Plants medium-sized, with red secondary pigment. Stems with branch and shoot apices not pencil-like; epidermal cells widened in part of stem circumference, forming partial hyalodermis; axillary hair distal cells 1-3, hyaline when young. Stem leaves ovate or triangular-ovate, gradually narrowed to apex, straight or almost so, strongly concave; base not decurrent; margins entire or in part minutely, obtusely denticulate; apex acuminate or sometimes blunt, ; costa ending shortly below apex; alar region from margins to costa or nearly so; .
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