ORCHIDACEAE - China

ORCHIDOIDEAE 813b. Dorsal sepal 3.8–4.1 × 1.8–2 mm; lip Y-shaped, 11.2–12.2 mm, without lacunae at apex; lobesof epichile subquadrate, 3.2–4 × 2.8–3.2 mm ..................................................................................... 2. O. guangdongensis1b. Plants autotrophic, leafy, green, dark green, greenish brown, or dark greenish purple.4a. Sepals uniformly green or yellowish green, sometimes tinged red toward apex; hypochile of lipbisaccate, divided by a central longitudinal septum.5a. Lip mesochile lacking flanges ............................................................................................................................ 4. O. crispus5b. Lip mesochile with a fimbriate-pectinate flange along each external margin.6a. Floral bracts ca. 5 mm, much shorter than ovary; ovary and pedicel pubescent ........................................ 5. O. elwesii6b. Floral bracts 8–15 mm, subequal in length to or exceeding ovary; ovary and pedicel glabrous.7a. Adaxial surface of leaves uniformly dark green; flowers white or yellowish white; lateralsepals 9–10 mm ................................................................................................................................ 6. O. brevistylis7b. Adaxial surface of leaves dark green with whitish stripes along midvein and 2 lateralveins; flowers yellow; lateral sepals 6–7.5 mm ............................................................................. 7. O. lanceolatus4b. Sepals white, pale green, or purplish with either dark brownish green patches or purplish red longitudinalstripes; hypochile of lip globose-saccate (though hypochile of O. clarkei occasionally shallowly 2-lobed),aseptate.8a. Plants 7.5–8.5 cm tall; leaf petiole-like base and tubular sheath 0.3–0.5 cm; lip 12–13 mm .................. 8. O. nanlingensis8b. Plants 10–30 cm tall; leaf petiole-like base and tubular sheath 1.5–3.5 cm; lip 17–26 mm.9a. Lip epichile lobes ca. 5.5 mm ........................................................................................................................ 9. O. tortus9b. Lip epichile lobes ca. 10 mm.10a. Flowers erect, not resupinate; ovary and pedicel not twisted; lip uniformly white; mesochile9.5–16 mm, not dilated at base ......................................................................................................... 10. O. inabae10b. Flowers resupinate; ovary and pedicel twisted; mesochile ca. 5 mm, dilated at base, reddish;epichile lobes yellow ......................................................................................................................... 11. O. clarkei1. Odontochilus poilanei (Gagnepain) Ormerod, Lindleyana17: 225. 2002.齿 爪 齿 唇 兰 chi zhao chi chun lanEvrardia poilanei Gagnepain, Bull. Mus. Natl. Hist. Nat.,sér. 2, 4: 596. 1932; Chamaegastrodia poilanei (Gagnepain)Seidenfaden & A. N. Rao; Evrardiana poilanei (Gagnepain)Averyanov; Evrardianthe poilanei (Gagnepain) Rauschert;Hetaeria poilanei (Gagnepain) Tang & F. T. Wang.Plants holomycotrophic, 12–18 cm tall. Rhizome yellowishwhite, short, stout. Stem erect, purplish red, stout, leafless,with many sheathing scales; scales overlapping, purplishred, membranous, pubescent on outer surface and margin.Rachis 3–7 cm, subdensely several to more than 10-flowered,pubescent; floral bracts purplish red, ovate, ca. 10 mm, ca. aslong as ovary, outer surface pubescent, apex acuminate. Flowersfragrant, erect, not resupinate; ovary and pedicel purplishred, cylindric-fusiform, not twisted, 10–12 mm, pubescent. Sepalspurplish red, pubescent on outer surface; dorsal sepal conniventwith petals, ovate, cymbiform, ca. 7 × 4 mm, 1-veined,apex subacute; lateral sepals slightly spreading, ovate, oblique,ca. 7 × 3.3 mm, apex acute. Petals purplish red, linear-lanceolate,oblique, falcate, ca. 7 × 1.5 mm, 1-veined, apex acute; lipdeep yellow, T-shaped, ca. 16 mm; hypochile slightly dilated,concave-saccate, ca. 2 mm, aseptate, containing 2 sessile,domed calli at base; mesochile 6–8 mm; flanges narrow, irregularlyerose-crenulate; epichile transversely dilated, ca. 3 × 12mm wide, 2-lobed, with 2 hornlike, divergent, V-shaped lacunaeat apex; lobes diverging at right angles to axis of lip,oblong, ca. 5 × 2.5 mm, minutely papillate on both surfaces,margin incised-erose, apex truncate. Column short, with 2 subsquare,lamellate wings; anther ovoid, ca. 2.5 mm, apex acuminate;rostellum erect, furcately 2-lobed. Fl. Aug.Damp places in broad-leaved evergreen forests, valleys; 1000–1800 m. SE Xizang, SE Yunnan [Japan, Myanmar, Thailand, S Vietnam].2. Odontochilus guangdongensis S. C. Chen, S. W. Gale &P. J. Cribb, nom. nov.广 东 齿 唇 兰 guang dong chi chun lanReplaced synonym: Chamaegastrodia nanlingensis H. Z.Tian & F. W. Xing, Novon 18: 261. 2008, not Odontochilusnanlingensis (L. P. Siu & K. Y. Lang) Ormerod, Taiwania 48:91. 2003 [see p. 83].Plants holomycotrophic, 20–26 cm tall. Rhizome hazel incolor, translucent, fleshy, slender, up to 25 cm; roots coralloid.Stem erect, light brown, slender to stout, leafless, with manysheathing scales; scales overlapping, brick-red, membranous,puberulent along margin. Rachis up to 6 cm, subdensely 4–9-flowered, puberulent; floral bracts maroon, ovate-lanceolate, ca.8 × 3.2 mm, ca. as long as ovary, outer surface puberulent, apexacuminate. Flowers not resupinate; ovary and pedicel fusiform,not twisted, ca. 8 mm, finely puberulent. Sepals fawn-colored,puberulent on outer surface and densely so at apex; dorsal sepalconnivent with petals, ovate, cymbiform, 3.8–4.1 × 1.8–2 mm,1-veined, apex acute; lateral sepals slightly spreading, narrowlyovate-falcate, oblique, 7–7.2 × 3.2–3.5 mm, 2-veined, apexacute. Petals fawn-colored, linear-lanceolate, oblique, falcate,4.5–4.8 × 1–1.3 mm, 1-veined, apex acute; lip yellow, Y-shaped, 11.2–12.2 mm; hypochile slightly dilated, concavesaccate,2–2.2 mm, containing 2 sessile, subglobose calli atbase; mesochile ca. 5.5 mm; flanges narrow, irregularly erosecrenulate;epichile transversely dilated, 3.2–4 × ca. 7 mm, 2-lobed; lobes diverging at acute angle to one another, subquadrate,3.2–4 × 2.8–3.2 mm, margin slightly erose, apextruncate. Column short, with 2 oblong, lamellate wings; antherlanceolate, ca. 2 mm, apex acuminate; rostellum erect, furcately2-lobed. Capsule brick-red, ellipsoid, ca. 11 × 5 mm. Fl. Aug.