Peristylus tetralobus Finet f. parceflorus Finet, Rev. Gén. Bot. 13: 525. 1901; Orchis parceflora (Finet) Handel-Mazzetti; O. tetraloba (Finet) Schlechter var. parceflora (Finet) Soó.

Plants 10-15 cm tall. Tubers subglobose, ca. 8 × 6 mm. Stem with 2 tubular sheaths at base, 1-leaved. Leaf cauline, porrect, linear to elliptic-lanceolate, ca. 3.5 × 0.4 cm, apex acute. Peduncle ebracteate; rachis 2-4 cm, laxly 3-5-flowered; floral bracts lanceolate, ca. 3 mm, much shorter than ovary, apex acute. Flowers rose-red; ovary and pedicel 7-9 mm. Dorsal sepal erect, ovate-oblong, slightly concave, 2-3 × ca. 1.3 mm, 1-veined, apex obtuse; lateral sepals spreading, oblong, slightly oblique, 2.2-3.5 × ca. 1.4 mm, 1-veined, apex obtuse. Petals erect or loosely connivent with dorsal sepal and forming a hood, ovate, oblique, 2-3 × ca. 1.7 mm, 1-veined, apex acute; lip oblong-obovate, 6-8 × ca. 4 mm, 3-lobed below middle; lateral lobes narrowly oblong, slightly falcate, 3-4 × ca. 1 mm, broadening slightly toward apex, apex truncate-obtuse; mid-lobe oblanceolate, ca. 5 × 3.5 mm, widening gradually from narrow base, deeply divided above middle to form 2 distinct lobules, sinus usually with a small tooth; spur pendulous, straight to slightly incurved, cylindric, 4-6 mm, shorter than ovary, attenuate toward apex, apex acute; viscidia suborbicular; stigma lobes oblong. Fl. Jul.

● Forests; ca. 2000 m. Chongqing, NE Sichuan.