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Pod flattened contrary to the narrow partition; the two cells indehiscent and falling away at maturity from the partition as closed nutlets, strongly wrinkled or tuberculate, 1 seeded.

Specimens from the White River in South Dakota, collected on July 7, 1934, include tuberculate males.

Syrrhophus nivocolimae is the only species with tubercles along the outer edge of the tarsus; this is merely a reflection of the highly tuberculate nature of the skin in this species.

Also, it is the least tuberculate species in the genus.

The ectocyst is colourless or faintly tinted with brown; as a rule it is not quite hyaline and the external surface is minutely roughened or tuberculate.