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See list of 3 species in this genus

Reference: Core (1941).

  • 1a. Stipules 2.5–8 mm long; calyx 3.5–5 mm long, each lobe tipped by a prominent awn 0.9–2 mm long; flowers concealed by conspicuous white bracts; plants perennial
  • 1b. Stipules 0.5–3 mm long; calyx 1–3 mm long, each lobe with a tiny apiculus or short awn up to 0.3 mm long; flowers not concealed by bracts; plants annual

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 Show photos of:   Each photo represents one species in this genus.