Platycoryne protearum (Rchb.f.) Rolfe in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 7: 258 (1898).
Homotypic Synonyms:

Habenaria protearum Rchb.f., Otia Bot. Hamburg.: 57 (1878).
Heterotypic Synonyms:
Habenaria paludosa Rchb.f., Flora 48: 178 (1865), nom. illeg.
Habenaria ukingensis Schltr., Bot. Jahrb. Syst. 53: 494 (1915).
Platycoryne ukingensis (Schltr.) Summerh., Kew Bull. 13: 61 (1958).

Terrestrial herb 18–50 cm tall; tubers 10–20 × 5–10 mm, globose or ellipsoid. Leaves 4–8, the lowermost sheath-like, the next 2–3 above these 2–6 cm long and 3–8 mm wide, lanceolate, acute; the remaining leaves spaced out along the stem, erect, bract-like. Inflorescence laxly 1–5-flowered, up to 12 cm long. Flowers greenish-orange, erect. Pedicel 12–20 mm long, ovary arched, 12–15 mm long; bracts 17–22 mm long. Dorsal sepal erect, 6–8 × 3.5–6 mm, ovate, convex; lateral sepals deflexed, 6.5–8 × 2–3 mm, obliquely lanceolate. Petals 5–7 × 1.5–3.5 mm, obliquely triangular-lanceolate, adnate to dorsal sepal. Lip deflexed, 5–7 × 2.5–3 mm, entire, fleshy, convex, narrowly oblong; spur 2–3.5 cm long, slender but swollen towards apex, usually enclosed within the bracts. Anther 2.5–4.5 mm high, erect with a long apiculus; canals 2–3 mm long. Stigmatic arms projecting forwards, 2–2.5 mm long, stout. Rostellum 4–4.5mm high, placed in front of anther and overtopping it; mid-lobe acute, side lobes very short and shoulder-like

Tanzania to S. Trop. AfricaImages:
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Botanical Drawing / Herbarium
platycoryne protearum
Photograph copyright Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission.