Phyllagathis erythrotricha Merrill & Chun, Sunyatsenia 5: 147. 1940; P. xanthotricha Merrill & Chun; Scorpiothyrsus oligotrichus H. L. Li; S. xanthotrichus (Merrill & Chun) H. L. Li.

Shrublets, erect, to 20 cm tall. Stems 3-5 cm, 4-sided, sparsely hispid, basally ligneous. Petiole 4-8.5 cm, sparsely villous to long-hispid; leaf blades broadly ovate, elliptic, or rarely suborbicular, 8-20 × 3.5-14 cm, papery to submembranous, both surfaces sparsely strigose and furfuraceous, secondary veins 4 on each side of midvein, base cordate to subround, margin denticulate to serrulate, apex acute to subround. Inflorescences terminal, scorpioid cymose panicles, 7-19 cm, villous on nodes others sparsely villous and furfuraceous; peduncle 6-8 cm, 4-sided. Pedicel 1-2 mm, furfuraceous. Hypanthium campanulate, obtusely 4-sided, 2-2.5 mm, furfuraceous. Calyx lobes broadly triangular, ca. 0.5 mm, apex acute. Petals white or pink, suborbicular, 1.8-2 × 1.8-2 mm. Stamens 2-3 mm; anthers oblong, 1-1.5 mm, base minutely tuberculate; connective decurrent and abaxially minutely spurred. Ovary ovate, apex retuse. Capsule ovoid; hypanthium 2-3 × 2-4 mm, 4-sided, inconspicuously 8-ribbed, furfuraceous, apex truncate; calyx lobes usually persistent. Fl. and fr. Apr-May.

● Sparse to dense forests, mountain slopes, shaded places; 600-1400 m. Hainan (Baoting, Ledong).