22. Neottia chenii S. W. Gale & P. J. Cribb, Fl. China. 25: 191. 2009.
巨唇对叶兰 ju chun dui ye lan
Replaced synonym: Listera grandiflora Rolfe var. megalochila S. C. Chen, Acta Phytotax. Sin. 25: 473. 1987, not Neottia megalochila S. C. Chen, Acta Phytotax. Sin. 17(2): 17. 1979 [see p. 187]; L. megalochila (S. C. Chen) S. C. Chen & G. H. Zhu.
Plants autotrophic, 13-23 cm tall. Stem slender, usually with 1 sheath toward base. Leaves 2, opposite, borne near or above middle of plant, broadly ovate or ovate-cordate, 2.5-3.8 × 2.5-4 cm, apex subacute. Peduncle pubescent, with 1 or 2 sterile bracts 8-10 mm; rachis 3.5-6.5 cm, pubescent, 3-6-flowered; floral bracts ovate-lanceolate, 6-7 mm. Flowers resupinate, greenish yellow; pedicel and ovary 11-12 mm, nearly glabrous; sepals and petals spreading widely to reflexed. Dorsal sepal subelliptic, ca. 6.5 × 2.2 mm, apex subacute; lateral sepals elliptic-lanceolate, oblique, ca. 6.5 × 2 mm, apex subacute. Petals linear, ca. 6.5 × 1 mm; lip spreading forward, subobovate-oblong, 15-16 × 7-10 mm, slightly narrowing to ca. 5 mm wide at base, apex deeply 2-lobed; lobes subovate-oblong, 5-6 mm, margins minutely ciliate, apices truncate; disk with a V-shaped nectary at base. Column slightly arcuate, 6-7 mm. Fl. Jun-Jul.
● Forests; 2200-2800 m. S Gansu, W Sichuan.
The specific epithet honors the first co-author of the present treatment of Neottia.