165 



Dittrib. N.E. New Guinea and Caroline Islands. Wide in both hemi- 

 spheres, except Europe, to Tasmania, New Zealand, and Patagonia. 



*HYDROCOTYLE VULGARIS L. Sp. PI. ed. 1, 234 ; Schum. & Laut. 487. 



Arfak Mts., abundant in parts in open marsh by ? lake, 7000'. Fl., Fr. 

 Dec. 5943. 



Dftrib. Marshall Islands. Europe, through Transcaucasia to Caspian 

 Sea (Astara $ Enzeli). N.E. to S.W. Australia. N. and S. America and 

 West Indies. 



This is apparently the first record of this plant for E. Asia, as well as 

 New Guinea. 



HYDROCOTYLE JAVANICA Thunb. Diss. Hydroc. n. 17, t. 2 ; Ridl. in Trans. 

 Linn. Soc. ser. 2, Bot. ix. (1916) 62. 



Arfak Mts.. Angi lakes, in Papuan "kebuns" at foot of Koebre ridge, 

 7000'. Fl., Fr. Dec. 5650. 



Distrib. New Guinea (D.S.W., Mt. Oarstensz, Kloss). Malay Peninsula 

 and Archipelago, Philippines ; India, Ceylon, Indu-China; China and Japan. 



DIDISCUS KOEBRENSIS Gibbs, sp. nov. 



Planta perennis, gkberrima ; radix sat robusta ; caules decumbentes, radiatim 

 dispositi. Folia parva, ad nodos rosukta, in petiolum sensiin abeuntia, 3-lobata, 

 lobis plerumque unodentatis. Umbella multiflora, involucrum polyphyllum, 

 parvum, pedicellis parvis. Calyx dentibus 2-3, plerumque protractis, subuktis, 

 ceteris obsoletis. Petala parva. Fructus carpello uno abortivo vel minore ; rueri- 

 carpia compressa, 6-vittata, apice plus minus acuta, basi rotundata. Stylus elongatus. 

 Carpopliorum indivisuui, persistens. 



IJab. Arfak Mts., Koebre Mt., abundant on open burnt summit plateau. 

 9000'. FL, Fr. Dec. 5606. 



A plant of rosulate habit, with smooth reddish stems, 4 dm. long or less, 

 each shoot being densely invested with the old leaf-bases and bearing 

 rosettes of leaves at the nodes. The leaves are gradually narrowed into the 

 slender +25 cm. long petiole, with obcuneate lamina, + 1'5 by 5 mm.; 

 towards the apex of the branches the petioles are shorter and the lamina 

 larger, +2 by 1 cm. The umbels are 1/5 cm. across with many linear 

 involucral leaves, +'5 mm. long, on naked stalks, +11 cm. long, arising 

 singly from the apical rosettes of leaves. The minute flowers are 4 by 2 mm., 

 on pedicels +8 mm. long. Calyx-teeth +5 mm. long. Petals 1'5 by 1 mm. 

 Fruit 2 mm. across, with mericarps +25 mm. long. 



This plant makes the third in Domin's P seudocalycina group with 

 long drawn-out calyx teeth ; in habit and shape of leaves it agrees 

 with I), sanicula'folius (Stapf) Merr., var. novo-gmneensis Dom., from 

 Mt. Scratchley in S.E. New Guinea, to which it is probably allied, but in 

 the little material available of the latter it is impossible to determine the 

 form of the calyx teeth. 



