Ferreyra, ?Bol. Soc. Peruana Bot. 7 (1-2): 3-5. 1974.?, 1974.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 5, tab. 3. 1955.?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 9, tab. 6. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. no. 12: 1, tab. 1. 1960?, 1960.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. no. 10: 4, tab. 2. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 10, tab. 7. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 14, tab. 10. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. no. 12: 3, tab. 2. 1960?, 1960.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. no. 10: 3, tab. 1. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 8, tab. 5. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 7, tab. 4. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 13, tab. 9. 1955?, 1955.

Ferreyra, ?Publ. Mus. Hist. Nat. "Javier Prado", Ser. B, Bot. 10: 11, tab. 8. 1955?, 1955.