Derwentia Raf.

Shrubs not rooting at the nodes Derwentia
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Leaves lanceolate to ovate, more than 10 mm wide
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Leaves not recurved or v-shaped
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Leaves stem-clasping, often connate at the base, ovate to narrow-ovate, acuminate or acute, glaucous, usually entire. Corolla bluish, streaked with purple, 5–6 mm long. Herb up to 1.5 m high. Higher Blue Mts Open forests. Fl. summer. Digger’s Speedwell Derwentia perfoliata
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Leaves not stem-clasping, glaucous underneath, narrow-ovate to lanceolate, 5–10 cm long, acuminate, serrate, 30–80 pairs of teeth per side. Corolla white or blue, 5–6 mm diam. Herb up to 1 m high. Higher Blue Mts Fl. summer Derwentia derwentianasubglauca