[2019] Sloane, ibid.; Clos, Ann. Sc. Nat., 4th. series, vol. viii. p. 260; Grisebach, Fl. of Brit. W. Ind. Is., p. 20.

[2020] Seemann, Bot. of Herald., pp. 79, 268; Triana and Planchon, Prodr. Fl. Novo-Granat., p. 94; Meyer, Essequebo, p. 202; Piso, Hist. Nat. Brasil, edit. 1648, p. 65; Claussen, in Clos, ubi supra.

[2021] Roxburgh, Fl. Ind., ii. p. 581; Oliver, Fl. Trop. Africa, i. p. 114.

[2022] Géogr. Bot. Rais., p. 971.

[2023] Parlatore, Le Specie dei Cotoni, text in 4to, plates in folio, Florence, 1866.

[2024] Todaro, Relazione della Coltura dei Cotoni in Italia, segnita da una Monographia del Genere Gossypium, text large 8vo, plates in folio, Rome and Palermo, 1877-78; a work preceded by several others of less importance, which were known to Parlatore.

[2025] Masters, in Oliver, Fl. Trop. Afr., i. p. 210; and in Sir J. Hooker, Fl. Brit. Ind., i. p. 346.

[2026] Kurz, Forest Flora of British Burmah, i. p. 129.

[2027] Piddington, Index.

[2028] Theophrastus, Hist. Plant., lib. iv. cap. 5.