Quang Nam Prov., Dong Giang Distr., Ma Cooih Municipality around point 15°40′51”N 107°42′30”E.
Remnants of primary broadleaved evergreen closed forest on very steep rocky slopes of stream canyon composed with sandstone at elevation 400-450 m a.s.l.
Undershrub 0.5-1 m tall on wet open mossy stream rocks. Flowers blue-violet. Not rare.
HAL 12157 10 January 2009 Coll.: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh