Heiser, ?Ci. & Naturaleza [Quito] 11: 6. 1968.?, 1968.

Heiser, ?Ci. & Naturaleza [Quito] 6: 57. 1963.?, 1963.

Heiser, ?Ci. & Naturaleza [Quito] 11: 5. 1968.?, 1968.

Heiser, ?Ci. & Naturaleza [Quito] 6: 55. 1963.?, 1963.

Heiser, ?Ceiba 4: 298. 1955.?, 1955.

Heiser, ?in DArcy, ed., Solanaceae: Biol.& Syst. 413. 1986.?, 1986.

Heiser, ?Ceiba 4: 297. 1955.?, 1955.

(D. ) Deb, Deb, (D. ), and Heiser, ?Bot. J. Linn. Soc. 76: 294. 1978.?, 1978.