二叶舌唇兰（中国高等植物图鉴）
Platanthera chlorantha Cust. ex Rchb. in Moessl. Handb. ed. 2, 2: 1565, 1828; Schltr. in Fedde Repert. Sp. Nov. Beih. 4: 109. 1919; S. Y. Hu in Quart. J. Taiwan Mus. 28(1-2): 131. 1975; 中国高等植物图鉴5: 616, 图8062.1976; 秦岭植物志1 (1): 401, 图388.1976; K. Inoue in J. Jap. Bot. 58(10): 314. 1983; 西藏植物志5: 689, 图360. 1987; K. Y. Lang in Bot. Res. Inst. Bot. 4: 8. 1989 et 6: 56. 1992; 横断山区维管植物2: 2520. 1994. ——Orchis ochroleuca Rchb. , Fl. Germ. Exc. 1: 120. 1830. ——Habenaria chlorantha(Cust. ex Rchb. )Bab. in Trans. Linn. Soc. 17: 462. 1836. ——Habenaria subulifera W. W. Smith in Not. Bot. Gard. Edinb. 13: 210. 1921. ——Platanthera subulifera(W. W. Smith)Schltr. in Fedde Repert. Sp. Nov. 20: 381. 1924. ——Platanthera freynii acut. non Kraenzl.: Clav. Pl. Chin. Bor. -Orien. ed. 1, 596. 1959.
Forests on slopes, grasslands; 400-3300 m. Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Xizang, Yunnan [Japan, Korea, Russia; W Asia, Europe].
P. freynii Kraenzl. was recorded in Flora of the USSR 4 : 659 by S. A. Nevskii ( 1935 ) as distributed to China, and its spurs are usually upward, strongly curved and crooked ; petal base lateral, not curved, suddenly narrowly linear upward. The distance of Chinese plants is horizontal or oblique downward extension, not up ; petal base unequal side, bending, upward gradually narrowed into a linear belong to this species. The former is not produced in China. |
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Leaves basal, subopposite, spatulate-elliptic or oblanceolate-elliptic, 10-20 × 3-8 cm, gradually contracted and sheathing at base, apex obtuse or acute. |
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Peduncle slender to robust, with 1-4 scattered, lanceolate bracts; rachis 7-23 cm, laxly to subdensely 9-32-flowered; floral bracts lanceolate, 10-22 mm, basal ones exceeding ovary, apex acuminate. Flowers fragrant, greenish white or white; pedicel and ovary arcuate, cylindric, 12-18 mm. Dorsal sepal erect, forming a hood with petals, ovate to orbicular-cordate, cymbiform, 5-7 × 5-6 mm, glabrous, 5-veined, apex obtuse; lateral sepals spreading, ovate, oblique, 7.5-8 × 4-4.5 mm, glabrous, 3-5-veined, apex acute. Petals narrowly ovate-lanceolate, oblique, 5-6 × 2.5-3 mm, 1-3-veined, apex acute; lip spreading to pendulous, ligulate, gradually tapering toward apex, 8-13 × ca. 2 mm, entire, apex obtuse; spur pendulous to spreading horizontally or sometimes arching upward, clavate-cylindric, 16-36 mm, exceeding ovary, conspicuously thickened toward apex, apex obtuse. Column stout; staminodes conspicuous; anther locules divergent; pollinia ellipsoid, with slender caudicles and orbicular viscidia; rostellum broad, tapelike; stigma lobes confluent, concave, lying directly below rostellum. Fl. Jun-Aug, fr. Jul-Sep. 2n = 42. |
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