Habenaria subarmata Rchb.f., Otia Bot. Hamburg. 2: 98 (1881).
Homotypic Synonyms:

Arachnaria subarmata (Rchb.f.) Szlach., Richardiana 3: 157 (2003).
Description:

Robust terrestrial herb 30–60 cm tall; tubers 1–2 cm long, ± globose, pubescent. Stem erect, with 2 basal leaves and 6–10 bract-like leaves along its length. Basal leaves appressed to the ground, 7.5–16 × 7–22 cm,reniform to suborbicular, apiculate to slightly emarginate, pale green, rather fleshy; bract-like leaves up to 5 cm long. Inflorescence 10–27 × 5–9 cm, densely 12- to many-flowered; bracts 10–20 mm long, lanceolate, acute. Flowers white, semi-erect or spreading.Pedicel 10 mm long, ovary 25–30 cm long with 6 lightly toothed keels. Dorsal sepal erect, 7.5–11 × 4–6 mm, ovate, convex; lateral sepals reflexed, 10–12 × 4–6 mm, very obliquely ovate. Petals 2-lobed to base; posterior lobe 7.5–9.5 × c. 1 mm, linear, lying beside dorsal sepal; anterior lobe 25–40 mm long, filiform, spreading or deflexed. Lip 3-lobed to 1–2 mm from base; mid-lobe 12–18 × 1 mm, linear, deflexed; side lobes 25–50 mm long, filiform, ± deflexed; spur 5–7.5 cm long, slender, incurved. Anther 4.5–7.5 mm high, erect, apiculate; canals upcurved, 3–4 mm long. Stigmatic arms 5–7 mm long, porrect, club-shaped, truncate at apex.
Notes:

This species closely resembles Habenaria armatissima, differing only in the slightly smaller flower and shorter spur.
Habitat:

Dry deciduous woodland 350–1200 m.
Distribution:

Somalia to Namibia