186 



apiculata, basi obtusa, inae(|ualia, 5-13 mm. longa, 3-7 mm. lata, 

 supra fusca, siibtus pallida, rigida, nervis lateralibus uti-inque 4-5 

 intra marginem arcuatis pagina neutra conspicuis ; petioli breves ; 

 stipulae circiter 3 mm. longae. Flares (^ pedicellis 5-6 mm. longis 

 suffulti. Sepala 4, subrliomboidea, irregulariter serrata, 1*5 ram. 

 longa, 1*5 mm. lata. Disci glandulae 4, sepalis alternae, transverse 

 ellipticae. Stamina 4, filamentis in columnam brevem apiculatam 

 (ob ovarii rudimentum ?) connatis. Flores Q pedicellis ad 7 mm. 

 longis suffulti. Sepala 6, anguste obovata, apice rotundata, 1*25 

 mm. longa, 0*75 mm. lata, glabra. Disci glandulae basi plus 

 minusve connatae, ovario dimidio breviores. Ovarium 0*75 mm. 

 altum ; styli suberecti, bifidi. — Craih, Kew Bull. 1911, p. 459. 



Chiengmai, by a stream on Doi Sootep, 480 m., Kerr, 657. 



Phyllanthus sp. n. ? 



Angkor, Godefroy-Lebeuf, 682. 



Phyllanthodendron album, Craib et Hutchinson, Kew Bull. 1910, 

 p. 279. 



Chiengmai, on old clearings on Doi Sootep, 720-810 m., Kerr, 

 521, 5%Q. 



Phyllanthodendron mirabile, Hemsl., Hook. Ic. PL, t. 2563-64. 

 PhyllantMis mirabilis, Muell.-Arg. 



Bangkok^ Schomlnirgk. 



The leaf specimens referred to by WilHams, Bull. Herb. Boiss., 

 v. (1905) p. 50 evidently do not belong to this species or in fact to 

 Euphorbiaceae. 



Phyllanthodendron roseum, Craib et Hutchinson, Kew Bull. 1910, 

 p. 23 ; Hook. Ic. PL, t. 2935. 



Chiengmai, in evergreen jungle by a stream on Doi Sootep, 730 m., 

 Kerr, 697. 



var. siamensis, Craib. P. siamensis, Hosseus, Fedde Rep. Nov. 

 Sp., X. p. 116. Uranthera siamensis, Pax et K. Hoffm., Engler 

 Pflanzenr., Euphorb.-Cluytieae, p. 95. 



Chiengmai, Doi Sootep, 1600 m., Hosseus, 505. 



As noted in Hook. Ic. PL, I.e. Pax did not feel justified in 

 retaining Hemsley's genus Phyllanthodendron and followed Mueller 

 in treating Schomburgk's plant as a Phyllanthus. But there is 

 nothing to separate generically the plant collected by Hosseus and 

 made the type of the new genus Uranthera by Pax and 

 Hoffmann from Schomburgk's plant. In floral detail Hosseus 

 505 agrees with the type of Phyllanthodendron roseum except that 

 the ovary is glabrous. The petaloid disk glands have been 

 regarded by Pax and Hoffmann as true petals and they have 

 therefore placed the plant in the tribe Cluytieae. 



Hosseus, ii. p. 406, enumerates this plant as P. roseum, var. glabrum, 

 Craib. I had intended using that name until Dr. Hosseus drew my 

 attention to the pubHcation of Uranthera siamensis. For the sake 

 of uniformity I then adopted the varietal name siamensis although 

 it was not an ideal name to use for a genus which at that time was 

 known only from Siam. 



