Eriocaulon annamense
Annual or perennial herbs, Stems elongated and tough. Leaves linear, 13–18 × 0.2 cm, glabrous, acute. Scapes few, 30–40 cm long, glabrous, 6 (–7)-ribbed, strongly twisted. Sheaths 8–12 cm long, the mouth oblique, obtuse, glabrous. Head globose, 4–6 × 3–4 mm, white. Receptacle elongate, pilose. Involucral bracts shorter than head, spreading outward, broadly obovate-obicular, 1.5–2 × 1–1.3 mm, obtuse, glabrous, leathery, light brown. Floral bracts oblong to lanceolate, 2.2–2. 5 × 0.8 mm, acute to cuminate, leathery, brown. Male flowers: subsessile; sepals tubular or connate into spathe, distinctly 3-lobed, enclosing the petals, 2 mm long, glabrous or only hairs at tip, brown; petals 3, subequal, lanceolate, reflexed outward the sepal, ca. 0.3 mm long, black gland and hairy at tip, brown; stamens 6, anthers black. Female flowers: subsessile, pedicellate ca. 0.2 mm long; sepals 3, free, equal, elliptic, 2 × 0.5 mm, acute, hairy in the upper part, brown; petals 3, free, equal, lanceolate, 1.5–2.5 × 0.6 mm, acute, hairy at tip, black gland present, light brown; ovary sessile, 3-locular, stigmas 3. Seeds immature.