Phacellaria caulescens Collett & Hemsl.

This species is epiparasitic on Macrosolen cochinchinensis.

Plants 20-30 cm tall. Stems usually twisted, branched and rebranched, strong, terete, finely ridged, not flat, ca. 2.5 mm thick at base, ± tomentose at apex when young, gradually glabrous later. Flowers solitary, mostly unisexual (plants dioecious); bracts imbricate, slightly orbicular, rather large, ca. 1 × 0.8 mm, apex shortly acuminate, flat; bracteoles 2 or more, tiny. Male flowers not seen. Female bud globose, ca. 1.3 mm in diam.; perianth ellipsoid to ellipsoid-cylindric, small, lobes 4-6, triangular. Discs rather flat. Style short. Drupe yellow, sessile, ovoid-ellipsoid, 5-6 × ca. 2 mm, basal part slightly condensed, apex with persistent, incurved lobes. Fl. May-Aug, fr. Oct-Dec.

Guangxi, Yunnan [Myanmar].

Forests; 900-2400 m.