2 



North Brazil : Para, Spruce, 136. 



Pig. 5, a male flower ; 6, andrcecium ; 7, a female flower 



H. guianensis, Aubl. PL Gui. ii. p. 871. Siphonia elastica, Pers. 



Syn. ii. p. 588. II. peruviana, Aubl. PL Gui. iv. t. 335. Siphonia 

 guyanensis, Juss. ex BailL Etud. Gen. Euph, p. 326. 



French Guiana : specimen ex Herb. Mns. Par. 6, without either 

 locality or collector's name. 



Fig. 8, a male flower; 9, andrcecium ; 10, pistil. 



H. rigidifolia, MueJL Arg. in Linncea, xxxiv, p. 203. Siphonia 

 rigidifolia, Spruce, ex Benth. in Hook. Keiv Journ, vi. (1854) p. 371. 



North Brazil : on the banks of the Uaupes River, Rio Negro, 

 Spruce, 2527. 



Fig. 11, a male flower; 12, perianth of female flower laid open, showing the disk ; 

 13, pistil. 



H. spruceana, MuelL Arg. in Linncea, xxxiv. p. 204. Siphonia 

 spruceana, Benth. in Hook. Keio Journ. vi. (1854) p. 370. 



North Brazil : Santarem, Spruce, 999. 



Fig. 14, a male flower laid open ; 15, andrcecium ; 16, a female flower laid open ; 

 17, vertical section of ovary. 



H. discolor, Mnell. A rg. in DC. Proclr. xv. 2, p. 717. Siphonia 

 discolor. Spruce, ex Benth, in Hook. Keiv Journ, vi. (1854) p. 3G9. 



North Brazil : Rio Negro, Spruce, 1171. 



Fig. 18, flower buds; 19, a young male flower; 20, andrcecium ; 21, pistil. 



H. confusa, Hemd. H. spruceana, Oliv. (pro parte) in Kew 

 Report, 1880 (1881), p. 37, et in Timehri, 18*2, p. 50; Jenman, 

 Report on India-rubber Trees, 1883, pp. 7-11. 



British Guiana : Mazaruni River, Jenman, 621. 



Plate 2574 : Fig. 1, an expanded female flower, the perianth falling away in a cir- 

 cumsciss manner, and buds of male flowers; 2, andrcecium; 3, pistil and part of disk 

 detached. 



M< tell 



(p? 



H. spruceana, 



1882, p. 50 ; Jenman, Report on India-rubber Trees, 1883, pp. 7-11. 

 H. membranacea, Muett.Arg. in Mart. Fl. Bras.xi.2, p. 29!). Siphonia 



pauciflora, Spruce, in Hook. A' - Journ. vi. (1854) p. 370. 



