ROSACEAE 

 Pygeum affine sp. nov. § Cylopygeum. "^tUM. ■ ^(£-<^.JJ ,' /^tf. /9^J, 



Species P. ciliato Koehne simillima et affinis. differt foliis tenuioribus, 

 glandulis basalibus nullis vel, si praesentibus, planis, obscurissimis, nuUo 

 modo marsupialibus, nervis reticulisque supra haud impressis, antheris 

 vix 0.5 mm. longis. Arbor circiter 12 m. alla, ramis teretibus, subatris, 

 consperse lenticellatis, glabris vel junioribus decidue subferrugineo-pube- 

 scentibus, ramulis ultimis dense subferrugineo-villosis, circiter 1.5 mm. 

 diamètre; foliis chartaceis, ellipticis vel late oblongo-ellipticis, 11-16 cm. 

 longis, 5-7.5 cm. latis, breviter subobtuse acuminatis, basi plerumque 

 rotundatis, in sicco brunneis vel pallide olivaceo-brunneis, subtus pallidiori- 

 bus, supra ad costam nervosque subferrugineo-pubescentibus, ceteroquin 

 glabris vel in parenchymate pilos paucos brèves conspersissimos ferentibus, 

 subtus ad costam nervosque sat conspicue breviter ferrugineo-pubescenti- 

 bus, in parenchymate conspersissime pubescentibus glabrescentibus, mar- 

 gine planis vel minute revolutis si revolutis minute multiseriatim breviter 

 ciliatis; nervis primariis utrinque 8-9, supra planis. subtus elevatis, per- 

 spicuis, arcuato-anastomosantibus, reticulis primariis gracilibus, distinctis, 

 leviter elevatis; pétiole dense ferrugineo-pubescenti, 6-10 mm. longe; stipu- 

 lis caducis (haud visis) ; infiorescentiis dense ferrugineo-pubescentibus, 

 racemis 3-5-fasciculatis, vel rariter paniculatis, 4-6 cm. lengis, plerumque 

 in a.xillis defoliatis in ramis annotinis; pedicellis 1.5-3 mm. longis, bracteo- 

 lis oblanceolatis, l.S mm. longis, extus dense pubescentibus, intus glabris, 

 caducis; calycibus subcupulatis, extus ferrugineo-pubescentibus, intus, basi 

 exceptis, glabris, deorsum plus minusve angustatis, 3 mm, longis, segmentis 

 10, 5 (sepalis), triangulari-ovatis, acutis, pubescentibus, 1 mm. longis, S 

 alternis (petalis) aequilongis, anguste obovatis, obtusis vel rotundatis; sta- 

 minibus circiter 30, tilamentis glabris, l.S-3 mm. longis; antheris O.S mm. 

 longis; ovario ovoideo, circiter 1.2 mm. longo, deorsum ferrugineo-villeso, 

 sursum pilos sparses ferente; stylis 2.5-3 mm. longis; fructibus ignotis. 



Indo-Chin'.^, Tonkin, Chapa, Pételot 6160 (type), 6161, August 1930 and .'\ugust 

 1935, in forests, ait. about 1500 m. 



The alliance of this species is clear, but Koehne's sections are in part 

 based on very slight characters. The only other described species, Pygeum 

 cUiatum Koehne, te which this might be closely allied is Pygeum arboreum- 



1942] MERRILL. RECORDS OF INDOCHINESE PLANT.S, III 169 



"Kurz" (accredited by Kurz to Endlicher), but as Koehne notes, this spé- 

 cifie name cannot be retained as it was based on Polydontia arborea Blume 

 (see Jour. As. Soc. Bengal 45(2): 303. 1876) and Blume's species was 

 based on a mixture, including Pygeum latijolium. Miq., P. griseum Blume 

 P. parviflorum Teysm. & Binn., and P. Blumci Koehne, as interpreted by 

 Koehne. In Pygeum affine Merr. the basai glands are usuallv absent, or if 

 présent, then a single one, and this obscure and plane, net at ail saccate. 

 The inflorescences are mostly racemes, but occasienally there are one or 

 two latéral branches as much as 2.5 cm. long. 



