Pterygodium crispum flowers

The inflorescence of Pterygodium crispum is a dense, erect spike of about 14 cm in length, often many-flowered. A flower is about 8 mm long.

The slightly fragrant flowers are bright yellow, while the lip appendage of the resupinate flower is green. The lateral petals cohere with the dorsal sepal over the flower centre like a hood. The lateral sepals are joined for the biggest part. The spoon-shaped lip that is joined to the column ends in two lobes. The lip has a two-lobed appendage that is bent down, the rostellum arms flanking it.

The lip appendage secretes oil of interest to pollinators, particularly some Rediviva bee species. The bracts below the flowers are broadly ovate with acute tips. Flowering happens from late winter to after midspring (Liltved and Johnson, 2012; Le Roux, et al, 2005).