- ≡ Uncinia caespitosa var. minor Kük. in Cheeseman, Man. New Zealand Fl. 802 (1906)
- = Uncinia rupestris var. planifolia Kük., Pflanzenr. (Engler) 38 , 64 (1909)
- = Uncinia angustifolia Hamlin, 19: 42-43 (1959)
Loosely tufted with rather few culms. Culms (10)–15–35 cm. long c. 0.3 mm. diam. above, glab., 1–2 mm. diam. at base (including sheathing bracts); basal bracts light to dark brown, not shining. Lvs 3–4 per culm, < culms, from slightly > 0.5 mm. to 1.5 mm. wide, dark green, strongly scabrid on margins and upper surface. Spike 2–5 cm. × 2–3 mm., occ. bracteate, female fls 5–12, internodes up to 4 mm. long at base of spike, 1.5–2 mm. long above. Glumes us. c. ½ length of utricles, deciduous, ovate, acute or acuminate, hyaline with green midrib. Utricles 3.5–4.5–(5) × c. 1 mm., trigonous, green to grey-brown, lateral nerves strongly developed, otherwise smooth, occ. spreading when mature, beak 1–1.5 mm. long, stipe c. 1 mm. long.
[From: Moore and Edgar (1970) Flora of New Zealand. Volume 2. as Uncinia angustifolia Hamlin]
Flowering: Sep.–Oct.; Fruiting: Nov.–Dec.