Siphonia pauciflora Spruce ex Bentham in Hooker 
Kew Journ. 6 (1854) 370. 
Siphonia Kunthiana Baillon Etude Gén. Euphorb. 
(1858) 826. 
Hevea brasiliensis GABK.) Mueller-Argoviensis in 
Linnaea 34 (1865) 204, pro parte. 
Hevea pauciflora (Spruce ex Benth.) Mueller-Argovi- 
ensis * [forma/] membranacea Mueller-Argoviensis in 
DC. Prodr. 15, pt. 2 (1866) 718. 
Hevea membranacea Mueller-Argoviensis in Martius 
Fl. Bras. 11, pt. 2 (1874) 299. 
Hevea Kunthiana (Baill.) Huber in Bol. Mus. Para. 
3 (1902) 349. 
Hevea membranacea Mueller- Argoviensis var. leiogyne 
Ducke in Arch. Jard. Bot. Rio Janeiro 6 (1988) 57. 
Hevea pauciflora (Spruce ex Benth.) Mueller-Argovi- 
ensis ssp. typica Ducke in Arch. Inst. Biol. Veg. Rio 
Janeiro 2 (1935) 239. 
Hevea membranacea Mueller-Argoviensis forma /eio- 
gyne Ducke |. c. 289. 
Hevea paucifiora (Spruce ex Benth.) Mueller-Argo- 
viensis forma tzpica Ducke in Bol. 'Téen. Inst. Agron. 
Norte 10 (1946) 17. 
Hevea pauciflora (Spruce ex Benth.) Mueller-Argovi- 
ensis forma leiogyne (Ducke) Ducke |. ¢. 17. 
For some time now it has seemed to me that one 
specific concept is involved in the two binomials, AZevea 
pauciflora and H. Kunthiana. Study of the type of 
Siphonia Kunthiana inthe Paris Herbarium in 1950 has 
convinced me that this suspicion was well founded. A 
critical examination of the type collection, a unicate rep- 
resented only in Paris, was necessary before coming to 
a definite conclusion, because the type of Hevea Kunth- 
jana is completely sterile, and the description alone 
affords few definite characters. A brief survey of the 
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