Hill and Hill, ?Brit. Herb. 96 (1756); Druce, in Rep. Bot. Exch. Cl. Brit. Isles. 1913, iii. 437.?.

Hill, ?Veg. Syst. 9: 40. 1765.?, 1765.

Hill, ?Veg. Syst. 9: 36. 1765.?, 1765.

Hill, ?Veg. Syst. 9: 39. 1765.?, 1765.

Hill, ?Veg. Syst. 9: 34. 1765.?, 1765.

Hill, ?Veg. Syst. 9: 27. 1765.?.

Hill, ?Hort. Kew. 148. 1768.?, 1768.

Hill, ?Hort. Kew. 148 (1768).?.

Hill and Hill, ?in Jacquem. Voy. Bot. 113. t. 120 (1844).?.