Corycium bicolorum (Thunb.) Sw., Kongl. Vetensk. Acad. Nya Handl. 21: 222 (1800).
Homotypic Synonyms:
Ophrys bicolor Thunb., Prodr. Pl. Cap.: 2 (1794).
Pterygodium bicolorum (Thunb.) Schltr., Bull. Herb. Boissier 6: 851 (1898).
Heterotypic Synonyms:

Pterygodium mundii Schltr., Ann. Transvaal Mus. 10: 251 (1924).

A glabrous, often robust, herb, 15-38 cm. high; stem erect, leafy below; leaves 6-8, linear-lanceolate acuminate nerved. sometimes waved, 5-15 cm. long; spike cylindrical densely many-fl.,1,8-2,2 cm. in diameter, bracts shorter than the flowers, flowers about 4 mm, long; side sepals anticous, connate into an ovate-rotundate emarginate spreading piece; odd sepal linearoblong obtuse; petals obliquely semi-sack-shaped, falcately acute; limb of the lip small obovate emarginate, sessile on the keel of the appendage, appendage fleshy, rising free from the column on a straight erect keel, then dilated above ovate in outline and somewhat cowl-shaped, convex above, obtuse and eared at base; cells of the anther anticous erect; stigmas 2, situate in front on each side on the apices of a horse-shoe-shaped cushion.

Colour of the flowers clear sulphur-yellow.

SW. Cape Prov.

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Photograph copyright P.Linder Image used with kind permission. Photograph copyright P.Linder Image used with kind permission.