iiub Kciius iiuiii iiiuu-<_iiiiia, /i.\uium DUiunauf rrancn., ivpe iiuiu iviuuiiL 

 Bavi; this species is also represented by Pctrlot 2555 from the type locality. 

 O. C. Schmidt, Notizbl. Bot. Gart. Berlin 11: 100. 1931, recorded Asarum 

 caudigerum Hance from Tonkin and described .-1. Petelotii O. C. Schmidt 

 from Tarn Dao, Tonlvin, based on Pételot 3891. With the description of 

 the above two new species the total number now known from Indo-China 

 is five. 



POLYGONACEAE 

 Polygonum nuirrantliiim Meisn. in DC. Prodr. 14: 107. 1856. 



Indo-China, Tonkin, Sontoy Province, Mount Bavi, Pételot 6601, Nov. 1, 1940, in 

 humid places, ait. 700 m. Northern India, western and central China, and Japan. 



Polygonum Tliunbergii Sieb. & Zucc. FI. Jap. Fan. Nat. 2:84. 1846; Steward, 

 Contr. Gray Hcrb. 5(88) : 83. 1930, cum syn. 



Indo-China, Tonkin, Chapa, Pételot 1622, July 1924, ait. 1500 m. .\ssam, through 

 China to Sakhalin, Japan and Formosa, southward to Sumatra. 



Danser, Bull. Jard. Bot, Buitenz. III. 8: 224. /. 14. 1927, accepted the 

 binomial Polygomtm hastatotrilobum Meisn. ( 1865) for this species, which 

 Steward, op. cit. 84 places as P. Thunbcrgii Sieb. & Zucc. var. hastato- 

 trilobum (Meisn.) Maxim, Steward cites Pételot's number, having seen 

 the spécimen in the University of California herbarium. 



Polygonuin praelerniissum Hook. f. FI. Brit. Ind. 5:47. 1886; Steward, Contr. 

 Gray Herb. 5(88) : 86. 1930. 

 Indo-China, Tonkin, Balyn pagoda, near Hanoi, Pételot 791, Nov. 1922. India and 

 Ceylon to Japan, southward to Luzon, but as yet not recorded from the Malay 

 .^rchipelago. 



1-1.5 cm. latis,'margine distanter subcalloso-serratis, dentibus ad 2 mm. 

 longis, 1-3 cm, distantibus; nervis primariis utrinque 9-10, distantibus, 

 subtus elevatis, perspicuis, curvato-arcuatis, anastomosantibus, reticulis 

 primariis la.xis, sub lente distinctis; petiolo circiter S mm. longo, 4 mm, 

 crasso, transverse subplicato-rugoso; racemis in axillis superioribus, glaber- 

 rimis, breviter (2-2,5 cm.) pedunculatis, multifloris; floribus circiter 1.7 cm. 

 longis, pedicellis circiter 3 mm. longis, deorsum per paria connatis, bracteis 

 lanceolatis, acuminatis, vix 1 mm. longis, decit'uis, bracteolis deciduis, quam 

 bracteis duplo brevioribus; ovario glabro, anguste ovoideo, stylo 1,5 mm, 

 longo; antheris lineari-oblongis, 3 mm, longis; disci glandulis liberis, 

 oblongo-ovatis, circiter 0.7 mm. longis, obtusis. 



Indo-China, Tonkin, Sontoy Province, Mount Bavi, Pételot 2628, June 4. 1940, 

 altitude about 150 m. 



A species with free disk scales, falling in the group with Helicia tonkinen- 

 sis Lecomte but totally différent from that and the :losely allied H. cochin- 

 chinensis Lour. in its much larger, prominently too hed leaves. The short 

 very stout pétioles are transversely subplicate-rugos^ 



ARISTOLOCHIACEAE 

 Asarum glabruin sp. nov. 



Planta glabra, caulibus erectis, saltem 2-3-foliatis, 4-5 mm. diametro; 

 foliis longe (10-12 cm.) petiolatis, ovatis, basi profunde cordatis, sursum 

 angustatis et acute acuminatis, 12-21 cm, longis, 7-11 :m. latis, chartaceis, 

 lobis basalibus rectis vel paullo divaricatis, oblongis vel ovatis, late rotunda- 



tis 4.-^ rm Innoii; W4 =; rm latis nprxns hasalihiis 3. lateralibus CUrvatO- 



