全唇线柱兰 quan chun xian zhu lan

Hetaeria integrilabella (C. S. Leou) S. S. Ying.

Plants ca. 27 cm tall, slender. Rhizome usually short. Stem erect or ascending, pale reddish brown, 8-18 × 0.3-0.5 cm, 4- or 5-leaved. Leaves subrosulate, abaxially pale red, adaxially green with a silver-white stripe along midvein, oblong to ovate-elliptic, 2-7 × 1.5-3.5 cm, base obtuse or rounded, apex acute; petiole-like base pale purple, 0.5-1.7 cm including tubular sheath. Inflorescence to 15 cm, with 2 or 3 sterile bracts, tomentose, pale purple; rachis 8-14-flowered; floral bracts ovate, shorter than ovary, margin usually ciliate toward apex. Flowers resupinate; ovary and pedicel subcylindric, 7-8 mm, glabrous. Sepals pale brown, unequal in size, concave, glabrous; dorsal sepal elliptic, ca. 5.5 mm; lateral sepals oblong, ca. 5 mm. Petals white, falcate, 1-veined; lip rhombic, ca. 6 × 4 mm, entire, base contracted, not connate with column, lacking calli. Column 2.5-2.8 mm; wings low, triangular; anther ca. 2.2 mm; pollinia ca. 1.3 mm; rostellum arms ca. 1.2 mm. Fl. Apr.

● Broad-leaved forests; 1000-1800 m. C Taiwan.

The shape of the lip indicates that this taxon is a peloric mutant, with the presence of a silver-white stripe on the leaves and the low column wings suggesting an alliance to Zeuxine goodyeroides. More material is required on which to base a critical comparison.