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See list of 3 species in this genus

Reference: Webb and Rix (1972).

  • 1a. Corolla 2.5–3.5 (–4) mm long, cupuliform (i.e., not urceolate); anthers exserted from the corolla, lacking spurs; sepals broad-ovate; inflorescence a 2-flowered axillary raceme; petioles 0.5–1 mm long
  • 1b. Corolla 5–9 mm long, urceolate [Fig. 611]; anthers included within the corolla [Fig. 611], with spurs; sepals linear to lanceolate; inflorescence a terminal raceme; petioles 0.1–0.3 mm long
    • 2a. Leaf blades closely pubescent with short hairs and glandular-ciliate on the margin 
 [Fig. 611], variably revolute but some portion of the abaxial surface visible; calyx glandular-ciliate [Fig. 611]
    • 2b. Leaf blades glabrous and eciliate, the margin strongly revolute and contiguous, concealing the entire abaxial surface; calyx eciliate

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