lip spurred, 3-lobed; lateral lobes ascending, suboblong,ca. 2 × 1 mm, obtuse; mid-lobe very small, ca. 0.4 mm,slightly fleshy, base with 2 calli on both sides; spur conic, ca.2.5 mm, obtuse. Column ca. 1 mm, foot ca. 2.5 mm. Fl. Jul.Epiphytic on tree trunks at forest margins; 1000–1500 m. Hainan,S Yunnan [Thailand, Vietnam].193. PENNILABIUM J. J. Smith, Bull. Jard. Bot. Buitenzorg, sér. 2, 13: 47. 1914.巾 唇 兰 属 jin chun lan shuChen Xinqi ( 陈 心 启 Chen Sing-chi); Jeffrey J. WoodHerbs, epiphytic, small, monopodial. Stems short, with a few close leaves. Leaves clustered, flat, elliptic to oblong, ± fleshy,base often ± twisted, jointed and sheathing, apex unequally laterally bilobed. Inflorescence lateral, racemose, usually rather short,unbranched, with 1 or 2 flowers open at a time, placed in 2 rows; rachis somewhat thickened and complanate; floral bractsdistichous. Flowers opening successively, lasting 1 or 2 days, white, cream-colored, yellow, or orange, medium-sized. Sepals andpetals free, similar. Petals slightly smaller, margin often dentate; lip adnate to column base, immovable, spurred, 3-lobed, internalcallosities absent; lateral lobes either rather large, well developed, and truncate or reduced to small earlike lobes, when present often