Styloglossum caulescens (J.J.Sm.) T.Yukawa & P.J.Cribb, Bull. Natl. Mus. Nat. Sci., ser. B, 40(4) (2014) 147
Type: Kock, de 144 (holo BO)
- Calanthe caulescens J.J.Sm., Bull. Jard. Bot. Buitenzorg, sér. 2, 2 (1911) 2
- Calanthe apostasioides Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 377
- Type: Schlechter 18731 (holo B, lost); Neotype: Brass 30937 (holo L; iso K)
- Calanthe salmoniviridis P.Royen, Alp. Fl. New Guinea 2 (1979) 134, fig. 56
- Type: Brass 9055 (holo L)
Terrestrial or epiphytic herb, erect, 25-60 cm tall; rhizome decumbent, cauliform; roots flexuous, elongate, terete, shortly tomentose. Stem unbrached, elongated, terete, glabrous, densely leafed, covered with sheaths and their fibrous remnants, margins of sheaths crenulate. Leaves erect to spreading, lanceolate to elliptic-lanceolate, acuminate, narrowed in basal part, base sheathing; lamina (6-)10-18 by 1.0-2.2(-3.2) cm. Inflorescence lateral, erect, sublax, 4-10-flowered. Floral bracts erect to suberect, elliptic, acuminate, shorter than the flowers. Flowers erect, rather small, glabrous. Median sepal obovate to oblong, rounded or acute to minutely apiculate, 0.8-1.1 by 0.35-0.45 cm, concave, with glands in upper half. Later sepals oblique, 0.75-1 by 0.35-0.45 cm. Petals spathulate to elliptic, obtuse, oblique, 0.7-1 cm by 0.35-0.5 cm. Lip curved, lamina small, broadly oblong-ligulate, apical margins inrolled; lateral lobes basal, minute, rounded; immature flowers lack a callus, mature flowers with a transverse thickening across the mouth of the spur which in some flowers becomes a fleshy callus; spur deflexed, cylindrical, obtuse, slightly narrowed at the base, (0.2-)0.66-0.88 cm long. Column adnate to margin of lip, sometimes slightly dilated towards apex; rostellum short, emarginate. Anther subtruncate, glabrous; pollinia 8, oblique, clavate. (After Thomas, 1999).